1
DEPARTMENT OF HEALTH AND HUMAN
SERVICES
FOOD AND DRUG
ADMINISTRATION
CENTER FOR DRUG EVALUATION AND
RESEARCH
JOINT MEETING OF THE
CDER PSYCHOPHARMACOLOGIC DRUGS
ADVISORY COMMITTEE
AND THE
FDA PEDIATRIC ADVISORY
COMMITTEE
Holiday Inn
2
PARTICIPANTS
Wayne Goodman, M.D., Chair
Anuja M. Patel, M.P.H., Executive
Secretary
PSYCHOPHARMACOLOGIC DRUGS ADVISORY
COMMITTEE
MEMBERS
James J. McGough, M.D.
Jean E. Bronstein, R.N.,
M.S. (Consumer Rep)
Philip
S. Wang, M.D. M.P.H., Dr. P.H.
Dilip J. Mehta, M.D.,
Ph.D., (Industry Rep)
Lauren Marangell, M.D.
Delbert G. Robinson, M.D.
Daniel S. Pine, M.D.
Barbara G. Wells, Pharm. D.
Bruce G. Pollock, M.D., Ph.D.
PEDIATRIC ADVISORY COMMITTEE MEMBERS
P. Joan Chesney, M.D.
Deborah L. Dokken, M.P.A.
Michael E. Fant, M.D., Ph.D.
Richard L. Gorman, M.D.
Robert M. Nelson, M.D., Ph.D.
Thomas B. Newman, M.D., M.P.H.
Judith R. O'Fallon, Ph.D.
Victor M. Santana, M.D.
SGE CONSULTANTS (VOTING)
Norman Fost, M.D., M.P.H.
Charles E. Irwin, Jr.,
M.D.
Lauren
K. Leslie, M.D., FAAP
Steven Ebert, Pharm. D.
James M. Perrin, M.D.
Cynthia
R. Pfeffer, M.D.
Robert
D. Gibbons, Ph.D.
Tana A.
Grady-Weliky, M.D.
Richard P. Malone, M.D.
Irene E. Ortiz, M.D.
Matthew V. Rudorfer, M.D.
SGE PATIENT REPRESENTATIVE (VOTING)
Gail W. Griffith
GUEST SPEAKERS (NON-VOTING)
Kelly Posner, Ph.D.
3
PARTICIPANTS
(Continued)
GUESTS (NON-VOTING)
Samuel Maldonado, M.D.,
M.P.H.
FDA
Robert Temple, M.D.
Russell G. Katz, M.D.
PARTICIPANTS (Continued)
Thomas Laughren, M.D.
M. Dianne Murphy, M.D.
Anne Trontell, M.D., M.P.H.
4
C O N T E N T S
Call to Order and Opening Remarks:
Wayne Goodman, M.D. 5
Conflict of Interest Statement
Anuja Patel 6
Opening Comments
Thomas Laughren, M.D. 9
Committee Questions and Discussion 31
Presentation
Diane Wysowski, Ph.D. 152
Committee Discussion of Questions and
Vote 163
Concluding Remarks
P. Joan Chesney, M.D. 402
Wayne Goodman, M.D. 404
5
P R O C E E D I N G S
Call to Order and Opening
Remarks
DR. GOODMAN: Welcome to day two of this
joint two-day session of the
Psychopharmacologic
Drugs Advisory Committee and the
Pediatric Advisory
Committee being held on September 14,
2004, here at
the Holiday Inn in Bethesda, Maryland.
We are convened to address
recent concerns
about reports of suicidal ideas and
behavior
developing in some children and
adolescents during
treatment of depression with selective
serotonin
reuptake inhibitors and other
antidepressants.
Our goal is to gather
information from a
variety of sources and perspectives to
help us
understand this complex situation and
ultimately,
to offer the best possible
recommendations to the
FDA.
Now, I would like to turn the
microphone
to Anuja Patel of the FDA Center for Drug
Evaluation and Research and Executive
Secretary of
this committee to read the conflict the
interest
statement into the record.
6
Conflict of Interest
Statement
MS. PATEL: Good morning.
The following
announcement addresses the issue of
conflict of
interest and is made a part of the record
to
preclude even the appearance of such at
this
meeting.
The topics to be discussed today
are
issues of broad applicability. Unlike issues
before a committee in which a particular
company's
product is discussed, issues of broader
applicability involve many industrial sponsors
and
products.
All Special Government
Employees and
invited guests have been screened for
their
financial interest as they may apply to
the general
topics at hand.
The Food and Drug Administration
has
granted particular matter of general
applicability
waivers under 18 U.S.C. 208(b)(3) to the
following
Special Government Employees which
permits them to
participate fully in today's discussion
and vote:
Jean Bronstein, Dr. Joan Chesney, Dr.
Wayne
7
Goodman, Dr. Lauren Marangell, Dr. James
McGough,
Dr. James Perrin, Dr. Bruce Pollock. In addition,
Dr. Philip Wang has been granted a
limited waiver
that permits him to participate in the
committee's
discussions. He is, however, excluded from voting.
A copy of the waiver statements
may be
obtained by submitting a written request
to the
Agency's Freedom of Information Office, Room
12A-30
of the Parklawn Building.
In addition, Dr. Judith
O'Fallon and Dr.
Victor Santana have de minimis financial
interests
under 5 CFR Part 2640.202 that are
covered by
regulatory waiver under 18 U.S.C.
208(b)(2).
Because general topics impact
so many
entities, it is not practical to recite
all
potential conflicts of interest as they
apply to
each member, consultant, and guest
speaker.
FDA acknowledges that there may
be
potential conflicts of interest, but
because of the
general nature of the discussion before
the
committees, these potential conflicts are
mitigated.
8
With respect to FDA's invited
industry
representative, we would like to disclose
that Dr.
Dilip Mehta and Dr. Samuel Maldonado are
participating in this meeting as industry
representatives acting on behalf of
regulated
industry.
Dr. Mehta is retired from Pfizer and Dr.
Maldonado is employed by Johnson &
Johnson.
With respect to all other
participants, we
ask in the interest of fairness that they
address
any current or previous financial
involvement with
any firm whose product they may wish to
comment
upon.
Thank you.
DR. GOODMAN: Thank you, Anuja.
We will be starting off this
morning with
a presentation from Tom Laughren who will
give us
an overview and also pose the questions,
the five
questions to this committee.
Following his presentation, I
would invite
questions. I also think it would be a good time
before we get into the meat of our
discussions to
ask representatives from the FDA
questions, to
9
further interrogate some of the data that
was
presented yesterday.
Before we get into the actual
discussion
of the questions, I would like us to
think of the
questions that were carried over from
yesterday,
pose those, and then we will take a short
break,
reconvene and start the process of
discussing the
questions.
Is that clear? Okay.
Tom, are you ready?
Opening Comments
Thomas Laughren, M.D.
DR. LAUGHREN: Good morning.
I would also
like to welcome everyone back to the
meeting today.
I would like to do a couple of things in
my few
minutes here.
First of all, what I want to do
is to
briefly review what I think are some of
the key
findings from Dr. Hammad's presentation
yesterday,
so that you have these in mind as you are
considering the questions before you.
Then, I want to talk a little
bit about
10
what I think the data mean and talk about
what some
of the regulatory options are as you are
considering our questions, and then I
want to go
over the questions and the topics again.
These are the 24 trials that we
are
considering. Again, 16 of them were in
major
depression, and the other 8 trials were
in several
various psychiatric disorders - OCD, GAD,
1 in SAD,
and 1 in ADHD.
Again, just for summary, I
think these are
the three contributions that the Division
made to
this effort. Again, we went to a lot of
effort to
make sure that we had complete case
finding. With
the help of Columbia, we accomplished
what I think
is a rational classification of these
events, and
we both obtained and included patient
level data in
our analysis of the suicidality data
again to try
and understand some of the differences
both between
trials, within programs and across
programs.
These are the outcomes that we
looked at
again. The focus of the analysis was on
two areas,
the suicidality event data and also on
the suicide
11
item data.
For the event data, could we
have the
other slide up that we had running
yesterday? Our
primary endpoint, as you recall, was the
combination of suicidal behavior and
ideation,
Codes 1, 2, and 6, where 1 was suicide
attempt, 2
was preparatory actions, and then 6,
suicidal
ideation.
So, that was our primary
endpoint, but we
also looked at secondary endpoints, at
suicidal
behavior, in other words, Codes 1 and 2,
and then
suicidal ideation, Code 6, and then for
our
sensitivity analysis, we looked at this
larger
outcome including 1, 2, and 6, but also
adding in 3
and 10, where again, 3 is self-injurious
behavior
where the intent is not known, and 10 is
not enough
information. Again, these are the cases where
there is injury, but it is not possible
to tell
whether it's self-injury or other injury.
With regard to the suicide item
data, we
looked at two measures about worsening
suicidality
on that item or emergence, and these
again are the
12
cases where the patients are normal at
baseline and
have some increase during the trial.
In terms of our analytical
plan, the major
focus was on doing risk ratio analyses,
both for
the suicidality event data and for the
item data.
In both cases, we looked at individual
trials, as
well as for the event data, we looked at
various
pools.
We looked at both by drug, we
combined all
the SSRIs, MDD trials as a group, we
looked at all
of the other indications combined as a
group and
also did one pooling which included all
24 trials.
For the item data, we looked again at
individual
trials and then a pooled analysis over
all trials.
Dr. Hammad put a lot of effort into
again
trying to explain the differences that we
were
seeing between trials within programs and
across
programs, and I just want to spend a
couple of
minutes talking about exactly what he
did.
He looked for confounding
within trials
using both the univariate approach and a
multivariate approach. There were a total of 17
13
covariates that he looked at. He was not able to
find any evidence for important
confounding in that
search.
He also did stratified analysis
to explore
for effect modification. The three variables that
he looked at were age, gender, and
history of
suicide attempt or ideation, so
basically, what he
did in each of these is to stratify on
these
variables within trials to look to see if
there was
basically an interaction.
Again, he did not find any
evidence for
that, so basically, what that means is
that on
these variables, you find the signal both
in
children and adolescents, you find it
both in males
and females, and you find it both in
those with and
without history of suicide attempt or
ideation.
Finally, he looked at 12 trial
level
covariates, again, as an attempt to try
and explain
the differences across trials using a
meta-regression approach. Again, that approach was
not able to explain the variability.
Now, I would say that one of
the problems
14
in doing these kinds of explorations is
that there
is very limited power, you have a very
small number
of events. When you use an eyeball approach to the
data, you can't help but thinking that
trial
differences might have made a difference.
I just use the TADS, the fluoxetine
situation as an example. The company had three
trials.
There was no signal coming from those
three trials. If you look at the careful screening
that was done to obtain the patients for
those
samples, and the exclusions of patients
with prior
histories of treatment resistance, and so
forth,
and then you look at the TADS sample,
which is many
ways was probably more representative of
the
community of patients who actually get
treated,
there is quite a difference. Again, as you recall,
in the TADS trial, you see quite a
striking signal
for suicidality.
So, even though quantitatively,
we weren't
able to tease that out and to explain the
differences using various quantitative
approaches,
it is hard to think that that may not
have made a
15
difference.
In my next three slides, I am
going to
present very briefly some of the data.
What this slide is, is
presenting the risk
ratios for various poolings. So, in this column,
you have the risk ratios on our primary
endpoint,
which was suicidality ideation or
behavior, 1, 2,
and 6.
In the second column, you have
this
expanded sensitivity analysis, 1, 2, 6,
plus adding
3 and 10.
The first row is all trials, so this is
a pooling across all 24 trials. In the second row,
you have the pooling of the 11 trials
with SSRIs
and major depression.
Now, there are two things I
want you to
notice about this slide. First of all, in every
case, the risk ratios are around 2. They range
from 1.7 to 2.2, but they are sort of in
the
vicinity of 2.
Secondly, if you look at the
confidence
intervals on these risk ratios, in every
case, it
does not include 1, so in that sense, it
is a
16
statistically significant finding. So,
this is the
pooled data.
What I have given you in this
slide are a
different set of poolings. Here, what I am doing
is
pooling the individual depression trials in the
7 programs that looked at depression, and
these are
the 7 programs listed here. Every row is a
separate depression program.
What I have given you here,
first of all,
is the outcome on our primary endpoint a
combination of 1, 2, and 6. I have also given you,
in the second column, the outcome on
suicidal
behavior, and in the third column, the
outcome on
suicidal ideation.
There are a couple of things I want you
to
notice about this slide. First of all, in every
instance where we have events, and we had
no events
for Serzone, but in the other 6 instances
where you
have events, the risk ratio is always
greater than
1.
Now, I want to turn to trying
to tease
apart where that overall effect is coming
from if
17
you break it apart by behavior and
ideation. Dr.
Hammad made this point yesterday, in
three cases it
appears as if the overall effect is
coming from
behavior, in three cases it looks like it
is coming
from ideation.
So, if you look at Celexa, here
is the
risk ratio for behavior, 2.23. There is nothing
happening for ideation.
If you look at Paxil, again, it
looks like
it is coming mostly from behavior.
If you look at Prozac, it looks
like it is
probably coming more from behavior than
from
ideation.
For Effexor, there is a signal
coming from
both, but it is clearly coming more from
ideation.
Here, the confidence interval is almost
significant.
For Remeron, it is all coming
from
ideation, and from Zoloft, there is
nothing
happening for behavior, it is all coming
from
ideation.
I am not sure what this
means. As Dr.
18
Hammad pointed out, this may simply be a
small
numbers problem, but we are not seeing a
consistent
finding in terms of where the overall
effect is
coming from.
Finally, what I have given you
in this
slide is the data from the individual
other 8
trials in non-MDD indications. As you get into
these trials, the number of events you
are dealing
with is very small, and just to
illustrate that, I
have put the actual number of events in
this slide.
So, in each of these
parentheses, the
first one is the number of events for
drug, and the
second one is for placebo. So, you can see the
small number of events that we are
dealing with.
If you recall from the previous
slide, for
Effexor, we were seeing quite a strong
signal for
major depression. These are two GAD studies.
There is nothing at all happening here.
For Luvox, again, Luvox was only
studied
in OCD, there was no depression
trial. Just one
study in depression, only two
events. They were
both happening in the drug group.
19
For the two non-MDD Paxil
studies, one in
social anxiety, one in OCD, again, small
numbers of
events, but in both cases, they were
happening in
the drug group.
The same for the Prozac OCD,
just one
event, but it happened in the drug group.
No events for Wellbutrin.
For Zoloft, this is the only
case where
the one event is happening in placebo,
and not in
drug.
It is hard to know what to make
of all of
this, although the one thing that you
can't help
noticing is that even though there are a
small
number of events, where events occurred,
they most
happen on the drug side.
Just to summarize these data,
again, if
you look at various pooled analyses, the
risk
ratios hover around 2. They range from 1.7 to 2.2.
In all cases for those poolings, it
appears to be a
significant finding.
The signal appears to be coming
mostly
from major depression, although perhaps
not
20
exclusively. Despite those findings, there still
are these inconsistencies in this risk,
both across
trials, within programs and across
programs.
On the other hand, my view
is--and there
isn't necessarily one consistent view
coming out of
FDA on this--but my view is that this is
a
reasonably consistent signal for
risk. You are
seeing it in seven of nine programs. We don't see
any events in Wellbutrin. On the other hand,
Wellbutrin was only studied in ADHD, just
one
trial.
There is no signal coming from
Serzone,
which was studied in major
depression. I am not
sure if that means that Serzone is free
of risk or
it simply may mean that the events, the
ascertainment in those programs was not
good enough
to pick them up. I don't know the answer.
One other point that Dr. Hammad
made
yesterday, that I want to return to, is a
way of
thinking about this risk is in terms of
risk
difference, and if you look over all
these trials
and estimate what the risk difference is,
that is
21
the difference in the risk between drug
and
placebo, so you are subtracting the
placebo risk
from the drug risk, it is in the range of
2 to 3
percent.
What that means is that again,
out of 100
patients treated--this is short term now,
short-term treatment--you can expect 2 or
3 out of
that 100 will have some excess of suicidality
above
and beyond what would be in the
background that is
due to drug.
As a clinician, what you have
to do is to
balance that risk against the perceived
benefit.
The problem here, of course, is that we
only have,
at least from FDA's standpoint, a
demonstration of
benefit for Prozac, but if you take the
TADS trial
as an example of benefit, there, you can
look at
the benefit difference, and the benefit
difference
in the TADS trial, difference between
drug and
placebo in percent of responders, using
that as the
measure of benefit, it is about 25
percent.
Again, you can interpret that
in the same
way, so that if you look at 100 patients
who are
22
treated with fluoxetine, you can expect
that about
25 out of 100 will have that benefit if
you are
looking at response as the benefit.
So, you balance that against
the risk,
which again in that trial, the risk
actually was
greater than the 2 percent, it was
probably more on
the order of 7 percent, but you balance
that risk
against the benefit. That is the kind of calculus
that a clinician has to do.
Finally, as was pointed out,
there were no
completed suicides in any of these
trials.
Again, we did not see the same
signal in
looking at the item data. One exploration we tried
to do to see if that could be explained
by patients
dropping out, and unfortunately, that was
not an
explanation. The analysis of completers did not
show really any difference from the
analysis of the
patients who dropped out.
So, how should these findings
be
interpreted? I think that this is an indication
that there may be some increased risk for
suicidality during short-term treatment,
and I
23
think this is probably a class
effect. Again, you
are not seeing it in every drug that we
looked at,
Serzone and Wellbutrin being the two
exceptions,
but I think there is enough here to suggest
that
this is probably a class effect.
The signal appears to be most
compelling
in major depression. It may not be limited to that
population, but again we are left with
this very
unusual variation in the signal across
trials,
within programs and across programs that
we have
not been able really to explain.
What I want to do next is to
talk about
what some of the regulatory options are,
and I
first want to talk about possible
labeling changes.
As you recall, we already made
a fairly
major change to labeling back in March,
and all of
those changes have now been
implemented. There is
a fairly prominent warning statement that
directs
the attention of prescribers to this
possible
event.
Now, that language as it
currently is
written suggests that causality has not
been
24
established.
One thing that might be done to
modify that, if there is agreement on
this, we
could say that causality has now been
established
for this risk in pediatric patients.
In addition to that, we could
go beyond
that and provide specific suicidality
findings in
the labels for different products. We could also
provide more specific information about
the
efficacy findings for specific products
in that
language.
There are other things to talk about in
terms of that warning statement including
things
like bolding language or putting black
boxes.
These are all options that are on the
table.
The other option that you need
to think
about, and you heard many yesterday in
the open
session ask us to do this, you can think
about
contraindications. The one thing I want to point
out is that in this country, for our
label, a
contraindication means never. It means that that
drug will never be used in treating these
patients,
it is not an option.
25
The other thing I want to point
out is
that the term
"contraindication" has different
meanings in different regulatory
settings. In some
settings, it does not mean never. If you read the
fine print in the UK, for example, there
is a
suggestion that specialists may still use
that
drug.
So, you need to keep that in mind that in
this country, a contraindication means
that that
drug is never an option.
In addition to labeling
changes, there are
some other obvious actions that we can
and almost
certainly will take. Our plan at present is to
write a medication guide. This is
basically
labeling which ideally would be attached
to the
medication when it is prescribed in unit
of use
packaging.
In addition to that, we will undoubtedly
have another public health advisory when
we decide
on what needs to be done, and we will try
and
communicate these findings to our
partners.
Now, what I would like to do
again is to
quickly go through the questions and the
topics.
26
The first topic is again we would like to
have your
comments on our approach to classifying
these cases
and
to our analysis of the data.
One of the questions for which
we really
need to have you vote on is do you feel
that the
suicidality data from these trials
support the
conclusion that any or all of these drugs
increase
the risk of suicidality in pediatric
patients.
If the answer to that question
is yes, to
which of these nine drugs does this
increased risk
apply, in other words, is this a class
effect for
all antidepressants, does it apply to
certain
subclasses within this broader class, or
to
specific drugs?
If this is a class risk or if
it applies
to certain drugs, how should this
information be
reflected in the labeling for each of
these
products, and what, if any, additional
regulatory
actions should the agency take?
Finally, there is this question
about what
additional research is needed to further
delineate
the risks and the benefits of these drugs
in
27
pediatric patients with psychiatric
illness.
At our last meeting, I
suggested one type
of study that you might think about, and
I am going
to make that suggestion again, because we
think
that this is one study that might get at
one of the
deficiencies here, and that is, not only
do we not
have enough information about short-term
benefit,
we also have little information about
longer term
benefit or risk.
One way of getting at longer
term benefit
is the randomized withdrawal study. Basically, the
way the study works is that patients who
are
responders or appear to be responding to
treating,
at some point in the course of treatment,
are
randomized to either continue on drug or
randomized
to placebo, and one looks at time to
relapse as the
outcome.
Now, I know there are concerns
about that
design. You know, one concern is the
ethical issue
of taking patients off a medication when
they
appear to be responding. I agree that is
a concern,
but I think there is a way of dealing
with that.
28
The usual randomized withdrawal
trial is
done after too short a period of time on
treatment.
I mean typically, they are done now after
12 weeks
or so of treatment. That is too soon. No
clinician would take a patient off of one
of these
medications at that point in time.
On the other hand, at some
point in the
course of treatment, whether it is six
months or
nine months or a year, it seems to me
that it is a
reasonable question. At some point, you reach
equipoise where the clinician has to ask
the
question, well, is this long enough, you
know, is
there any benefit in continuing the treatment
beyond this point in time.
Now, that is a much harder
study to do, to
keep patients on treatment for nine
months or a
year before you randomize them, but that
would be a
way of answering that important question
of whether
or not there is continuing benefit beyond
that
point in time.
The other concern that has been
raised
about these trials is the issue of
distinguishing
29
between withdrawal symptoms and
relapse. Again, I
agree that this is a reasonable concern,
but I
think there is also a way of addressing
that.
In clinical practice these
days, these
drugs are tapered. One doesn't stop them cold
turkey.
I think that could also be part of that
design, and that could address that
issue. So,
that is one thing to think about.
Before I end, I want to leave
you with two
thoughts.
We clearly have an obligation at FDA to
inform clinicians and patients about the
risks that
are associated with these drugs, and we
take this
obligation very seriously.
Along those lines, I just want
to point
out that our current regulations do not
require the
same level of certainty with regard to
safety in
terms of causality as is required for
efficacy. In
other words, we can issue warning
statements with
somewhat lesser certainty about causality
than is
required to support a claim.
Secondly, as I have pointed out
several
times, the lack of efficacy data in this
setting
30
for most of these drugs needs to be part
of this
discussion. On the other hand, and I am not making
your job easy, please bear in mind that
depression,
whether in adults or children, is a very
serious
illness that is associated with morbidity
and
mortality quite apart from whatever role
antidepressants might have.
As was pointed out yesterday,
this is the
major cause of death in this population,
the
depression itself, so please bear that in
mind.
I have very profound respect
and gratitude
for the clinicians who are out there on
the front
lines still willing to take care of these
patients
despite what has become a very
controversial and
difficult environment.
I hope that as we discuss these
issues and
make a decision, that we not make it
impossible for
them to practice medicine.
Thank you.
DR. GOODMAN: Thank you, Tom, for a cogent
and clear presentation.
I would like to ask committee
members if
31
they have any questions of Tom.
Committee Questions and Discussion
DR. FOST: This is for Tom or anyone else
who has a handle on the numbers. I know there is
no precise answer to it, but it would be
helpful to
me to just hear you or someone else,
maybe Dr.
Shaffer, if he is still here and is
allowed to
talk, this question.
Suppose there were no SSRIs,
suppose they
were contraindicated, that is,
prohibited,
approximately, let me just ask the
question about
suicides, about completed suicides, and I
understand there is no suicides in the
FDA data,
but based on everything that we know,
approximately, would there be more
suicides, fewer
suicides, or the same amount if there
were no SSRIs
in children?
DR. TEMPLE: There is not going to be any
way to answer that, in part because you
can't do
rigorous studies of the kind that would
answer
that.
No one is going to let you not treat, not
institutionalize, et cetera, someone who
is getting
32
worse and worse, and it would require
long-term
studies presumably against no treatment,
and it is
not easy to figure out how anybody is
going to do
those.
So, you are left with the kind
of data
that people have pointed out is always
uncertain,
the data on suicide rates and whether
they are
going up or down, so it is very hard to
answer that
question.
There were no completed
suicides in the
pediatric data, so that doesn't give you
a clue.
You can form your own judgment about
whether
increased suicidal behavior or thinking
is going to
lead to suicides in a certain fraction of
cases.
It is hard to imagine that it couldn't,
but you
don't know what that ratio is.
The success rate of suicidal
attempts is
relatively low. I gather it is higher in males
than females, but I don't think there is
going to
be ways to put numbers on that.
You have to form your judgment
about
whether you think the overall decline in
suicides
33
has got something to do with therapy or
has
something to do with other aspects of
life in the
United States, and nobody can give you a
firm
answer to that, as Dr. Wysowski said and
as others
have said. So, it is very hard to answer that
question.
Certainly, some of the people
who spoke
yesterday, some of the treating
physicians were
quite sure that they were helping people
with the
drugs, and you heard families who said
that their
relatives were made much worse by the
drugs.
Putting numbers on that, though, isn't
feasible
based on the data we have.
DR. FOST: A related question. To those,
Dr. Shaffer and others who note a decline
in
suicides in the United States, in
parallel with the
increased use of SSRIs, and let's just
say which
should be an increase in suicidality,
suicidal
ideation due to SSRI, what is the
hypothesis there,
that there is fewer suicides, but more
suicidal
ideation?
That is what the data seemed to suggest,
and I am confused by that.
34
DR. TEMPLE: Can I make another comment?
The studies you are looking at are all
the
short-term studies. As Tom was pointing
out, we
have none of the long term sort of
relapse
prevention data. It seems entirely possible that a
drug could be causing early suicidality,
but once
you are over that period, it prevents
relapse,
which could have an impact.
You know, there is just
literally no way
to sort that out with present data. I mean it has
never been my thought that any benefit
these drugs
have consists entirely of their treatment
of the
acute episode, because in adults anyway,
we have
lots of data showing that the likelihood
and timing
of relapse is affected by continued
therapy.
As Tom said, most of those studies go
earlier than you would like to do in a
pediatric
population, because they consistently
show that
quite reliably. Maybe that is where their
importance is, it is very hard to know.
DR. GOODMAN: Dr. Pine is next.
DR. PINE: I have a question about some of
35
the regulatory options. In thinking both about a
number of the comments that were made
yesterday, as
well as your comments at the end about
how
difficult the decision that we will have
today,
related at least in part to the dearth of
data that
we really need.
Are there any options from a
pharmacovigilance standpoint as far as
regulatory
actions that might increase the degree to
which we
are focusing over the next time period on
the
emergence of these events or bring, you
know, new
data over the next months to years based
on a
regulatory action?
DR. KATZ: There is the mechanism of Phase
IV requirements that say we can impose
requirements
on sponsors to do various studies in
Phase IV and
postmarketing environment. The question would be
what those studies would look like. I think that
is the question.
There are other obviously
entities, the
NIMH and others who were set up obviously
to do
large trials, and again the question is
what would
36
those trials look like. You could do I suppose
large long-term, and again, you have
heard, I
think, a lot of people say that there is
a need for
long-term data.
I suppose you could do
long-term
comparative trials, you can't do
long-term
placebo-controlled trials, so other than
the sort
of randomized withdrawal design I think
that Tom
talked about.
So, there is a mechanism to
require
studies.
DR. PINE: I guess I am not so much asking
about studies, and this maybe is a bit of
an unfair
analogy, but in New York, for example, as
well as
other states, whenever you write a
prescription for
a psychostimulant, there are a whole host
of
procedures that kind of go with that,
that are
designed to allow monitoring of the use
of
psychostimulants and the associated
effects.
Is there any--again, I realize
I am
thinking a little bit out of the box--is
there any
form of, I don't know, computer based or
monitoring
37
system that might give us a better handle
on how
many of these events are actually
happening in
regular treatment?
DR. TEMPLE: ODS should comment on that,
but it is worth just looking at, say, the
study Dr.
Jick tried to do. There isn't any
no-treatment
group in that. He is just comparing the risk with
one group of drugs with another, and you
can
definitely do studies like that, but if
you tried
to compare treated people with untreated
people,
there will always be the concern of
whether the
groups are fundamentally different, a
very
difficult problem because people are
treated.
There might be environments in
which
treatment is not so common, where there
is less
likelihood to treat. Maybe in those environments,
you could do something like that, but
Anne wanted
to talk.
DR. TRONTELL: Just to expand briefly, you
are talking about using observational
data as Dr.
Temple pointed out, where you don't have
a control
group, and although you might register
patients, we
38
have seen even in clinical trials that we
have been
discussing this past day, that the issue
of
ascertainment of these events is very
complicated
when you actually have a clinical trial
mechanism
in place to capture those events.
The other challenge that you
face with
observational data, because people don't
receive
the drugs randomly, there is a phenomenon
called
"confounding by indication," in
fact, some of your
sicker patients you might presume are the
ones who
are getting the medication.
We try and control for that,
but it is
very complex. I think the better option is to
think of some systematic way, and then
you are in
the realm of studies, as Dr. Katz was
saying.
DR. MURPHY: I just wanted to follow up on
one last thing. Because we already know that using
the system we have now for follow-up
post-exclusivity because it is already
mandated
that we do one-year reporting once these products,
whether they are approved or not, so we
are looking
at all-use.
39
We do look at that and we
report that, and
we know that that is not going to inform
us, you
know, to answer the questions we need to
answer,
because of all the things that will
impact that
reporting.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I just wanted to mention one
related, but not quite on-point
matter. We talked
yesterday about concern that the studies
that had
been done to gain exclusivity might have
been not
as good as we would like.
We weren't particularly talking
about the
design of the studies, which we think is
okay, but
let's say the approach to them. Maybe there was
too much of a rush, and so on. If we were to put
out a written request now, it would be
one that
required a third arm to the study,
namely, a Prozac
arm, because we know that Prozac can be
shown to be
effective.
So, the study wouldn't count
unless it had
been able to show that it had what we
call "assay
sensitivity," the ability to tell
effective drugs
40
from ineffective drugs. We couldn't do
that before
because there wasn't anything at the time
we wrote
those requests that was known to be showable
in
children, but now there is. There is three studies
that all seem to show something.
So, we should have much better
information
about what the pediatric population does
in future
requests.
That doesn't help the present
discussion.
DR. MURPHY: I wanted to address that
issue again, too, because I think I want
the
committee to be very clear on the fact
that the
Agency tells the company very clearly the
type of
studies that need to be done.
We do give them, you know, a
broader
picture of the number of patients. We tell them
what we know will be the minimum, and, in
general,
I think Tom would agree that most of
these studies
have come in with the numbers in each arm
that we
have seen in other studies where they
have shown
effectiveness.
So, the point here being that
we do have
41
control over the types of trials that are
done, the
number of patients, and the
monitoring. However,
because there is a template up on your
web that
basically tells you what we ask for in
depression
trials.
When you look at what the
safety is, as
has been pointed out many times, these
trials were
not set up to answer that question. So, I think it
is those kinds of issues that we would
like to hear
more about today. As Dr. Temple said, it is how
better to do these trials in the future.
Thank you.
DR. GOODMAN: Thanks for that statements,
Dianne. I just want to make sure I
understand it
completely.
I think what you are saying, that if the
conditions had been different at the
time, that is,
that the drug company was required to
show, not
only have a study, but a study that was
positive.
Then, the design would not have been any
different,
the sample size would not have been any
different
under those circumstances than the ones
that
42
existed at the time.
DR. MURPHY: I think what we are saying,
that for the trials that we designed,
they were the
same for the one that did show some
effect, which
is Prozac, as those that did not, and
that what we
don't know is if a company is putting a
trial
together, and let's say we said that they
had to
have 300 patients to get their
exclusivity, but for
other reasons they really wanted this
product
approved, and they felt the enrollment
was not
going the way that they needed, would
there be some
other push within that company to then go
out and
get more patients, so that their
enrollment would
be better versus an exclusivity where all
they had
to do was meet that criteria.
I am making that number
up. I think the
issues that people were trying to get at
is that is
there a difference that affects behavior
when you
just know you have to do certain things
versus you
have another goal, which may be approval.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: The requirement for a third
43
arm in evidence of assay sensitivity
leaves it up
to the company to decide how they are
going to do a
successful study. They can look at the available
data on Prozac and say, oh, here is the
number I
need, here is the kind of patients I
need. That
succeeded in those three trials.
They would then know that the trial would
have to be one that can show the
difference between
Prozac and placebo. That doesn't mean their drug
has to show a difference between drug and
placebo.
That would be determined by the
results,
and there is no obligation that the drug
be
successful, but we would at least know we
had a
study that was capable of detecting
effective drugs
and distinguishing effective drugs from
ineffective
drugs.
That would then become a
requirement for
meeting the terms of the written request
because
they would have to show that they had an
adequate
study.
Before there was an effective drug, there
was no way to do that. You couldn't tell whether
the study was a good study or not.
44
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: If I could go back and
address the question of what would the
hypothesis
be for long term, certainly, in the
absence of
data, there is some degree of
speculation. I do
have a question directly to the FDA. Is it okay if
I respond?
I think the number one
hypothesis would be
in the short run when you have depressed
patients
who are not yet stabilized, you may see
an
increased risk, and you do see certainly
in this
population an increased risk of
suicidality.
I imagine that what we would
see with
longer term data is a substantial
decrease in
suicidality over time, and that is what
we are
inferring from the cohort and the
epidemiologic
data.
I think that clinically makes sense, as well
as mechanistically makes sense.
The question for the FDA, can
you give us
a sense, I mean do we feel confident that
we
actually have all the available studies
now in both
children, adolescents, as well as in
adults, and
45
what is the FDA policy on requiring
review of those
studies including negative studies, when
do they
come to you and when do they become publicly
available?
DR. TEMPLE: Well, let me start, others
can comment. When you submit to us an application
to change the labeling, to add a claim,
say, for
pediatric use, you are clearly obliged
under the
law
to provide every study, successful ones,
unsuccessful ones, things that were
interrupted,
and so on.
As far as we know, we are
getting all
those studies. Of course, if there were something
that were done that we didn't know about,
well,
then, we wouldn't know about it, but as
far as we
know, we are getting them all.
So, most of the pediatric
submissions to
us were associated with labeling requests
or
something like that, so as far as we
know, we have
all those data.
Dianne can tell you what is
required under
the best BPCA, and I think there, too,
they have to
46
provide them. We have no rule that affects whether
people have to publish results. Congress is
considering that, so are the journals and
everybody
is talking about that.
Under BPCA, however, when we
grant
exclusivity, we provide summarized results,
and we
have done that for the drugs where the
written
requests were written after the BPCA, and
we have
gone back and asked the companies for
permission to
summarize our analyses for all of the
others where
it wasn't totally clear whether we could
do it or
not.
So, the summarized result, that
is not the
same as a complete study report, the
summarized
results are now available publicly on all
of those.
I am sure between PhRMA's commitment to
provide a
registry between the journals insistence
that they
will get a registry, between
congressional
interest, I am quite confident that there
will be a
change in the way things get published.
DR. MURPHY: The only thing that I could
add to that is that for the committee,
for the
47
routine practice within FDA, if a company
submits
an application, we review it, the studies
are
negative, there is no public
acknowledgment of that
unless the company for some reason wants
to make
that knowledge public. We are not allowed to
comment on that.
Now, under BPCA, it said, it
has a
disclosure section that says you, FDA,
will
publish, as Dr. Temple is referring to,
the
summaries, the medical and pharmacology
summaries
up on the web--make them public, and actually,
we
have chosen to do that on the web--and we
have done
that.
One of the issues that has
happened is
that between the enactment of the new
legislation
and the old legislation, legally, things
were
considered issues under the old
legislation, so
even though the studies came in, we had
to reissue
all those written requests to be able to
say they
now were subject to this new mandate.
So, what again Dr. Temple was telling
you
is that unfortunately, many of the
antidepressants
48
came in, in that period when we had not
yet issued
that letter, but despite that, we have
asked the
sponsors to allow us to put those summaries
up, and
they have given permission to do so.
That is why yesterday we said
up on the
web now are the summaries. Again, this is not the
data.
There is variations in, you know, some
medical officers will put in more
information than
others in how much data is in these
summaries, but
they are up now, publicly available.
DR. MARANGELL: Is that true for adults,
as well?
DR. MURPHY: No, adults are still under
the same standard. In other words, if the study is
negative, we don't talk about it.
DR. MARANGELL: So, as an example, if an
antidepressant manufacturer did a study
in a new
indication for a drug that is currently
available,
found increased risks of suicidality, no
one would
be under any obligation to make that
public?
DR. MURPHY: That is a different issue.
DR. MARANGELL: But that is the question.
49
DR. MURPHY: The issue is safety, and the
Agency always has the ability to make
public safety
issues that arise.
Bob, do you want to say anything else
about that?
DR. TEMPLE: We consider, for example, if
someone with an antidepressant comes in
for, I
don't know, obsessive compulsive disease,
and we
don't buy it, we do not make those data
available,
they are considered confidential
commercial
information. Obviously, a lot of the people, a lot
of the public doesn't like that
approach. We think
that is what we are required to do. I can't
comment on that, I am not the lawyer
here.
However, companies have a
separate
obligation for drugs that are marketed to
report
serious and unexpected, and any serious
adverse
reactions to us, and to do so promptly. A finding
of increased suicidality where that was
not known,
clearly meets that test, and they would
be obliged
to report it to us. If we then thought that was
true, we would add it to the label or do
whatever
50
we are supposed to do.
So, safety data meets a
different
standard.
A new carcinogenicity study or
something, those do have to be reported
to us.
Other studies have to be reported in the
annual report, but they are not
necessarily
reported in detail, and not that much is
necessarily made of them, and they do not
necessarily become public.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: Yes, the serious safety
issue would have to be reported while the
trial is
ongoing to you, right?
DR. TEMPLE: Well, if it arises from a
trial, it has to be. Actually, the requirements
for reporting serious unexpected events
in a trial
are more or less identical to the
requirements
before a drug is marketed. They have to be
reported to us within 7 or 15 days.
A finding from an epidemiologic
study,
there is some judgment involved in
whether that
represents the kind of thing that has to
be
51
reported promptly, but they basically do.
DR. KATZ:
There is also some judgment
involved in whether or not an event is
considered
to be unexpected. So, for example, suicide in a
study of patients who are at risk anyway
might not
be reported to us in real-time, because
it might be
considered to be expected, the blind is
still
intact, you don't know if it's drug or
placebo if
it is in the context of a controlled
trial.
Afterwards, though, when the
trial is done
and analyzed, and it turns out that there
is an
increased incidence on drug compared to
placebo,
that is something we would find out
about.
DR. GOODMAN: Go ahead, Dr. Pollock.
DR. POLLOCK: I actually wanted to explore
your thinking a little bit about the
recommendation
for a maintenance trial. I guess there are a
couple of things. One is if there is this
acute
toxicity that we are concerned about,
clearly, it
doesn't address that because you are
dealing with
the children or the adolescents who have
actually
responded, and then are withdrawn.
52
But I wondered if there was
implicit in
your request for that, a concern that still that
the shorter half-life SSRIs seem to be,
maybe not
statistically, but certainly
qualitatively more at
risk in causing this phenomenon.
I was taking that as implicit perhaps
in
your suggestion, maybe I am
over-interpreting it,
but is there a belief that somehow--I
mean it just
seems more than coincidence that signals
seem a
little bit higher.
I know it has now emerged with
Prozac, but
certainly, Effexor, venlafaxine stands
out at one
end, then followed by paroxetine, and if
there was
kind of an implicit question that you
were asking,
assuming that people are still using
after we are
finished, you know, those medications,
that you can
require that those manufacturers actually
conduct a
serious maintenance trial as part of you
were
saying your Phase IV regulatory
requirement.
DR. LAUGHREN: We certainly, you know,
until we saw the TADS data, were
entertaining the
notion that discontinuation might be one
53
explanation for the bigger signal, the
apparent
signal that we are seeing with Paxil and
Effexor.
The TADS finding certainly
challenges that
notion as a unitary explanation, since
that is the
single trial among the 24 that, by
itself, has a
statistically significant finding for
that signal.
That doesn't mean that the other
explanation isn't
possible.
I mean this could be a much more complex
situation than one might seem at first
glance.
But a maintenance trial is not
going to
answer all those questions. I mean a maintenance
trial is only going to answer the
question of
longer term benefit, but the reality is
that many
clinicians, despite these concerns, are
probably
going to continue to use these drugs, and
we have a
dearth of information about what the
longer term
benefits are. The maintenance trial is one way, I
think, of getting at that.
Now, there is this issue of how
to
interpret emerging symptoms in that setting,
you
know, when you take patients off the
drug. Of
course, the drugs like Paxil and Effexor,
that are
54
known to have a stronger signal for
discontinuation, obviously are a
challenge in doing
that kind of trial, but I think that one
could, as
one does in clinical practice, taper
those patients
to try and address that, and then look
for what
would be considered for relapse.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: There is another reason to do
randomized withdrawal studies. As everybody knows,
in adults, the failure rate for
conventional
clinical trials of the acute episode is
about 50
percent.
That is, half the trials can't tell drug
from placebo, and that is true even when
you
include a third arm of a drug that is
known to
work.
That appears to be the nature of the beast.
Nobody really has a good
explanation
because if they did, they would fix it,
but we at
least think it has something to do with
the
environment and the discussions that go
on even
informally, even if it is not planned as
part of
the
treatment.
In the randomized withdrawal
setting, the
55
success rate for drugs that are known to
work is
nearly 100 percent. Very few of those
trials ever
fail.
There are at least two
reasons. One, only
people who seem to be doing well are in
the trial,
so they are enriched with a responder
population.
You can make of that what you will.
The other possibility, though,
is that the
environmental things that help people get
better
aren't really there, they are just out
living in
the community, there is nothing nurturing
about it.
They are just back in their usual environment.
So, one of the attractiveness
of these is
to find out whether the drugs actually
provide some
benefit, even in people who seem to be
doing well
on them, which seems an important
question here. I
mean, as Tom has pointed out repeatedly,
the
failure of most of the drugs to show
effectiveness
doesn't mean they don't work. On the other hand,
we don't have evidence that they do work,
and that
is not irrelevant either.
A good way to show that, if they do, is
56
the randomized withdrawal study. At least that has
been the history in adults, so there is a
lot of
attractiveness to it.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: Thank you.
I have two
questions. The first one is for Dr.
Murphy and Dr. Temple, and the second for
Dr.
Laughren.
The first question addresses the
exclusivity issue. I feel like in this case, we
bypass the Phase I/Phase II stages that
we would
normally go through with new drugs, so we
never did
do the pharmacokinetic/pharmacodynamic
dose finding
in children that we would have done had
these been
new drugs.
I wondered, I probably should
know this,
but could either of you explain, when we
offer
exclusivity with a new drug, if it is a
new drug to
children, do we require those studies, or
do we
not?
I am sure it is not that straightforward.
DR. MURPHY: We did required
pharmacokinetic studies. Actually, on the
template, we outline three types of
studies. They
57
have to do two randomized, double-blind,
placebo-controlled, acute treatment
trials with
recommendation at six to eight weeks for
safety and
efficacy.
They also are to do a pharmacokinetic
study to provide information pertinent to
dosing of
study drug, and they are to do a safety
study.
So, all of those were asked
for. Now, if
you are asking do we go back and demand
redoing
dose finding again in these, no, they
were not
worded that way. It was said that the PK study
could be a traditional PK or,
alternatively, a pop
PK, and actually, I don't think that the
study had
any other information that would have, in
essence,
told the company that they needed to redo
the dose
finding, if that answers your question.
DR. CHESNEY: So, do we have dose
information on all of these drugs? Do we know what
the usual ranges are, and what excessive
ranges
are, all those things?
DR. GOODMAN: Go ahead, Dr. Katz.
DR. KATZ: I think Tom mentioned this in
one of his slides yesterday. The written requests
58
that we issue now are very different from
the
written requests we issued that probably
generated
most of the trials that we are talking
about here
yesterday and today.
As Dianne pointed out, for
example, in
pharmacokinetics, we gave sponsors the
opportunity
to generate the kinetics in kids based on
so-called
population pharmacokinetic analyses,
which is to
say from data generated in the controlled
trials.
So, it was sort of after the
fact. It was
just what is the kinetics of the doses
you happen
to give in the trials.
In the earlier written
requests, it was
sort of the pediatric drug development
was sort of
tacked onto the adults, in other words,
when the
trials were designed even, the treatment
effect
size, for example, was used to calculate
sample
size was taken from the treatment effect
size seen
in adults. We had no information, even preliminary
information in kids.
So, we didn't have a lot of
preliminary
information in those days that could
inform
59
adequate trial design in this population,
in this
setting.
Nowadays, we ask for different
things. We
ask for formal PK, so we can learn before
the
definitive trial design, what the
kinetics are,
what doses give rise to what plasma
levels. We ask
for dose finding studies, so we can
determine
before we design the definitive trials
what the
tolerated dose range is.
So, the written requests are
much
different now than they were at the time
that the
requests are generated, these data were
written.
DR. MURPHY: Just to reinforce that is
that these were some of the earliest
written
requests that went out, so they really,
as has been
stated, and I think we tried to say this
earlier
on, we are learning.
I mean because of the lack of
prior
research and some fundamental scientific
questions
haven't been answered, we are learning
from the
trials that we have now about how to do a
better
job on designing some of these trials,
but these
60
were some of the very earliest ones that
were
issued.
DR. CHESNEY: Dr. Temple, did you want to
comment on that?
DR. TEMPLE: Well, I just wanted to say
there isn't any pharmacodynamic measure
to allow
you to do what is called PK/PD other than
effectiveness itself. In a lot of cardiovascular
settings, there is at least something you
think
relates to the desired effects, so you
can do
relatively short-term studies and get a
PK/PD
relationship.
Here, your only way to do it is
to insist
that every drug, every study be a dose
response
study, which is of considerable
difficulty. We
have trouble getting really good data
even in
adults actually given the sample sizes
involved,
but there isn't any measure yet. Maybe one of
these days there will be an MRI
measurement or
something, but not yet.
DR. CHESNEY: Well, I don't want to
overstay my welcome, and I do have a
question for
61
Dr. Laughren, but one does wonder about
some of
these children who didn't even express
ideation and
just suddenly, very early on, if they
didn't have
excessive levels. I guess that is one issue I was
getting to.
Dr. Laughren, I wanted to come
back to the
point Dr. Pine was making. I thought Dr.
Reisinger's point in the open session
yesterday was
a very interesting one, which is that you
would
have to undergo some kind of
computer-based
learning program or some kind of program
that
authorized you to prescribe psychoactive
drugs.
Certainly, we have to do
computer-based
CBLs for all kinds of things in our hospitals
and
in other areas nowadays. That had a real
attraction to me, and I guess the
question is what
kind of authority does the FDA have in an
area like
that, can you say that anybody that
prescribes
SSRIs must do a computer-based learning
program on
line, or is that something that the
professional
societies take on?
You offered several options,
black boxes,
62
revised label warning, but is this a
potential
option?
DR. TEMPLE: We can certainly recommend
things like that. Every labeling for a cancer drug
says that this should only be used by
people who
are trained in oncology. That comes with
no
enforcement on our part except that
people may be
anxious about the consequences if they
don't have
that training.
A labeling recommendation is
certainly a
possibility. A step further to limit the drugs to
people who have been given that way,
those are very
iffy questions, and it is not clear
whether we can,
in fact, do that. There would have to be a debate
about it.
There are some examples of fairly
interventionist activities. As you all know, you
can't get clozapine unless you have a
white blood
count, so no blood, no drug.
There are not a whole lot of
other
examples like that, but there are other cases
where
patients must be given a form that lists
what some
63
of the adverse effects might be, and
things like
that.
You have to weigh the risk you are concerned
about with the burdensomeness to the community and
to the medical profession of those kinds
of
interventions.
Putting something in labeling
about what
you should know doesn't carry those kinds
of
concerns, so if something sensible,
suggesting that
people ought to be trained in a certain
way seemed
like a reasonable thing, we could
certainly
consider that.
DR. TRONTELL: I would just like to add on
to Dr. Temple's comments, because the FDA
regulates
drugs, but doesn't regulate the practice
of
medicine, and we walk a fine line in
terms of
dealing with some drug products where we
may feel,
as with clozapine, that only very tight
controls on
prescribing and dispensing and use of the
product
are allowed.
There are a very small handful
of drugs,
they tend to be the exception rather than
the rule,
where training has been required as a
condition of
64
approval.
One product in particular is the drug
product dofetilide, where, in fact,
training is
required for pharmacists or
clinicians. There is a
highly structured way in which that
product can be
used.
Again, those have tended to be
reserved
for situations where we feel the drug
cannot be
safely used without that very high level
of
precaution. It is extremely difficult to put those
in place for products that have already
been
marketed and used by professionals.
DR. CHESNEY: The public sees your role I
think in a much broader perspective, as
we heard
yesterday, and I think that is something
that is
useful to clarify as to where your limits
are. You
mentioned there is a fine line, and I
think that is
what we are all looking for, is where
does your
authority end and that of prescribing
physicians
begin, I guess in a sense.
DR. TRONTELL: I don't think we yet have
an answer. I think we always have the authority of
our agency and hopefully, our ability to
persuade
65
individuals, but I think that the actual
legal
authority to do some of these is a matter
of debate
within and outside of the agency.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: I would like to return to the
topic of the incentives on the part of
industry to
perform well-conducted trials.
There has been a lot of
discussion about
the evolution of the written request and
about the
improvement with three-arm studies and
changes in
the ability to request that, but my
understanding,
I am interested to know if this is
accurate, is
that there is still two potential
linkages that
don't exist that might decrease the
incentive to do
a well-conducted study, and that is,
absent safety
concerns, there is no tie to putting any
efficacy
information in labeling, so that they
receive
exclusivity if a labeling change occurs.
Second, is that there is no
link of
exclusivity to a well-conducted study
unless that
has changed with written request, since I
read them
on the current web site, there is one
asthma study
66
where there was members of the drug group
that had
no drug level, members of the placebo
group that
had measurable drug levels, and the FDA
concluded
that the data was uninterpretable, but
nevertheless, exclusivity was granted.
I am wondering, is that a
problem with the
written request that is now fixed, or is
there
other solutions that would need to be put
into
place, such as legislation, to address
those two,
what I perceive as gaps.
DR. MURPHY: I think there was significant
discussion about how exclusivity should
work,
should it be only if the product is
approved. I
was not privy to those discussions, but I
know they
occurred.
The reason for why it was put
in place the
way it is, I can't give you, Dr. Nelson,
but I can
tell you that one of the explanations I
have heard
is that there was such little data, and
FDA was
given the authority to define the trials,
so again,
as you have heard, we would like to
improve, and we
know we have to learn from what trials we
have,
67
that by providing FDA the authority to
define the
trials, that they hope that the trials
would be,
you know, of the best that they could be,
and that,
therefore, we would learn from the trials
even they
were failed, because that is important
information,
failing is important.
So, I guess what you would say,
you are
asking if, and that is in a number of our
labels,
and that is a whole other discussion, but
in
situations, you know, we know that is the
only
study we are going to get and this is it,
failing
is put, that they failed to show
effectiveness has
been put in the label in a number of
situations,
and certain dosing or safety information.
As I said, about a fourth of
the time, we
are describing, even irrespective of
whether the
study is positive or negative, we are
finding
safety signals, you know, important
dosing
information, and we are able to put that
information in a label.
The intent is that the
information that is
obtained, whether the product is proven
to be
68
effective or not is important, and that
safety
information, et cetera, would be
obtained.
So, that is the best
explanation I can
give you as to why it is set up the way
it is right
now.
DR. NELSON: I understand, but let me
focus my question, I guess. Right now the efficacy
or lack of efficacy data is not in the
existing
labeling that we are discussing, so, for
example,
just to pick one, paroxetine, there is
five
studies, and the pediatric use just says
it has not
been established.
Although that is a true
statement, it is a
bit misleading because many people
interpret that
to mean the studies hadn't been done.
The other question is you could
ask them
to do a three-arm active control study,
but if they
do it badly, do they still get the
money? Even if
they have done it, if they do it badly,
do they
still get the money?
DR. GOODMAN: Dr. Temple wants to respond.
DR. TEMPLE: If the written request says
69
you need to do a three-arm study and need
to show
that the trial has assay sensitivity,
that is, the
ability to distinguish active drugs from
inactive
drugs, and the Prozac arm doesn't beat
placebo,
then, they would have failed to meet the
requirement of the written request.
We couldn't do that before, as
I said,
because we didn't have a known active
control, so
we wouldn't have known what to say. So, in that
case, the incentive to do a proper study
becomes
quite clear. If they don't do a proper study, and
succeed in showing that, they would not
get
exclusivity.
In other cases, we have
insisted that the
variance be such that for, say, a blood
pressure
drug, an effect size of 3 or 4
millimeters of
mercury could be detected, so if the
whole thing is
done sloppily and they could not have
detected such
a thing, then, they would not get
exclusivity.
Some of the other things,
however, that
you mentioned, don't have an obvious
remedy. I
mean I guess following the example you
said, we
70
could say, oh, by the way, people should
have blood
levels showing that they took the
drug. Well, we
hadn't been smart enough to think of
that, and
maybe that is something we should be
adding, that
is, some kind of compliance check.
That, I don't think has been
part of
written requests to date. That doesn't mean it
couldn't be. The test that Congress imposed is
that if you comply with the terms of the
written
request, you get exclusivity. That means if we
weren't smart enough to ask a question,
that is not
considered their fault, and they are
supposed to
get it.
DR. MURPHY: And we have denied
exclusivity where we thought the trials
were done
sloppily, and actually, sometimes when
the sponsor
said, well, we know you asked for this,
but we
didn't think it was correct to keep
going, so we
didn't do this for some reason, and we said,
no,
you should have come in and talked to us
about why
you weren't going to do it, you didn't do
it, we
told you, you need to do it, sorry, you
don't get
71
it.
So, what I guess we are trying
to say is
if it's really sloppy, and they don't do
what we
tell them, we deny them exclusivity. The problem I
think we are dealing with here is that we
all are
learning how to better do the trials, and
your
other question about whether that should
go in the
label, the negative information should go
in the
label, is a whole other discussion.
DR. GOODMAN: I have a list of seven other
committee members who wish to speak. After we give
them that opportunity, I am going to ask
Dr.
Wysowski to come up to the podium. We had asked
her to follow up on something from
yesterday. Is
there somebody else that has a
burning--we have one
more and that is it--two more, that's it.
Dr. Irwin. His question has been
answered.
Thank you.
Dr. Rudorfer.
DR. RUDORFER: Yes, thank you.
I would just like to revisit a
couple of
issues that concern me at the front end
of these
72
studies, and I recognize everyone from
the FDA is
pointing out that this is a learning
process, on
the other hand, we are faced with the
dilemma of
having these particular trials to deal
with.
The dosing question that was
just
discussed brings to mind a concern I have
related
to how the suicidal events we have been
looking at
were ascertained.
As I understand it, for the
most part,
these were from adverse events
questionnaires and
surveys.
Is that correct? I mean there was
no
particular suicidal scale?
DR. LAUGHREN: Well, all of these trials
included standard depression rating
instruments
like HAM-D or CDRS, and so forth, and
there is a
suicide item in each of those instruments,
and that
is part of what we analyzed.
But the problem is we don't
really know
how those were applied. My guess is that most of
the event data we are dealing with were
spontaneous
report or general questioning rather than
specific
ascertainment.
73
That is really one of the areas
that we
are trying to explore with Columbia to
try and work
on a more specific instrument for
improving
ascertainment for suicidality, but no, in
these
trials, I don't think ascertainment was
very
specific.
DR. RUDORFER: My question, as we deal
with these data, would be this. I appreciate the
very dedicated and elegant work that both
the FDA
and Columbia have applied to these
findings. The
question I have relates to the issue of
the active
drug versus placebo groups.
Since it sounds as if much of
the data
were spontaneous reports or I assume
perhaps
discussion between the raters and
subjects, or the
investigators and the subjects, I am
wondering if
part of this is not dependent on the
assumption
that the blind was kept intact throughout
the
studies, and I wonder if we have any
measure of
that or any sort of quality control on
that issue.
DR. LAUGHREN: No, we have no idea of
that.
That is typically not something that is
74
really ascertained. It is the assumption, but how
would you check on that?
DR. RUDORFER: In some studies, patients
and raters are asked at some point. I mean here, I
am just wondering if, in fact, if a
patient
volunteered that, for instance, they were
experiencing some side effects, they come
in, the
rater asks how are you doing this week,
and their
first comment relates to GI distress or
something
that sounds like a side effect, if they
simply
don't get more attention, in other words,
maybe
there is more discussion, maybe there are
more
questions asked as opposed to a patient
that comes
in and say, gee, I am feeling pretty
good, I don't
seem to have any side effects.
Again, that would not obviate
the fact
that if we find signals, then, the
signals are
present.
I guess I am just concerned about the
active drug versus placebo difference.
DR. GOODMAN: Let me interject. I don't
think I am as concerned about the
unblinding, but
your question raises at least in my mind
the
75
possibility that in the data, is it
possible that
we would see other somatic symptoms, more
side
effects reported in those patients, who
also
reported suicidality than in the opposing
group,
was there any attempt in the data to look
at
whether there were any other--was any
other
increase of adverse experience outside
the target
symptoms of suicidality in those patients
who
reported suicidality, the reason being
that if
there was, that would suggest it was part
of a
larger behavioral syndrome that was being
induced
by the medication.
DR. LAUGHREN: Our analyses had to be
limited by what we had in our database,
and we had
to design this database late last
summer. We
didn't anticipate all of these
questions. As it
was, the database we had was a very
time-consuming
process to put together. It took a number of
months to get it.
They are all good questions, but we
don't
have all those answers, but I agree that
ascertainment for suicidality was not
optimal here.
76
DR. GOODMAN: But the question is at this
point, could you go back to that same
data and look
to see if there is a higher rate of other
adverse
experiences reported in those patients
who were
also identified as experiencing or
exhibiting
suicidality.
DR. LAUGHREN: Not without designing
another database and going back to the
companies
and waiting for a number of months, and I
am not
confident enough in the quality of the
data we have
here that that would justify that
additional
effort.
I mean again, these are all
good
questions, but we are faced with making a
decision
at this point in time with what we have,
and we are
asking the committee's advice on what you
think we
can do now based on what we have done.
DR. GOODMAN: No, I agree with that, I
understand that, but we were also asked
what other
advice we would give in terms of future
research or
studies or data that we would like to
see.
DR. TEMPLE: Tom, we did look at the
77
association with certain kinds of things,
the
activation syndrome, things like that,
right?
DR. LAUGHREN: We included in our database
two other symptoms, hostility and
agitation based
on the preferred terms that the companies
used, and
again, we haven't looked, I suspect that
there is
variability across different companies in
what
actually got subsumed under those two
things.
There are the only two other
events, and
we don't even have the timing for
that. All we
have is an indication of whether or not,
at some
point during treatment, a patient
experienced
agitation or hostility. We don't have all the
other somatic kinds of things that you
are alluding
to.
That would mean going back and trying to
create another database.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: Let me just mention one other
thing that has come up briefly and that
Dianne
touched on, and that is inclusion of
negative
results in labeling.
As Tom has explained at the previous
78
meeting and now, as a general policy, we
don't
usually put in labeling the fact that a
study
hasn't worked, because we don't think
that proves
that it doesn't work. It just means that that
study failed.
But we are actively thinking
about that
policy for the pediatric part, because
the whole
point of doing the studies was the possibility
that
adults and children are different,
otherwise, you
wouldn't even think about doing that
whole program.
All I can say is we are actively thinking
about it.
It is not an easy to thing to
do, however,
because what you would want to say could
depend on
how good you thought the study was, and
then there
is the conundrum of what do you do if
there is one
study that says yes and one study that
says no.
That is virtually somebody a claim, which
we really
wouldn't want to do if it wasn't merited.
So, I am not going to suggest
that this is
easy, but we are reconsidering this whole
thing,
because the whole point of the Best
Pharmaceuticals
for Children Act is to find the data and
see
79
whether drugs work in children, and not
putting
anything in seems funny, so we are
reconsidering
that.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: Part of my question Dr.
Chesney eloquently asked before, but I
wonder if we
can get access to the wording that you
used for
cancer drugs as perhaps a guide to us for
our
considerations.
My other quick question, I
think back to
one of the FDA group is am I hearing you
right that
if you have a drug that has been shown to
be
efficacious in a particular indication,
that all
trials requested in the future require an
arm that
includes that drug?
DR. TEMPLE: I am not ready to say that
one would always do that, there are other
ways to
try to assure quality, but in this
setting, it is
reasonable to assert that we need to know
whether
your trial was an adequate test of
whether this
drug worked, and the only way we know to
be sure
that it is an adequate test is to have an
active
80
control, and to have that active control
be
distinguishable from placebo. Then, you know this
is a trial capable of showing things.
We have determined that our
future written
requests will include a requirement for a
three-arm
trial, because that's the only way we
know to be
sure that the trial is a trial that is
capable of
showing what the answer is, and we want
to be sure
we get the answer.
This comes up in written
requests all the
time, how much assurance do you have to
have and
how do you gain that assurance that the
trial is a
useful trial, and the reason it comes up
is the one
that everyone has alluded to, we don't think
people
are deliberately trying to mess things
up, but the
incentives to do a really good trial are
greater
when you have to win.
DR. PERRIN: I am a little confused. As a
clinician, you know, typically, if I am
looking at
a new medication, I want to know that it
is better
than current therapy. I mean all of us are really
interested in that.
81
There are a number of pediatric
drug
trials, not in the area of
antidepressants that I
am aware of, where new drugs come on the
market,
approved by the FDA, where there are only
drug/placebo trials, and not trials
comparing the
new drug with currently approved FDA
medications.
That is where I am confused.
DR. TEMPLE: Good question. There are two
possible uses for having an active
control. One is
where you want to compare the two
therapies. Now,
to do that, you would need a very, very
large
study, because you would be interested in
even
modest differences. That is not what we are
talking about.
We are talking about the use of
the third
arm to show something about trial
quality.
Actually, a third arm is extremely common
in
depression trials now, because if the
trial fails
to show that your drug is better than
placebo,
there are two possibilities.
One is that your drug is no
good, and the
other is that the study was no good, and
it is very
82
important to somebody developing a drug
to know
which of those two things it is.
If the trial shows that Prozac,
say,
works, and your drug doesn't, you get rid
of the
drug.
If the trials shows that neither Prozac nor
your drug works, you do another
study. So, it is
extremely important. But the two purposes of the
trials are quite different.
To actually do a comparison and
try to
detect a small difference, you would need
very,
very large groups. That is an unusual
thing for
people to do, and usually, the drugs
can't be
distinguished. It is very hard to do that.
DR. GOODMAN: Dr. Temple, I heard you say
before, if I heard correctly, that
incentives are
different when you need to win. Were you referring
to the conditions of the six-month
exclusivity
arrangement, and if you were, if the
incentives
were different at that time, would you
predict any
difference in the design of those trials
or the
conduct of those trials?
The reason, let me say, I think
that many
83
of us keep harping on this point, is not
so much
because we think that the suicidality
data would
have turned out differently. I think it
is the
absence of a benefit, the absence of
efficacy that
at least I am concerned about, because
that is
mostly what we have in assessing benefit
or those
trials, and we only have 3 out of 15 that
are
positive, so if there was something about
the
conditions in which those studies were
designed or
conducted that might have negatively
impacted the
outcome, I would like to know it.
DR. TEMPLE: Well, Russ and Tom need to
respond, but we haven't seen anything in
the design
of those trials as written in protocols
that makes
them look any worse than any other
trials. They
seem to have reasonable size, so there is
nothing
obvious.
But, you know, this is an issue
that comes
up when you do so-called
"non-inferiority" trials.
The incentive, you know, the point of
such trials
show no difference between treatments,
and as I
have written repeatedly, that is not a
good
84
incentive to give people.
It doesn't stimulate the kind
of optimal
behavior that you want, which is
stimulated by the
need to try to show a difference between
treatments, and that is a problem here if
you don't
need to win, to gain exclusivity, and I
don't
disagree with the idea that you shouldn't
need to
win, the point is to get the data. That is why the
BPCA was done that way.
On the other hand, you do want
a good
trial, and one way to guarantee that the
trial is a
good trial, however the drug comes out,
is to be
sure that it is capable of showing something
we
need to be true, namely, that Prozac
seems to work.
DR. KATZ: Can I just add? One thing you
need to remember about studies done in
response to
written requests is that they are very
time
sensitive, or at least it's possible that
they are
time sensitive.
What I mean by that is you only
get
exclusivity if your study reports, your
supplements
containing the data come in while you
still have
85
some residual patent life left or
exclusivity left.
So, they have to be done within a
particular time
frame.
In fact, the letters that we send, the
written requests include a date by which
the
studies have to be submitted.
So, in some cases, there is at
least
potentially motivation to do studies
rapidly, so
that they are done and study reports are
written,
and the supplement, which includes these
data, are
submitted in time, so that they can still
get their
exclusivity.
So, one at least potential
question that
has been raised is enrollment so rapid or
does it
need to be so rapid into these trials
that maybe
not all the patients are adequately
diagnosed, and
maybe they have something other than
depression.
It is very, very difficult for
us, if not
impossible for us, to be able to
independently
corroborate diagnoses in something, in
conditions
like these, so we, of course, take it on
faith that
they got the right patients, but maybe,
for
example, because of time constraints,
they didn't
86
get the right patients, and that might
contribute
to a negative finding even if the drugs
were
effective in a true population. So, that is one
possibility.
DR. GOODMAN: I think that is a fair
answer.
Anybody that wanted to comment
specifically on that? Dr. Marangell.
DR. MARANGELL: Are you aware, is there a
greater proportion of non-academic sites
in these
trials?
DR. MURPHY: I don't know that we have
looked at that. I mean I know that there are
definitely, in some of these studies,
very, you
know, academic sites that have been
involved in
numerous or actually well-known to us
investigators.
I do want to make one thing
again. One
thing that every division within FDA is
told, when
writing their written requests, they are
asked a
number of questions - what is the public
health
benefit, what are the trials to get to
that public
health benefit, and you are not to take
into
87
consideration--and most of the time they
don't even
know because you would have to go into a
lot of
patent law--they don't know or are told
to not pay
any attention to when the patents expire
or the
exclusivity marking would go out, they
must look at
it only from what are the trials that
they need to
have done.
Now, what is being told to you,
though, is
that--and we have written requests where
the
companies come back and say, well, that
is not
going to help us, because you put a date
on here
that it was due by 2007, and our patent
expires in
2005, and we have said, you know, we are
sorry, we
need these kind of trials.
Now, would, in that situation,
a company
try to compress by getting more sites or,
you know,
whatever, would they try to do that trial
in a
different way? Yes, possibly.
I mean that is what we are
trying to
explain the balance between the way the
process is
set up, it is not to be driven by the
time when the
patents are expiring, the marketing
exclusivity is
88
expiring, the divisions are to determine
what the
studies are that are needed to the best
of their
knowledge at that time. They are to design those
studies to answer those questions.
Do we try to be reasonable and
say, gee,
we would like a 10-year follow-up study,
but we
don't ask that for other--you know, we
have to be
reasonable within the realm of what we
would
normally ask for, for an approval
product.
Again, though, maybe we can
be--we say we
have to get this information because
children grow
and will go through a period where that
might be
effective.
DR. GOODMAN: Thank you, Dianne.
DR. MURPHY: So, you have to ask for
additional information, you might not,
for adults.
I am trying to explain the process.
DR. GOODMAN: I will accept some questions
out of order if they are on this specific
topic.
Dr. Rudorfer, I think you had one.
DR. RUDORFER: I just wanted to follow up
on Dr. Katz's comment about whether we
are looking
89
at the right patients, which was an issue
we
discussed some yesterday.
Just one point that I want to
follow up
on.
It is clear that in young people who present
with major depression, there is a
disproportionate
number who go on to develop bipolar
disorder, and I
think one concern that we expressed
yesterday was
that the trials are very inconsistent in
that
especially in terms of accounting for
family
history, it sounded as if in some trials,
a subject
could literally be brought to the clinic
by a
parent who has bipolar disorder, and yet
the child
could be included in the trial.
I realize this question might be, as we
said, a little out of the box. I would think that
if there is any way to encourage the
companies to
actually try to find some of these
thousands of
young people and see what has happened to
them in
the 5 or 10 years since they were in the
study, it
could be tremendously informative simply
in seeing
whose longitudinal course has played out
as what we
recognized in young adults as major
depression, who
90
developed bipolar disorder, who developed
some
other disorder, and go back and re-look
at, for
instance, those who after the fact are
confirmed to
have the diagnosis that we thought they
did on
inclusion.
DR. GOODMAN: Dr. Pfeffer.
DR. PFEFFER: Yes, I want to I guess
continue on what Dr. Rudorfer is saying,
because I
think diagnosis is critical, and I think
we can
learn something about this that we have
learned a
little bit about depression in other
realms, too,
namely, that children are, in fact,
different than
adults.
So, what appears to be adult
depression
and what appears to be childhood
depression may, in
fact, be quite different, so that perhaps
a lack of
efficacy in most of the studies tells us
something
about the nature of the developmental
course, first
of all.
I agree with what you are saying about the
potential for bipolar. That is one issue that is
crucial, I think, in terms of maybe the
adverse
91
response that children are having, but
also if we
think of the number who had some suicidal
thinking,
that also might be a subgroup of the
children who
are in these studies also.
The other part that I want to
mention is
that when I gave that talk last meeting,
I talked
about the complexities about what looks
like
depression in children, and not only
course and
family history, but life event
circumstances, and
that has not been looked at.
So, for example, children who
might have
been having immediate family turmoil and
looked
depressed, that is an issue that might
have led to
some resistance in response, for example.
The other point I would like to
make is
that we hear from some of our childhood
psychiatrist colleagues yesterday who
advocate to
not ban use of these drugs, because they
do see
efficacy, and it may very well be that in
their
practice, with very careful assessment,
careful
diagnosis, they are selecting the
subgroup of
youngsters who potentially could respond,
and
92
respond very, very well.
So, I think the question of
diagnosis is
crucial, which means that in terms of the
study
design, in a way, who has the most
reliability to
make a diagnosis, and what kinds of
questions
really are being asked and what data is
being
collected that might help us even look at
predictability of response, and I don't
think we
have that, such as life events, such as
family
history, such as perhaps other issues
that we would
need to come up with and understand.
DR. GOODMAN: Thank you.
Dr. Gorman.
DR. GORMAN: A lot of us keep saying that
children are different, and I don't think
it should
come to us, then, as a surprise that
children may
respond differently to medicines than
adults do.
I think I would be more
concerned about
the efficacy of these trials if they were
all
unidirectional in the sense if they had
all failed
or they had all succeeded. I have heard nothing
from the FDA to this point that says that
the
93
playing field has been tilted in any way
since one
of these drugs in this class, which may
not
actually be a class, but it seems like it
might be
a class, actually works for children in
the bar
that the FDA sets up.
So, I am now going to address
my single
question to the rushing hypothesis. After Monday
Night Football last night, I like the
rushing
hypothesis. There is one small question I have to
ask.
Prozac was the first mover in
this field,
therefore, I assumed it came to market
first, and
probably then had the least time before
its patent
extension. Is that a safe statement?
So, it came to market
first. Did it have
the smallest amount of time? It was the first to
go off patent, yes or no?
DR. TEMPLE: I believe it was the first
one to go off patent by a little
bit. It is off
patent now, and only, I don't know, are
any of the
others off patent? So, we know it was the first
off patent, which happened sort of a year
ago.
94
DR. GORMAN: So, that would run
counterintuitive to the rushing
hypothesis, because
Prozac had to get there first, and
therefore, seems
to have had the least time and would be
the most
likely to be rushed to get labeling.
DR. TEMPLE: Some of the trials were done
before this program even started, I
think, and they
were done a long time ago.
DR. LAUGHREN: One of the trials was done
by Emslie several years before, and the
company
obtained the data and submitted those
data as part
of that supplement. It was done in the early '90s,
though.
DR. KATZ: Right.
The studies that we
asked for in the written requests don't
necessarily
have to be done or initiated after the
written
request is written.
If they have a study that is
very old, but
that meets the criteria that we put into
the
written request, they can use that, so
they don't
have to be done specifically in response
to the
written request, they have to meet the
criteria
95
that we lay out, and it can have been
submitted to
us either before the written request.
But they could have done a
study many,
many years in advance before we even
contemplated
written requests. If they met the criteria, they
can submit it in response.
DR. TEMPLE: But, also, remember it's a
hypothesis. We don't know why those trials fail.
It could be that children really don't
respond. I
mean we don't know the actual answer.
DR. GORMAN: Well, I would love to be in
the position where I can say something
nice about
the pharmaceutical industry, because it
sometimes
seems to happen so rarely, but if Lilly
did the
trials before there was the potential for
financial
gain, because all they were doing was
looking for
labeling in children without the
congressionally
mandated reward for that particular
behavior, and
therefore had these studies in place,
maybe the
rushing hypothesis fails, but there is another
hypothesis that could be generated from
that.
DR. LAUGHREN: Again, in fairness, the
96
Emslie trial was funded by NIMH. This was not
sponsored by Lilly. They went back and obtained
the data, and they did subsequently an
independent
trial that also succeeded.
DR. GOODMAN: Dr. Newman.
DR. NEWMAN: I think Dr. Temple did a good
job of explaining why, if you have an
active
treatment arm, the trial is likely to be
of higher
quality when asked to demonstrate that
difference.
I wonder if another approach to
motivating
high quality studies would be to require
that in
order to get the exclusivity, that the
trial be
written up in a way that passes some sort
of peer
review and be published.
That way, even published on FDA
web site,
that way, if the trial is sloppy and
finds the drug
doesn't work, those results would not be
buried,
they would become public and that I think
would
provide some motivation to do a good job.
I am a little troubled. I wrote down a
quote from Dr. Murphy. It said, "If a study is
negative, we don't talk about
it." I think if
97
that's the case, then, there is a lot
less
motivation to do a really good job on the
study.
Why not require the studies be published,
be
written in a way that it is of sufficient
quality
that they can be interpreted, and then
maybe the
quality would improve.
DR. MURPHY:
But for peds now, we do.
That is the difference. That statement was for
adults.
For pediatric studies, well, I should say
it is for pediatric studies that aren't
done under
exclusivity, but for pediatric studies
done in
response to these written requests, we
now are
mandated to make them public whether they
are
approved, they are not approved, or even
if they
are withdrawn.
DR. TEMPLE: But you are also talking
about a level of detail in the presentation
sufficient for people to really get into
was it a
high quality study, and things like that.
DR. NEWMAN: Why not?
DR. TEMPLE: it is a fairly good
question.
We
don't believe we have authority to insist that
98
things be published. We get full details, we get
all the data.
DR. NEWMAN: But you could peer review,
you could peer review them. You could send them
out and say is this something that is
publishable,
and have people at FDA, who I am sure are
very good
at that, say no, this gets an F, you
know, this is
not good enough, send it back, or you
don't get the
exclusivity.
DR. TEMPLE: Well, our reviews, when we
approve something, you get on our web
site the
contents of our reviews, so you get to
see what we
thought of all of the studies. If we do not
approve, however, we don't believe we
have
authority to make those data public, so
you don't
get to see our reviews. That is our legal
interpretation of what confidential
commercial
information is, and I can't rebut it or
comment on
it.
It's a legal determination.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Just on that point, does the
FDA now have the authority, if you wanted
to, to
99
put negative studies in the pediatric
label, do you
have the authority or does Congress have
to do
something for you to get the authority?
DR. TEMPLE: We have authority. What I
was saying before is--and we are, as I
said,
considering whether in the pediatric
case, we
should do that. In other cases, we would, too, if
we thought it was important to point out
the
negativity, and the negativity was a true
bill.
It is just the fact that if one
study
fails, doesn't necessarily say that
something
doesn't work, so we have been somewhat
reluctant to
just do that until it was convincing.
But as Dianne said, we are
actively
thinking about amending that policy for
the
pediatric setting where the whole point
of getting
the studies done was to see how the drugs
worked in
children, for the very same things that
they have
been studied for in adults.
It is a little different from
novel use or
something like that. The BCPA calls for studies of
the exact same things that have been
studied in
100
adults.
DR. MURPHY: And we are putting negative
information in some of the labels already
for other
types of products, but because of the
complexities
that you have heard, it has been the policy
for
antidepressants for children not to do
that at this
point, but I think, as has been
mentioned, it is
being reconsidered.
So, we have, and I have got all
the labels
here that we have done, we are putting
that
information in some of these labels.
DR. POLLOCK: For the new approvals.
DR. MURPHY: No.
DR. TEMPLE: For where we grant
exclusivity.
DR. MURPHY: Right.
In other words, if a
product comes in and doesn't work, we
have put that
information in some labels where we think
it is
very clear-cut, you know, eight more
studies is not
going to change this for whatever reason,
and we
put that in here.
We have also put in information
where it
101
hasn't worked where there are safety
issues
involved, and we are not clear what those
safety
issues are, but we want to tell you about
them.
So, those are in the label, too, even
when it
wasn't approved for that indication.
DR. GOODMAN: Dr. Santana.
DR. SANTANA: I have a comment and then a
question that really relates to a point
that Dr.
Chesney made about issues regarding the
boundary of
practice and FDA regulation.
My comment is that there was
some comment
related to oncology and issues, how we
deal with
some prescription and safety issues in oncology,
and I think we have to recognize that
pediatric
oncology is unique in this country and
that most of
the trials, even the exclusivity trials,
of which I
have participated in some in oncology,
are really
under the umbrella of research centers
and academic
centers. Very little pediatric oncology
is done in
the private practice.
So, by force, you are now
dealing with a
group of individuals that are more
specific and
102
more geared up to looking at issues that
potentially could be relevant, whereas, I
think in
the other pediatric arenas that we are
talking
about, that doesn't occur.
So, I think it would be a
misnomer to use
pediatric oncology, maybe it should be
the gold
standard, but I think we need to
recognize that it
is kind of unique in the way it is practiced
in
this country.
Having participated in some of
the
exclusivity oncology trials, I can tell
you that
they are at the same caliber and at the
same
rigorous structure as any of our other
oncology
trials are in the cooperative group
setting, et
cetera, et cetera. So, that was just a comment to
clarify the pediatric oncology issue.
I want to get back to patients
and
practicing physicians, because we have
been talking
a lot about study design and how to
analyze data.
I want to get back to the issue of
patients,
parents, and practicing physicians, and
this
boundary of what the FDA can regulate and
cannot
103
regulate in terms of the practice of
medicine.
I was struck yesterday by many
of the
testimonies from parents and families,
and
actually, there was even a gentleman who
showed a
slide, in which his child was given the
medication
as a free sample. I am not sure that all these
whistles and alarms that we put in labels
are
really going to work unless somehow that
practice
stops for certain medications that we
think
potentially have a greater risk.
I wanted the FDA to address the
issue
historically. Is there any ruling that you guys
can impose or potentially think about,
about how
these medications are given without
prescriptions,
that is, either free samples or in the
marketing
world, so you could comment on that.
Secondly, does the FDA have any
historical
data on successful programs? There was a mention
that maybe a med guide to parents and
families
would be a way to address some of the
safety issues
and bring people to a better level of
understanding.
104
Can the FDA comment on any
successful
programs that they can point where this
has truly
worked?
DR. TEMPLE: Just on the free sample
thing, my understanding, but I don't
really know,
was that a physician did use a free
sample to, you
know, like start the child out. That is not
without a prescription, it may not have
been well
done and may not have had adequate follow
up, but I
am not sure that it is the free sample
that is
involved, it is the lack of follow up
that was
described that seems like the problem.
It is not easy to know how
successful our
various endeavors have been, and Anne
Trontell may
want to comment on that. Some of them have effects
that are not entirely what we
wanted. She
mentioned the program on dofetilide.
To start, dofetilide is a drug
that is
used to prevent recurrence of atrial
fibrillation,
but it is a drug that causes QT prolongation
and
Torsade de Pointes, and there is no doubt
about it.
The recommendation in labeling,
and it is
105
enforced by the need to give out various
information requires that you come into a
hospital
or outpatient facility for a couple of
days to see
what your creatinine clearance is and to
see
whether you are a person who has QT
prolongation to
an excessive degree.
Then, after that you can go out and be
treated with it for long-term use in
preventing
atrial fibrillation.
What appears to have occurred
is that that
is sufficiently difficult, so that people
instead
use sotalol, which doesn't have such a
program, or
quinidine, neither of which are an
improvement of
the situation.
So, people can avoid some of
these things
if they are inconsistent across the drug
classes,
so you always worry about that.
There is a very rigorous
requirement for
periodic measurement of liver tests with
a drug
called Bosentan, which is used for
pulmonary
hypertension, and although the drug was
quite toxic
when it was being developed, my most
recent
106
information is that we haven't had any
fatal liver
outcomes, perhaps a testimony to the fact
that
people are indeed following up these
patients.
Of course, this is a class of
patients who
are very sick and very closely
watched. You don't
know if that is typical how we are going
to do.
Anne, you want to comment on
some of the
other programs.
DR. TRONTELL: Sure.
On the issue of
sampling, first of all, I think in some
instances,
at the time of product approval, there
have been
informal agreements, but no FDA authority
to
restrict sampling exists to my knowledge,
but there
may be agreement, you know, certainly, we
don't
sample oncology drugs. There are things that just
don't happen.
On the issue of what is a
successful
program, I think we struggle in the
agency, because
good evaluations have not been done on a
standard
basis.
We have the best information for those
programs that are most restrictive,
programs like
clozapine or programs like the one for
thalidomide
107
to prevent pregnancy exposures.
So, the available data to us to
tell us
what works tends to be only in those
extreme cases
where we have put, as Dr. Temple just
described,
for Bosentan, you know, very severe
restrictions.
If you are asking for specific
information
about medication guides, I think we have
in the
general literature evidence to suggest
that good
education certainly facilitates good
behaviors, but
I don't think we have any evidence yet
that it
guarantees that they do take place.
So, if you had questions about
the
intermediate ones, I think for the most
part, we
don't have information about those
specific
educational programs or the reminder
ones. Not
uncommonly, education is applied in the
context of
these very restrictive programs that I
just
described, and again, teasing out what
the
education alone does is very difficult.
DR. GOODMAN: Dr. Katz.
DR. KATZ: You are hearing the
difficulties that we think we have with
regard to
108
imposing various sorts of restrictions
although
again, there are ways to do it although
they may be
very difficult to implement.
But it occurs to me that it
might be
particular difficult in this case because
the use
we are contemplating in all but one case
is off
label, and I don't even know what the
implications
of that are. Certainly, there are legal questions
about what you can say and what you can
restrict
with regard to off-label use, and I don't
think
that we have thought through all the
implications
of that.
DR. SANTANA: So, as a follow up to that,
since we last met in February and there
was a
recommendation to do something with the
label that
occurred and some warnings, has the
Agency
monitored the change in practice?
I heard a number yesterday of
10 percent.
That is prescriptions, but has that been
rigorously
looked at, that there was an impact of that
modification that translated to something
very
tangible?
109
DR. TRONTELL: I will ask either Michael
Evans or Judy Stafford from the Office of
Drug
Safety.
All we have really been able to monitor
since the last advisory committee is
volume of use,
but they do have some information on how
that has
changed recently.
DR. GOODMAN: Ms. Griffith.
MS. GRIFFITH: I would just like to pursue
this for a moment with respect to the
patient and
physician relationship. When Dr. Chesney was
proposing perhaps some sort of a
computerized
programming or education, or even with
respect to
these med guides, when Dr. Temple
suggested that
perhaps there would be, you know, a
mechanism much
like you have for other drugs, that the
patient and
practitioner would be signing a consent
form
outlining the risks and benefits, I want
to
understand the reason that you thought
that that
might be too great a deterrent to pursue,
simply
because from my perspective as patient
rep and
parent, it seems to me that in the course
of any
treatment process for any severe illness,
which as
110
we all understand depression is, you are
often
asked to look at the risks and to sign
some
statement to the effect that you
understand what
these risks are.
You even have to do that if you
get a shot
of botox, not that I know, but it just
strikes me
you have put the parents now in the
position of
actually doing the risk-benefit
analysis. That is
where we all are.
If by providing the families
with the
statement that these risks are indeed
serious, I
think that what we heard yesterday was how
little
awareness there was on the part of the
parents that
these drugs could be lethal in certain
cases.
I am arguing for more
information rather
than less, not more restrictions, and I
agree with
the point that Dr. Santana made, that how
often
does a parent either open the box and
read the
information or understand it.
So, if it is very clearly
stated between
the doctor and the patient or the parent,
I think
it goes a long way to satisfying the need
to know
111
for parents.
DR. TEMPLE: There are gradations of
information, and we wrestle with how to
do that
without being an attempt to be
informative, but not
disruptive, so that, for example, a lot
of drugs
have what are called med guides. These are patient
labelings that are actually, under the
law,
supposed to be given out by the pharmacist.
My own view is that if you
don't make it
part of the unit of use package, you
might as well
not bother, but in any case, we know that
there are
ways to get that information to patients
either
through the proper functioning of the
pharmacy or
by making it part of the package.
An enormous additional step,
which has
been done in some cases, but, you know,
thalidomide
is a level of risk that is sort of in its
own
category, where there is a requirement
that the
patient and physician discuss all these
matters.
That is a very huge step, and what you
might think
is reasonable for thalidomide, something
that is
used infrequently, you might find more
disruptive
112
than you want or more difficult than you
want for
drugs that are much more widely used.
As Russ pointed out, it is
particularly
tricky when the recommended use isn't
even in the
label.
How to write a med guide or something like
that for something you are not really
recommending
and don't feel able to recommend yet,
that may
sound like a bureaucratic worry, but I
think it's a
serious worry.
You don't want to warn people
and
simultaneously recommend a use that you
don't think
is recommendable, and any discussion like
that is
tantamount to recommending the use. So, we will
need to worry all of those things based
on your
conversation.
MS. GRIFFITH: Could I follow up? I
understand that and I understand that
there are all
sort of issues involved, liability on the
part of
the physician, but I am suggesting, from
the naive
perspective of the parent, I think of
depression as
every bit as serious as the use of
thalidomide
posing birth defect risks or, as Dr.
Santana said,
113
you know, the cancer example. Parents need to be
informed about those risks.
I don't think that this is any
different,
frankly, and if it is an extraordinary
measure to
take, I think that it benefits both the
practitioner and the patient parent.
DR. TEMPLE: For oncologic drugs, the
label says you should be a properly
trained
oncologist. There isn't anything in there that
says what you need to discuss. Patient med guides
for oncologic drugs is by far the
exception, I
think because it is assumed that there
always has
to be such a conversation in the course
of therapy.
I guess what is being discussed
is whether
there is a common practice of having that
kind of
conversation in someone who is depressed,
and
obviously, we all think that there should
be such a
conversation. The question is now to induce it and
what to provide people to help them be sure
they
ask the right questions.
DR. GOODMAN: We have a representative
from the Office of Drug Safety at the
microphone.
114
Could you please state your name?
MR. EVANS: Michael Evans with the Office
of Drug Safety.
With regards to drug use,
comparing the
first six months of this year to the
first six
months of last year, the market rose with
all ages
about 7 percent. Adolescents and children, in the
first six months of the year, still
comprised
between 7 and 8 percent of that
total. So, they
are still widely used in children.
DR. GOODMAN: How up to date is that data?
There must be some sort of lag time,
isn't there,
between when the prescription--
MR. EVANS: It is according to IMS Health,
and this is January through June is what
we looked
at.
This is outpatient prescription data, which
comprises about 45 percent of all
pharmacies in the
country.
DR. GOODMAN: Let me make sure I
understand. You don't see any significant drop?
MR. EVANS: No. I believe a woman
mentioned yesterday that they saw a 10
percent
115
decline.
We did not see that.
DR. GOODMAN: Dr. Irwin.
DR. IRWIN: Has the rate of
increase
remained the same or has it leveled off,
or what is
the direction?
MR. EVANS: In February, one of our
colleagues, who gave drug use for 2002,
that age
group was still 7 to 8 percent of the
total. It is
still the same this year, first six
months.
DR. GOODMAN: So, there has been no great
change.
I will take again other
questions out of
order as long as they are directed to a
representative from ODS.
Dr. Marangell.
DR. MARANGELL: Actually, a comment
directed to this. I think it is really critical to
this discussion that we keep in mind that
our goal
is
to protect risk, but also that this is really a
devastating illness, and I am not sure
that I
necessarily--I don't want to necessarily
see
prescriptions drop. These people need to be
116
treated.
What we want to do is make sure
that
people are educated of what to look for
early on in
terms of risk for those people that are
at risk,
children or otherwise. They are not necessarily
the same thing .
DR. GOODMAN: Other questions for our
speaker?
Dr. Gorman.
DR. GORMAN: Is the data on the level of
the class or is it on the level of
individual
drugs?
MR. EVANS:
We looked at the class as a
whole and then we looked at each
individual drug in
the class. That was according to IMS Health
National Prescription Audit, and we also
looked at
the National Disease and Therapeutic
Index from IMS
Health, and tried to apply those
percentages to
outpatient projected prescriptions.
Only the players changed in
that age group
of children 1 through 17. Paroxetine was knocked
out of the top five, but sertraline still
is the
market leader, followed by fluoxetine.
117
DR. GORMAN: So, the information, there
seems to at this point only be one drug
that is
efficacious in this age range, moved it
up the
ladder, but didn't make it number one?
MR. EVANS: Not necessarily. This is what
we observed when we were just looking at
drug use
in prescriptions outpatient, and the
National
Disease and Therapeutic Index is an
office-based
survey where a drug is mentioned during
that survey
and linked to a diagnosis.
DR. GOODMAN: Can you differentiate
between the prescriber classes, whether
it is a
primary care physician versus
psychiatrist?
MR. EVANS: We did look at specialty in
MBA-Plus.
Psychiatry was still about 65 percent of
the specialty, pediatrics, somewhere
between 15, 20
percent still.
DR. GOODMAN: Dr. Fant.
DR. FANT: Could you comment on the
indications for the prescription, was it
all
depression or other off-label--
MR. EVANS: We looked at mood disorders,
118
anxiety disorders, ADD, and other
disorders. In
age group 12 to 17, it still appears
there is not
really any change. It is still mood disorders,
which includes major depression, is still
two-thirds of the indications.
It looks like in the 1 to
11-year age
group, perhaps more shift to the ADD.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: I heard rather consistently
yesterday a lot of concern about the
direct-to-consumer advertising and the
role that
that has played in this, and it may not
be the
purview of this committee, but I am
asking if we
can address this aspect and how that
plays with the
implications of labeling, that if we do
put, as was
suggested, a specific negative label in
terms of
the indications and certainly as a
warning, let
alone a black box warning, that the
amplitude of
these warnings are heard.
I mean it is almost a penalty
then for the
intense direct-to-consumer advertising,
which does
play, as I understand it, a huge role in
driving
119
sales for some of these antidepressants.
I just wondered if you could
give us some
indication, I mean is there a direct
policy with
D.D. Mack how these various gradations
get
translated into the few seconds that go
on the tail
end of a commercial.
DR. TEMPLE: They are certainly supposed
to.
The presence of a strong warning or box
warning should be reflected right in the
major
statements that are made. The direct-to-consumer
comes in two flavors, written and TV.
In TV, you can't give as much
information
easily, but it has to be available
readily. You
can argue about whether people make use
of that
availability. But the major statement would have
to reflect the balance between those two
things.
You know, I am sure people have
views
about whether that is done successfully
or not. If
it is written, then, the written statements
have to
show that balance. Any box warning has to be
reflected in it.
So, yes, it is supposed to
reflect the
120
balance of information that is in the
labeling, so
if the labeling changes, the
direct-to-consumer
advertising should change.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: Yes.
Back to the ODS person.
A number of the anecdotes yesterday suggested
that
people were put on antidepressants quite
off label
and probably not for major depression,
but rather
for minor depression and acute
depression.
You said that you have the
evidence on
mood disorders that includes major
depression. Can
that be disaggregated at all into other
non-MDD
forms of mood disorders?
MR. EVANS: We could look at that. We
didn't, we lumped them together just for
a top-line
statement at this time, because we wanted
the focus
to be more on suicidality than drug use.
DR. GOODMAN: Ms. Griffith.
MS. GRIFFITH: I wanted to know, since the
data you got was January to June, and the
Advisory
didn't come out until late March, is it
possible to
look at the data that you got April to
June to see
121
if there is a decline?
MR. EVANS: We did look at it monthly in
those months, and there was not any
decline. I
mean it wasn't a change.
DR. GOODMAN: Are these new prescriptions?
MR. EVANS: These were total
prescriptions, new and refill.
DR. GOODMAN: Did you separate out by new
prescriptions in terms of the monthly
rate?
MR. EVANS: We can, and we did, and we did
not see much of a decline in those, as
well.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: On the surface, this looks
not bad in the sense that 65 percent are
being
written by psychiatrists, but although I
am not
here as a patient representative, I do
have a
daughter who has been on these
medications, and I
know for a fact that most often
psychiatrists do
not prescribe these medications.
My image is that at the end of
the day,
they take a whole packet of
prescriptions--and I
will be interested to have the
psychiatrists
122
respond to this--a whole packet of
prescriptions
that have been written by social workers,
pharmacists, psychologists, and sign
their name.
So, I think when we are talking
about
educating primary care providers, looking
at this,
I am reassured, but I know that this does
not
represent who is actually writing the
prescriptions.
MR. EVANS: Yes, this is a limitation of
the data, too, the data is only as good
as what the
pharmacist inputs at the computer, and,
you know,
if that specialty is on there, hopefully,
they will
put that on there.
DR. CHESNEY:
I am sure they don't, but I
think this is very important in the
educational
issue, because the people who are
prescribing this,
on the whole, are not child
psychiatrists, and they
are family practitioners, they are ER
physicians,
they are nurse practitioners, they are
pharmacists.
I mean I was appalled at what
happened
when we visited one of these pharmacists,
but no
disrespect to pharmacists, but this is
very much
123
happening out there.
DR. GOODMAN: One last question for ODS
representative from Dr. Wang.
DR. WANG: I was curious, has anyone
studied what happened after the British
contraindicated these in children, just
to get a
sense of what the impact of a labeling
change, such
as that, might be?
MR. EVANS: In February, they looked
through 2002, the market between 2002 and
2003
group, 15 percent with no change really
in the
adolescent and children population. It was still
around 78 percent, so I don't think there
was a
change much in this country.
DR. WANG: But you don't know of any data
in the British--
MR. EVANS: We didn't look at that.
DR. GOODMAN: Thank you very much. You
may step down.
We have six more
presenters. I am not
taking any more, that's it.
Dr. Leslie, do you remember
your question?
124
DR. LESLIE: My question goes way back and
is for the FDA. I think reading through the
materials that we received from the
public, two of
the major concerns about the data that
was coming
in were suicidality, et cetera, being
captured
under other labels, such as emotional
ability, and
then also the issue about dropouts were
people
dropping out of either the placebo or the
drug
groups, that were having the kinds of
adverse
events that were of interest to us, and
then not
being counted in the data.
So, I had two questions. One was do you
feel confident that the data you have
received has
addressed those two issues for the
analyses that we
looked at yesterday, and the second was
what steps
could you potentially take to address
those
drawbacks that were raised by the public in
the
written requests that proceed from here
on out.
DR. LAUGHREN: I can respond to the first
part of that. In terms of the data that we
received, if you recall, we issued letters
to
companies in July of last year, which
specified a
125
very clear research strategy for looking
for
adverse events that might be related to
suicidality.
It included both preferred
terms and
verbatim terms. All these data are electronic, so
it was a string search to look for events
that
might be possibly related to
suicidality. In
addition to that, we asked companies to
look at all
their serious adverse event narratives,
any event
that had been classified as a serious
adverse
event, they would have to look at and
make a
decision whether or not that might
represent
suicidality.
Then, later in the year, we
issued
additional requests to basically ask them
to give
us all the serious adverse event
narratives, so
that we could have Columbia themselves
look at
those data, and also, all accidental
injuries and
accidental overdoses to try and broaden
the search,
to make sure that we could capture
everything that
might be related.
Now, it is true, despite all of
that, it
126
is possible that certain events that
didn't rise to
the level of being a series adverse event
might
have been captured under some other
either verbatim
term or preferred term.
The other question is whether
or not the
narratives that we received fully
reflected the
case report forms. The narratives are created by
the companies. To try and address that, we have
sort of a second level of this contract with
Columbia that is ongoing right now.
We have done a 20 percent
sampling of the
case report forms for the narratives we
have, to
have them check the narratives against
the case
report forms basically to see whether or
not they
fully reflected, the narratives fully
reflected
what was in the case report form.
In addition to that, we have
asked for the
dictionaries. The dictionaries, basically,
companies, when the code data, they
subsume them
under preferred terms, and once they do
that, that
creates basically, a dictionary.
So, we have asked for the
dictionaries
127
from all these sponsors. Columbia is currently
looking at those dictionaries to see if
there are
any other additional adverse event terms
that might
be of interest to look at, again to
answer that
question whether or not all relevant
events have
been captured.
That is a very tedious,
time-consuming
process, but it is ongoing right now.
Dropouts, Dr. Hammad addressed
that
yesterday. We did look at dropouts, and as he
suggested, it is true, many patients were
dropping
out for these events. In a sense, it was almost a
surrogate for that endpoint.
DR. GOODMAN: Dr. Posner, did you have a
comment?
DR. POSNER: I just wanted to say that, in
addition, because we asked for all of the
accidental injuries, and that would be
the most
likely place, that all of these events
involved
some type of injury or another, that you
would find
events that were missed, so we can feel
reasonably
confident that this body of data
represents
128
everything we would want to look for, but
we are
doing these additional steps, as well.
DR. GOODMAN: Dr. O'Fallon.
DR. O'FALLON: Yes, this sort of follows
up.
We are back to what I am concerned about, the
people who came here, they are worried
about the
side effects, the toxicity here. Right from the
beginning, when you told us back in
February about
this study, I was worried about what
wasn't
recorded in the drug companies' records,
for
whatever reason.
I think that is still, no matter
what we
do going forward, we have got to address
the issues
there.
So, what I am wondering about, I would like
to propose, and you shoot at and tell me
that these
things are not feasible, but it seems to
me what we
really need are somehow a standardized suicide
monitoring procedure or whatever for
future studies
in mental illness, any kind of a drug
that is
targeted toward the mind, we should be
looking for
this type of thing, the suicidality side
effect.
Then, I think we are going to
have to have
129
some sort of standardized suicide
coding. They
have done it in adverse events, not
great, but it
could be done better for suicide coding
because of
the work that has been done here.
I think this has been a
wonderful outcome
in terms of the coding issues.
Now, here is one that is going
to kill
everybody, but you can make suicidality a
goal, a
primary goal in, say, mental illness or
maybe
depression more specifically, where you
really
think that this side effect or toxicity,
this
adverse event is also a symptom of the
disease.
In cancer, they have had to
struggle with
the issue of distinguishing side effects
from
symptoms of the disease for decades, some
way of
going after that.
Just one more comment. This is a comment.
I believe that there was a 40 percent--in
the stuff
I saw before I came out here--I think I
saw 40
percent placebo effect in TADS, the TADS
study.
If that is true, this is a
major issue.
That is one of the reasons why we really
do need to
130
have placebo arm in these different
studies,
because if 40 percent of this population
will have
a beneficial effect due to sugar pills,
to try to
tease out true effectiveness of these
medications
given their severe side effects, it is
very
important that we have a placebo arm even
going
forward.
I know that you are not
thinking of it,
but I think some of the people in the
room are
wondering why we have to go with sugar
pills.
DR. LAUGHREN: Let me comment on the last
point first. We clearly agree with you about
placebo, but it is not just the act of
giving a
pill.
In all of these trials, there is a lot that
happens that results in improvement.
DR. O'FALLON: Yes, I know that.
DR. LAUGHREN: There is a lot of
attention, the patients have a lot of
interaction
with staff. That is really the placebo effect.
But the other point you are
making, I
completely agree that ascertainment is
ultimately
the issue. If you don't collect the information,
131
it doesn't make any difference how
carefully you
search the database, if it wasn't
collected, it's
not there, so ascertainment is key.
Again, that is one of the
things that we
hope to get out of this effort with
Columbia is a
better guidance document for future
trials to make
sure that suicidality is properly
ascertained, but
it is an evolving thing in the
field. I mean there
is
not at this point in time an optimal way of
doing that, so we hope to get an
instrument that we
can apply for future trials.
Again, I agree with you that
coding of
data needs to be standardized, and again
that is
one of the things that we expect to come
out of
this.
DR. POSNER: Could I just add to that? We
are very committed to addressing the
question that
you are referring to.
DR. GOODMAN: Would you bring the
microphone closer.
DR. POSNER: I said we are very committed
to addressing this issue in terms of
suicidality
132
adverse event monitoring, and Dr.
Laughren
mentioned guidelines that we are going to
write and
measures that we actually have developed
that we
can implement in all trials, that will
help us
collect the right data and then be able
to use
these consistent definitions to classify
events, so
we can make sense across all of these
trials.
What is important to note is
that we are
working on a National Institute of Mental
Health
study called TASA, Treatment of Adolescent
Suicide
Attempters, which is very focus on this
issue of
adverse event monitoring, and it is
wonderful
because it is helping us inform the
process, so we
have developed very, very rigorous
standards of how
we ask these questions, what measures we
use, and
how to do it consistently, and that will
help
inform the guidelines and the measures
that
industry and everybody else can use.
So, we have made a lot of
progress in
that, I think.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I just want to follow up on
133
the last discussion. It seems to me there are two,
somewhat separate things, and I would be
interested
in people's views.
One is to make the periodic
routine
question better than it is. There is a suicide
item on the score, but that didn't show
anything.
Maybe that will never show anything
because when it
happens, it happens abruptly and you
don't happen
to pick it up at the two-week period, but
it does
seem as if a better questionnaire on that
question,
done routinely, might be useful.
The second part of it is how to
characterize events, what questions to
ask about
those, what to write down. Is that what you are
thinking, they are two somewhat different
things?
DR. LAUGHREN: I agree, they are two
separate things. There is the suicide item that is
part of every one of these instruments
and sort of
standardizing how that routine
information is
elicited, but then when an event occurs,
you have
to ensure that the appropriate questions
are asked
to flesh out that situation, so that
someone down
134
the road who is looking at the data is
able to make
sense of it.
DR. O'FALLON:
But I would like to point
out that the monitoring procedures,
especially for,
say, the first two weeks or something
like this,
should include a real collaboration with
the
children and their caregivers, their parents,
whoever they are living with, to be on
the watch
for those and to report them immediately,
and that
those things would be part of the data.
DR. LAUGHREN: Let me just respond to that
quickly.
Basically, you are switching gears to a
clinical setting, I think, other than a
clinical
trial.
DR. O'FALLON: You guys can write the
regulations for the clinical trial,
right?
DR. LAUGHREN: Right, but obviously, the
points that you are making apply to
clinical
practice, as well.
DR. O'FALLON: Yes, but they would apply I
would say in the clinical trial, because
I think
that you are not possibly getting all
your
135
information. If you don't come in for two more
weeks, people forget that they were
scared 10 days
ago.
DR. LAUGHREN: Absolutely, I agree.
DR. POSNER:
I just wanted to add that we
are also working with the CDC just on
this
question, what are the right one or two
questions
that need to be asked in any trial or
clinical
setting to get this information to be
able to
classify it appropriately, which is
exactly what we
are talking about, and it is not
necessarily the
best questions on the measures that were
used in
this trials, but that is exactly the
pertinent
point in clinical setting or in research
settings
with the increased monitoring that you
are
referring to.
DR. GOODMAN: I am going to need to wrap
up the remaining questions in the next
five
minutes.
Dr. Irwin.
DR. IRWIN: The question I wanted
to ask
specifically was related to the one that
is on the
136
table right now. Yesterday, we heard from several
families and individuals about really
homicidal
behavior and more violent behavior
outwardly
directed, not internally directed.
Of concern to me is that the
focus has
been so much on suicide, but what I
wanted to know
is what kind of monitoring or what kind
of tools
are in place to really measure that
phenomenon in
these trials, because it seems to me that
we don't
have any data that has been shown to us
at least on
adverse experience or events with the
clinical
trials.
DR. LAUGHREN: Our focus here clearly has
been on suicidality, and not on hostility
and
violence.
There was a lot less of that in these
trials than we had suicidality, and we
have not
come to grips with that yet, but it is a
whole
other area that needs to be fleshed out
and
developed in the same way that
suicidality has been
fleshed out because again we have
included in our
database information on whether or not
these
individual patients at some time during
the course
137
of treatment were coded as having
hostility or
agitation as a preferred term.
If you go back and look at what got
subsumed under that, I am sure it is
going to be
quite different depending on different
sponsors,
and it really requires a parallel
development to
try and understand what that means.
Again, all the things we have been
talking
about for suicidality apply to that
domain, you
know, how do you ascertain for it, what
kind of
questions do you ask to flesh it out, it
is a real
problem.
DR. GOODMAN: By the way, the placebo
response rate from the TADS trial is 35
percent.
Looking at the paper again, I see 35
percent.
DR. O'FALLON: Okay.
DR. NEWMAN: Just to clarify, that is much
or very much improved in the TADS trial.
DR. GOODMAN: I don't think that one is
based on the CDRS, right, that is what
you are
saying, it is based on the CGI?
DR. NEWMAN: The dichotomous outcome was
138
were they much or very much improved, so
if you
said just improved, reasonably, it would
have been
a lot more.
DR. GOODMAN: But that is the standard, I
mean it has to be much or very much
improved to be
a responder. That is pretty much across all
clinical trials.
Dr. Pine, please.
DR. PINE: I want to return to a point
that was raised by Dr. Goodman and just
call the
committee's attention to a couple things
that he
said and then also raised a couple other
issue
relevant to the discussion about 10 or 15
minutes
ago with FDA.
That is the issue of both how
perplexing,
but also how important it is to think
very
carefully about the efficacy data and the
difference between the data for
fluoxetine, on the
one hand, and all the other
antidepressants, on the
other hand, and how do we understand
that.
Number one, just to underline
that I agree
that the importance of that point cannot
be
139
overstated. I guess there is a couple of issues
that were not discussed 10 or so minutes ago in
sufficient detail, and really two points
to raise.
One is that I do appreciate
from a
regulatory standpoint that it is very
difficult to
specify exactly how one is to do an
appropriate
study.
We talked about a lot of the details that
we don't need to go over again except one
thing was
not discussed, and that was a discussion
of the
level of rigor that goes into both the
training of
the investigators who are going to
ascertain the
samples and document the diagnosis, on
the one
hand, but then also follow the response
of the
patients throughout the trial.
Then, I think the last thing to
say about
that specific point is that when we look at the
data that have been published, and
probably the
most extensive data are from the
sertraline trial
as opposed to the TADS trial, with the
sertraline
trial being a pharmaceutical-sponsored
study that
appeared in JAMA, and the TADS trial
being an
NIH-sponsored trial that was also
published in JAMA.
140
There are some fairly clear
signs that the
manner in which investigators were
trained, that
the criteria for enrolling patients for
the process
of evaluating the response as it was
manifest
throughout the trial was quite different
in those
two studies.
Again, when we come to the
issue of how
important it is to compare the data for
fluoxetine
and the data for the other agents, I
think we need
to acknowledge that there are already
signs in the
data that have been published in the
reports that
have appeared in peer review, that the
quality of
the studies appears to be different.
I think it is also important to
note that
if we were to look at the efficacy data
by industry
sponsor versus federally funded, there have
been,
to the best that I can recall right off
the top of
my head, two federally funded SSRI
trials, both are
positive.
So, we are 2 out of 2 on that
score,
whereas, if we look at all the others, we
are
basically 1 out of 13 or 1 out of 14.
141
DR. GOODMAN: Those two are both in
fluoxetine, isn't that correct?
DR. PINE:
That's true, so, you know, we
have a confound between federally
sponsored and the
compound, but those are the data that we
do have,
and I think given the issues that I just
discussed,
you know, we are going to be very hard
pressed to
say this is a funding or design feature
issue,
which it might be, or that this is a
medication
issue, which again it might be.
DR. GOODMAN: I want to make sure I am
clear on the source of the fluoxetine
data for the
clinical trials. I think it was mentioned before
that some of the data that contributed, I
don't
know which of the positive studies, but
one of the
positive studies at least, was actually a
study
that had been conducted by Dr. Emslie, and
that, in
fact, was a federally funded study, is
that
correct?
DR. LAUGHREN: Yes, the Emslie study was
funded by NIMH, but there was another
independent
trial that was funded by Lilly, that was
also
142
positive.
The TADS trial was not part of our
decisionmaking, that came later. So, there was
another positive fluoxetine study that
was done
entirely under Lilly's sponsorship.
DR. GOODMAN: Dr. Rudorfer, did you have a
comment?
DR. RUDORFER: Just on this last point, I
think that was back in '80s, am I
correct, that the
Emslie study was first done?
DR. GOODMAN: No, '97.
DR. RUDORFER: Because we have in our
material, a fluoxetine clinical trial
that goes
back to the '80s.
DR. PINE: That was a very small study, at
least as I understand it from reviewing
the
material.
Maybe you want to comment on the 1980
study.
DR. LAUGHREN: I am not familiar with that
one.
I think the Emslie study was maybe early
'90s, but we can probably check. I am sure it is
in Dr. Dubitsky's review.
DR. PINE: Well, in the material that we
143
received, there was a study that was
described,
that I recognized just from the
description as a
study that was published in 1990 by
Simian as the
first author.
DR. LAUGHREN: That was probably, I think
it was HCCJ. That was the study that was
terminated early. I think there were only 40
patients in that trial. That was not one of the
trials that was the basis of our approval
of the
claim in fluoxetine.
DR. RUDORFER: Could I insert just another
quick safety-related question? We were talking
before about if there is a way to judge
the impact
of the label change that was made in
March, since
that would seem important to us in terms
of whether
an additional change would be helpful.
I am wondering if the Med Watch
Program
offers any clues there in terms of
reports from the
clinical community of adverse events,
whether there
has been a change in 2004 versus last
year, for
instance.
DR. TRONTELL: We haven't looked at that.
144
The Med Watch Program, just to be very
precise, has
two components. Med Watch itself involves
reports
that come directly to the FDA, and don't
come
through the pharmaceutical
manufacturers. That is
actually a minority of the reports, 5 or
6 percent.
The Adverse Event Reporting
System, which
Med Watch and the manufacturers feed
into, is much
larger.
The challenge was reports that came to the
agency spontaneously, that you actually
can, in
fact, see a paradoxical increase in
reports when
these events become known to the public,
so it is
not a reliable way to tell you whether or
not
things are changing, because we know not
every
report comes to us and the factors that
influence
reporting are changing dependent on
scientific and
media attention.
DR. RUDORFER: So, within the agency, do
you see any index that you can use to
judge the
impact of the label change in March?
DR. TEMPLE: The only thing that you could
measure properly is use, so if the
warning sort of
made people think twice, and decided to
watch and
145
wait instead of treat, you could detect
that
through the data that have been
described.
But the adverse events are
unpredictable.
We know that not all serious events are
reported,
you know, various estimates go from 1
percent to 10
percent to higher, but as Anne said, if
you change
public attention to something, you can
get
increased reports without having increased
numbers.
It is very hard to know that,
to know
about those things. What you can think about is
looking at databases that have reports of
these
things, the kind of thing that Jick did
and others,
but the events in question, first of all,
you are
not sure how well they are described, you
are not
sure whether they get into the reporting
system.
It is very difficult territory. You know,
epidemiology is difficult enough, this is
particularly difficult, because you don't
know how
they are classified and it is really
hard.
DR. TRONTELL: Just to follow up, if you
want to see a change, you may actually
have to wait
some time before you see a change in the
outcome.
146
If you wanted simply to see if
prescribing
practices are different, I think you
might have to
go even beyond the use data we have, even
beyond,
say, new prescription to see if starts on
these
products are changed, to actually do some
active
surveillance and survey clinicians or
survey
patients to find out if, in fact, there
is a
different process for introducing these
products.
DR. GOODMAN: Dr. Marangell, did you have
a question? Okay.
Dr. Fant.
DR. FANT: I just want to follow up on
that and the comments and questions that
were
raised by Dr. Chesney earlier.
One of the things that I was
struck by
yesterday and hearing the testimony of
the
families, and from my own personal
experiences with
friends and family members, much of the
discussion
here has been focused on the use and
efficacy and
outcomes of these drugs related to major
depression
in the trials that have looked at that,
but the
off-label use of these medications is
fairly
147
promiscuous, and the prescribers extend
well beyond
those that are trained in the care of the
mentally
ill.
I think that is a real problem
when you
have ob-gyns prescribing it and giving it
away for
ladies who just may be a little moody,
you know,
when they come in, or feeling a little
down, and
without having any consultation or
evaluation by
someone who is specifically trained to
evaluate
that, I think that is a problem and I
don't think
that represents an isolated incident.
I think any labeling change
considerations
really need to not necessarily be
directed to
regulate how medicine is practiced, but
to somehow
influence or disincentivize that kind of
unrestricted free-lance approach to how
these
medicines are used.
I think that has to be kept in
mind, and I
would just like to emphasize that.
DR. GOODMAN: Dr. Perrin?
Dr. Irwin.
DR. IRWIN: I would just like to respond
to that. I mean I agree with you that the
148
distribution of these medications by
individuals
who aren't trained is really a worrisome
fact, but
I will tell you in San Francisco County,
to find an
individual who is trained to see a child
with a
mental health disorder is virtually
impossible
unless someone walks through the door
with $175 in
hand to give to a psychiatrist.
So, I think that what has
happened, and
it's a fundamental problem that we are
dealing
with, and it is not the purview of this
committee,
that the issue of mental health problems
in
children and identifying individuals to
care for
them or finding individuals to care for
them is
really very, very difficult, and it
pushes primary
care clinicians to prescribe and make
judgments,
and provide medications when they
probably should
not be without appropriate consultation.
So, I think it is a real major
crisis.
DR. FANT: I agree 100 percent, and I make
those comments fully cognizant of the
fact that the
mental health arm of health care in this
country is
probably in worse shape than health care
in the
149
broader context.
Certainly, in terms of its
availability,
certainly in terms of its coverage by
health
insurance plans, it is not sufficient to
do what it
needs to do. But I think it is important not to
make it easier for bad medicine to be
practiced
under those conditions, but to somehow
create
conditions that kind of force, at least
under those
suboptimal conditions, some better
protections and
better practices.
DR. GOODMAN:
Drs. Pfeffer and Wang, and
then we are going to take a break.
DR. PFEFFER: I would like to just go to
another area of our discussion and that
is to focus
on what I will call the real world
issues. I think
that the speakers yesterday in their own
way gave
us a representative view to some degree
of that,
and I am wondering, someone mentioned, I
think Dr.
Pine, about prescriptions and can they be
a little
bit more either regulated or I will say
focused.
I am wondering if we might
consider the
option of when a physician writes a
prescription
150
for a medicine, such as an SSRI, that
what is also
included on the prescription is the
diagnosis, so
that we would have the kind of data that
we just
heard, but amplified by some knowledge at
least of
what the clinician is thinking about the
rationale
for the prescription.
I know we do that in New York
relative to
controlled substances at times, or other,
in the
clinics, for example, the prescription
forms
actually have that on their forms. So, I don't
think it's any greater violation of
patient's
privacy than to say a patient is already
on a
medication.
It might provide us with some
additional
national-like real world practice ideas.
The other comment I would like
to make is
that I think it was Dr. Zito who
mentioned
yesterday about a proposal of having sort
of a more
widespread, sort of service oriented
approach to
study the issues also.
So, I think while we are
talking about
constructing drug trials that are
carefully
151
controlled and carefully defined in terms
of the
population, given the fact that the
prescriptions
are being used much more widely, it might
be
helpful for us to have a view, a focus,
and how can
we study these issues also, and the
studies need to
be done obviously in different ways.
DR. GOODMAN: Dr. Wang, did you have a
question?
DR. WANG: No, it was covered.
DR. GOODMAN: I would like to take a
10-minute break and then we are going to
return for
a presentation, and we need to at least
handle one
of the questions before we break for
lunch.
[Break.]
DR. GOODMAN: We are about to begin.
Please take your seats.
If you recall from yesterday,
when Dr.
Wysowski was presenting, she said she had
some
additional data that was provided on the
Jick
study, and we asked her to defer until
today to
present it. I think she should be able to do that
pretty quickly, also give you an
opportunity to ask
152
her any other questions that you think
are relevant
to today's discussion.
At the close of that
presentation, we are
going to get down to business in
addressing these
questions sequentially. In the course of doing so,
I am going to ask you to, as best as
possible, to
restrict your comments and the discussion
to the
question at hand. Otherwise, I may defer that to
later in the course of our discussions.
So, with that, Dr. Wysowski,
could you go
ahead and present the data. Maybe you want to give
us a little bit of a sense of the context
first.
Diane Wysowski, Ph.D.
DR. WYSOWSKI: Right.
I don't know how
important or relevant this is at this
point in
time, but I am going to ask you to switch
gears
from the clinical trial data and think
back to my
presentation yesterday morning, which was
on
patient level controlled observational
studies.
I talked about two studies, the
Jick study
that was published in JAMA, and the
Valuck study,
but I am going to have you focus on the
Jick study
153
and recall that it was a case-controlled
study. It
was done in the United Kingdom and the
General
Practice Research Database, and it
examined the use
of four antidepressants - amitriptyline,
fluoxetine, paroxetine, and dothiepin in
suicidal
cases versus non-suicidal controls.
In their original analysis, Dr.
Jick and
his colleagues used dothiepin as the
reference
category.
At FDA's request, Dr. Jick and
colleagues
kindly re-analyzed their multivariate
data for
nonfatal suicidal behavior using
amitriptyline
rather than dothiepin as a reference
category.
The data are controlled for
age, sex,
calendar time, and time from first
antidepressant
prescription to onset of suicidal
behavior. Now,
in the lefthand portion of the slide, you
see their
original analysis with the risk ratios
and 95
percent confidence intervals with
dothiepin as a
reference category.
On the right, with
amitriptyline as a
reference category, the risk ratios for
both SSRIs
154
increased and became statistically
significant at
the 0.05 level. The risk ratio for dothiepin was
1.21 with a 95 percent confidence
interval that
included 1.
For fluoxetine, it was 1.40
with a 95
percent confidence interval of 1.03 to
1.91, and
for paroxetine, it was 1.55 with a 95
percent
confidence interval of 1.11 to 2.16.
Now, the investigators asked
that their
interpretation of these results be
presented
verbatim to the committee. We advised that these
post-hoc analyses be interpreted with
caution.
They were not the preplanned primary
analysis, and
the p-value and confidence intervals are
not
adjusted for multiple hypothesis testing.
We think conservative interpretation
requires that p-values lower than 0.05 or
confidence intervals with coverage
greater than 95
percent would be necessary to assert that
these
results are statistically significant
with overall
5 percent Type 1 error.
These results are consistent
with the
155
interpretation in our report that the
risk of
suicidal behavior after starting antidepressant
treatment is similar among users of
amitriptyline,
fluoxetine, and paroxetine compared with
the risk
among users of dothiepin, and that a
possible small
increase in risk bordering statistical
significance
among those starting the newest
antidepressant
paroxetine is of a magnitude that could
readily be
due to uncontrolled confounding by
severity of
depression.
Moreover, we did not observe an
increased
risk of suicide itself for the users of
amitriptyline, fluoxetine, or paroxetine
compared
to users of dothiepin.
So, that is their supplementary
analysis,
it was a post-hoc analysis, and that is
their
interpretation of the results. It did increase the
two SSRIs to the level of statistical
significance
at the 0.05 level.
DR. GOODMAN: Now, dothiepin is not a
medication available in this
country. It is also a
tricyclic antidepressant, as is
amitriptyline,
156
isn't that true?
DR. WYSOWSKI: That is correct, but again,
the choice of the reference category
makes a
difference in the results.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: I think it is very helpful to
have these additional analyses. I really had,
though, a couple methodologic questions
about this
and the Valuck study that I think are
fairly quick.
One is, in the British
database, how valid
or reliable are these measures of
suicidal
behaviors, not achieved suicide, and
similarly, how
good were the measures in the Valuck
study of--I
can't remember the terminology they used
off the
top of my head--but of suicidal behaviors
given the
kind of database they had to work from?
DR. WYSOWSKI: Well, one of the concerns
that I had, which I expressed yesterday,
was that
the possibility of missing data and
incomplete
ascertainment, and misclassification, and
when you
are talking about suicide ideation, which
is a
softer, more subjective diagnosis, it is
difficult
157
to know how many people actually come
forward and
report that. I guess if it's a serious concern,
they come forward and report it.
One of the things that I think
Dr. Jick
says is that there is some
possibility--the general
practitioners on which the data are
based, they
make these notes, and it looks like they
get
entered into the computer about 90
percent of the
time is what I figure from what Dr. Jick
says here.
So, if there is some
misclassification in
that way for the 10 percent that don't
get entered,
of the missing data, you would be
concerned.
DR. PERRIN: But it requires that the
general practitioner actually puts it in
his or her
notes for it to get even possibly
entered. There
must be substantial variability in that
phenomenon.
DR. WYSOWSKI: Well, they do have
computers, and these people were trained,
and so
they achieved a level of training success
to be
entered and qualified for this database,
but it
sounds to me like--it says here,
"Information on
patient referrals and hospitalizations
available in
158
the manual medical records in the general
practitioners' offices was recorded on
the computer
more than 90 percent of the time."
So, that implies that about 10
percent of
the time you are not going to find the
data there.
It was in the manual record, but not on
the
computer.
So, there is some possibility for some
error there.
Now, how that actually works
out into the
results, don't know really.
DR. PERRIN: For the Valuck study, do you
have information on their measure of
suicide
attempt?
DR. WYSOWSKI: The Valuck study was based
on paid medical claims data and of 70
managed
health care organizations. I talked to Dr. Valuck
about that, and he said that he thought
that the
PharMetrics integrated outcomes research
database
that he used, which is the 70 managed
health plans,
that the data was very good and very complete, but
one of the things that is a problem with
his study
is that he cannot go back and validate
through
159
medical records the information that he
has on the
computer, so that is one problem, but he
said that
was better than most Medicaid databases.
DR. PERRIN: Most Medicaid databases are
very poor for analyzing children's mental
health
services.
DR. WYSOWSKI: Right.
DR. GOODMAN: Dr. Ortiz, did you have a
question?
DR. ORTIZ: I just was wondering if Dr.
Wysowski could clarify the risk ratio for
this. Is
it
suicidal behavior, suicide attempts?
DR. WYSOWSKI: It is nonfatal suicidal
behavior, which includes ideation and
attempts.
DR. GOODMAN: I believe in reading the
Jick paper, there was reference made to 15
completed suicides in the entire
population.
DR. WYSOWSKI: Right.
DR. GOODMAN: And they go on to point out,
those 15 were within the 10 to 19 age
group, in
fact.
There were others obviously outside that
range, but that none of the 15 in that
younger age
160
group were on antidepressants.
DR. WYSOWSKI: Right.
Actually, they
include suicides in their study, and
there were 17
cases and 157 controls, but also I think
Dr.
Goodman is referring to the fact that,
yeah, there
is some information on children that
committed
suicide, and it was somewhere on the
order of about
15.
But that makes me wonder. I wasn't able
to determine whether that 15 is a
reasonable rate
or not, so, you know, whether that is
under-ascertainment or not, we don't
really know.
DR. GOODMAN: That, in part, was my
question.
I wasn't sure from reading the paper how
they ascertained it, but it still was
striking that
none of them were on antidepressants.
DR. WYSOWSKI: However, they do say here
that causes of death in particular are
routinely
recorded, so you would think that they
would have
pretty good data on deaths, but you don't
know, and
all the suicides, but you don't know.
DR. GOODMAN: Dr. Gibbons.
161
DR. GIBBONS: Most statisticians view
large-scale naturalistic observational
studies as
statistical atrocities. I am not one of them. I
think there is a great deal to be learned
from
naturalistic observational data.
Having said that, I think it is
very, very
important to protect oneself from bias
due to
selection, and it appeared to me here
that, you
know, there is all kinds of selection
bias as to
who gets on to what kind of medication.
I guess, first, there is a
question, well,
first, there is a statement. These are sorts of
cases where things like propensity score
matching
and other sorts of methods that have been
around
for a long time for the analysis of
observational
data are critically important.
Covariate adjustment typically,
which I
imagine was done here, can be very misleading,
because it assumes linearity, and many of
these
relations aren't linear, and, in fact,
the biases
cannot be overlapping. You could have situations
where the people who got on to one drug,
don't look
162
anything like the people in the other,
and, in
fact, the use of covariates in a general
linear
model will be more misleading than
helpful.
Have they made any attempt to do
this
simple analysis using some form of
propensity score
matching to ensure that the likelihood of
taking
the drugs is consistent between the two
groups?
DR. WYSOWSKI: Yes.
Dr. Jick did not, but
Dr. Valuck did, and I presented those
results
yesterday. In the poster, there was no increase in
risk for any of the antidepressants, but
they had
classes of antidepressants, as you
recall. They
are not individual antidepressants.
For the expanded study, which was
based on
24,000 patients with diagnosis of major
depressive
disorder, they did find a relative risk
of about
1.58 for the SSRIs, but it was not
statistically
significant. They did include a propensity
matching adjustment.
DR. GIBBONS: Given that we are seeing
this consistent 1.4, 1.4 through a lot of
the
analyses, it would be very interesting
either to
163
have them do those analyses or perhaps
the
committee would think about performing
such
analyses if we could acquire the data.
DR. GOODMAN: Thank you very much.
DR. WYSOWSKI: You are welcome.
Discussion of Questions and
Vote
DR. GOODMAN: It is time to roll up our
sleeves.
I would like you to pull out the
questions before us. It was given out attached to
the agenda for the meeting, on one page,
or you can
use it as represented in the slide
handout that Dr.
Laughren gave earlier today.
Let me make a few comments
first, before
we begin to address these questions. For the most
part, they are focusing on risk,
specifically, risk
of suicidality, and it seems to me it is
not until
Question 4 that we need to be thinking
about ratio
of benefit to risk.
So, I think for the most part,
the first
three questions focus entirely on risk,
but in
order to come up with some
recommendations in terms
of regulatory actions, we do need to
consider the
164
balance between risk and benefit.
Also, in talking about
suicidality, there
are some definitional questions that have
come up
all along, and I think we need to be,
among
ourselves, as clear as possible what we
mean when
we say suicidality. Maybe there will be some
benefit from the work that the Columbia
group has
done to help us make sure that we are
using the
same language.
Also, I think it behooves us to
try to
translate what suicidality means to the
general
public.
In looking at some samples of the morning
papers, front page New York Times, front
page USA
Today, there are headlines about how it
has been
concluded already, based on yesterday's
discussion,
that the antidepressants increase
suicidality in
children.
I am trying to imagine. I would be
interested in how a parent, in reading
that, what
they would think, what do they mean by
suicidality.
My
guess is that they are going to think that it is
suicide.
As we discussed yesterday, this includes
165
suicide, it includes suicide attempts,
but our
definitions also includes preparatory
actions and
ideation.
So, I think we need to be very
clear that
we are using the same terminology, and
maybe Dr.
Posner will be able to help us along the
way in
that.
As I said a little bit earlier,
that we
are going to try to keep very focused on
the
question at hand, so I may defer some of
your
questions until later in the day. I would like
very much to be able to answer at least
one,
perhaps two, questions before breaking
for lunch,
so that the reward will be lunch to get
some of
this work done.
My sense is that Question 1 may
be the
easiest question, and then they may get
increasingly more difficult, so I think
we need to
pace ourselves accordingly.
Also, just as another kind of
overarching
statement is that for the most part, at
least in
the beginning, we are asked to focus
exclusively on
166
the clinical trials, but as we begin to
deliberate
on issues of risk and benefit, then, we
have to
then begin to consider data from outside
those
clinical trials and therefore, our task
becomes
more difficult and more complex.
Any questions about process
before we
begin our comments?
MS. DOKKEN: Just before we start on the
specifics of Question 1 or 2, as someone
new to the
committee, who is trying to listen and
learn about,
I do have a question related to guidance
from both
the Chair and the staff, and I would feel
more
comfortable hearing about this, I guess,
before we
even get into Question 1, which is I hear
still
some discomfort about the data.
On the one hand, the options of
labeling
and black boxes, et cetera, but I hear
another
theme, too, which was articulated in
particular by
Ms. Griffith, and that is, even though we
are two
advisory committees only, and even though
the FDA
is regulatory, is it within our purview,
and more
so, do we have a responsibility to go
beyond
167
something narrow like that, like
labeling, and also
talk about the issues.
As I said, Ms. Griffith
referred to
education, not just of clinicians but of
the
public, and how much time, you know, can
we
allocate time to that, as well.
DR. GOODMAN: Dr. Katz.
DR. KATZ: One response to the last part.
I think when we get to the appropriate
time in the
meeting, I think you should discuss in a very
freely ranging way what provisions you
think would
be a good idea to institute in order to
use these
drugs safely.
I wouldn't worry so much about
the nuances
of what your responsibility is or what we
can do
from a regulatory point of view. If there is
something that you recommend, and we have
already
talked a little bit about this, if there
are things
that are outside our purview and we are
incapable
legally of instituting, we will get back
to you on
that or will let you know, but I think we
really
want to hear a relatively wide-ranging
conversation
168
about what sorts of things you think
might be
useful.
If we can't do it, we will let you know,
but we would like to hear about it.
DR. GOODMAN: Any other comments about
process?
I also noticed behind me that
we have
Question No. 1 projected, so you don't
need your
reading glasses to address it.
Let me read it. Please comment on our
approach to classification of the
possible cases of
suicidality. Here, by parentheses, that word has
been defined.
Suicidal thinking and/or behaviors,
and/or analysis of the resulting data
from the 23
plus 1 pediatric trials involving 9
antidepressant
drugs.
Another thing I probably should
mention is
that in terms of the questions we vote
on, clearly,
No. 2 is one we are going to vote on, and
a yes
vote then would lead us into No. 3. I am not sure
that No. 1 requires a vote. You are asking for
comment.
Are you asking for a vote on
this
169
question?
DR. KATZ: No, we are not asking for a
vote, just comments, just a general sense of the
committee.
DR. GOODMAN:
I was going to actually
start and try to answer the question
first, to go
out on a limb, since this is the easiest
question,
I thought I would take a stab at it, in
my opinion.
But if there are other comments, and I
will be
going around the table, so that each of
you will
have a chance to comment, so unless it's
really a
process question, you will get your
chance.
It is a process question.
DR. NEWMAN: This is a process question.
It seems to me it might not be a good use
of time
to go around the table and have everybody
comment
on it.
I mean I just think they did a great job,
we should praise them, and move on to
some more
substantive issues that are important.
DR. GOODMAN: You stole my words, now what
am I going to say. I do like to go around the
table even if the comment is ditto, just
to give
170
everybody a chance to speak.
Let me start. I would agree that I think
that given the inherent limitations of
the data, it
was a very rigorous examination, very
carefully
planned, involved leading experts. There was
appropriate blinding, more than adequate
training.
We saw, too, that we had further vetting
by
agreement with an independent study that
was
conducted by the FDA in a subsample.
I think there is always room
for
criticism, but I think most of my
criticisms would
be regarding the inherent limitations of
the data
itself, not what was accomplished by
first the
Columbia group and then the FDA's
re-analysis of
the
data.
So, my comments are very
favorable and I
can't see that there is much room for
improvement.
In fact, I am impressed with how much
they
accomplished, and I was somewhat
skeptical in our
last meeting, and very impressed with the
outcome
and attention to detail.
So, let me now go around the
room starting
171
with Dr. Fant.
DR. FANT: My only comment, I agree with
everything that you just said, my only
comment is
in the same spirit of my father, when I
would come
home with a 98 on my test, and he would
wonder why
I didn't get 100, and I guess my question
to Dr.
Posner is, is this scale applicable across
various
cultures and racial groups in terms of
behaviors
and actions that may be significant with
respect to
the endpoint that may differentiate one
group from
another, that may be useful in trying to
explore
and develop those, validate this tool in
different
groups?
DR. POSNER: The answer is yes, and most
of the studies that these concepts are
based on
have a lot of heterogeneity in terms of
race and
general populations, so absolutely.
DR. FANT: So you feel comfortable that
this tool would be just as useful in an
inner city,
predominantly African-American clinic, as
well as
one that serves Southwest Hispanic
community versus
one that serves Native American kids on
the
172
reservation?
DR. POSNER: I think that the definitions
and the classification, the underlying
concepts in
the classification that were represented
in what
you saw yesterday, absolutely, and again
were based
in just those populations.
In the NIMH study that I
referred to
earlier, for example, there is a range of
all of
the populations that you just mentioned,
and those
are exactly the kind of behaviors we are
looking at
and the samples that we are looking at.
Again, it's overarching
concepts and the
behaviors are similar across all those
groups.
DR. GOODMAN: Dr. Pfeffer.
DR. PFEFFER: I think this is an excellent
scale
as a classification. I think that
it's a
wonderful beginning and carried out with
real data
regardless of the quality of the data.
I wanted to make some points
just for
clarification, and I think that is what
Kelly was
just pointing out, too, in a way. This is a
classification, and I don't know that one
can yet
173
extrapolate this to, let's say, use with
patients.
This is a secondary means of
focusing
individuals in terms of their behaviors
or
thoughts, but not yet to gather the data
about
them, and I think that is important to
emphasize,
so that much work I think needs to be
done to
create the kind of an instrument that
could be used
reliably and validly to assess directly
from the
patients what the nature of their
thinking is and
the nature of their intent, as well as
the behavior
itself.
The other point I would like to
make is
that this classification does hold across
all age
groups generally, but in creating a
method of
interviewing and establishing the
information, what
is also necessary is to consider
developmental
perspective, because we do know that
children's
cognitive capacities of understanding the
nature of
their planned behaviors are quite
different than
adults.
I will go back to the example
that tends
to be thrown out, and I would agree it
should be
174
thrown out, but the child who slapped
herself, for
example, that was one of the
illustrations.
You know, if you have a child
that has
problems or immaturity and cognition, one
might not
quite know what she was intending to do,
and a slap
or a hit with a piece of glass or
whatever, it all
can mean something quite different in the
mind of a
child, so that much work needs to be done
to tease
this out I think from a developmental
perspective.
DR. GOODMAN: Dr. Pfeffer, I would
certainly agree with your point that the
assessment, the prospective assessment of
the
patient is a different matter, but with
regard to
the narrower question, as I interpret it,
in terms
of the classification data, the process
of
classification, would you have any
additional
comments?
I think yours are more comments
in terms
of what would be the next steps in
implementing the
system, administering it to subjects in a
prospective study.
DR. PFEFFER: I think the classification
175
is excellent. I would also raise the question, the
children and adolescents who couldn't be
evaluated,
was it due to the data itself, was it due
to
questions about what category the child
might fit
into, which I tend to doubt because they
actually
solved those issues by discussions.
I think, generally, this is a
wonderful
classification.
DR. GOODMAN: Dr. Posner, you had a
comment?
DR. POSNER: I just wanted to respond to
your first point, which is you are
absolutely
right, and all of that work has been
going on
simultaneously. So, we are quite well prepared and
enthusiastic actually about putting
helpful
assessment tools into future studies now
that ask
the right questions to be able to put
events into
these kind of categories. So, there are two
separate questions and both being
addressed, I
think.
I think your next question has
to do with
our No. 3, the kids where we knew they
hurt
176
themselves, but we couldn't say why--am I
correct--and the reason was because of
the limited
data about suicidal intent.
So, these were narratives that
said
superficial scratch on wrist, and that's
it, and,
of course, not enough surrounding
information to
infer any kind of intent, so again, that
is why
that category was warranted. This is important, we
know they hurt themselves, but we just
don't know
why.
As the FDA told you, they put that into a
worst case scenario, sensitivity
analysis, which I
guess looked very similar to the primary
outcome.
Did that answer your question
about those
cases?
DR. GOODMAN: Yes.
Dr. Fost.
DR. FOST: No further comment, thank you.
DR. GOODMAN: Dr. Ortiz.
DR. ORTIZ: My comments I think are more
on the line of what Dr. Pfeffer had to
say. I
think what Columbia has done is a
wonderful start
for the pharmaceutical companies to
improve their
identification of suicidal behaviors, and
I think
177
the FDA has done a superb job of further
analyzing
the 24 studies.
However, the 24 studies
excluded children
who had suicidal ideation with the exception
of 4
studies, and the vast majority excluded
children
with history of family bipolar.
So, again, my concern is in
regards to the
testimony yesterday that we also need to
think
about families and the clinician out
there
practicing, the pediatrician in
Farmington, New
Mexico, who has a mother with a
12-year-old who
comes in, who says, "I want to
die."
I think we need to also be
thinking about
issues of side effects, of agitation,
hostility,
delusions, mania, and violence, which
this
particular population, I mean I think for
a
classification system, it is great, but
there is
other issues related to side effects and
clinical
practice that I think affect suicidality
profoundly.
DR. GOODMAN: Thank you.
Dr. Malone.
178
DR. MALONE: I agree that the combined
study was done very well, and I think it
is
encouraging that the original FDA study
pretty much
agrees with the second study, and I think
gives it
more validity that way.
DR. GOODMAN: Thank you.
Dr. Nelson.
DR. NELSON: I just have one comment, that
I think a reasonable topic for discussion
going
forward by the Pediatric Advisory
Committee might
be to think through what lessons have
been learned
by this experience for the ability to
compare
information across different drug
development
programs within drug classes, because I
suspect
this issue might exist in other areas.
So, I think that is worthy of
focusing on
at some point in the future, just to get
that on to
the docket.
DR. GOODMAN: Thank you very much.
Dr. Perrin.
DR. PERRIN: I think the classification is
great, and I would like to know a little more
about
179
the discordant cases between the FDA and
Columbia,
but I think that knowing more about the
discordant
cases would not change the findings at
all.
DR. GOODMAN: Thank you.
Dr. Grady.
DR. GRADY-WELIKY: I agree with everything
that has been said. I would just like to follow up
a bit on what Dr. Nelson said, which is
that the
Columbia study actually showed us a great
deal
about the role of narrative reporting,
and I would
think it is very important that we look
at, for
future studies, guidelines for those
narratives so
we have further information.
DR. GOODMAN:
Thank you very much, Tana.
Dr. Ebert.
DR. EBERT: I also agree, that the
classification I think was reasonable,
and I
commend the investigators on that. As far as the
analysis, just one brief comment, and
that again I
think the analysis was appropriate, but
again we
have the caveat of the studies themselves
being of
somewhat questionable quality, and the
variability
180
of quality probably is hard to establish.
Having said that, when the
studies are
analyzed, they are analyzed based on
weighting
those studies on their size, which
therefore gives
the greatest weight to the larger
studies, not
necessarily knowing whether those are the
highest
quality studies.
DR. GOODMAN: I like your last point.
Dr. Gibbons.
DR. GIBBONS: Clearly, there has been a
lot of excellent work done both in terms
of the
classification and in terms of the
analyses. I
think in terms of the integrity of these
data, the
classification has gone about as far as
you can
milk the data for, and I am not sure that
we really
need to do much more in that regard.
In terms of the analysis, I
think that the
analyses are very thoughtful, but I don't
think
they have addressed the critical question
that they
were intended to address.
I am reading from the summary
minutes of
the February meeting, that "Since we
are in the
181
preliminary stages of designing an
appropriate
analysis of patient level
data"--blah, blah, and
then it goes on, the analyses that are
presented so
far are not really analyses of patient
level data.
They are combinations of risk ratios in a
meta-analytic framework from study to
study. They
are not patient level data.
The survival analyses that were
done, to
some extent, are patient level analyses,
but those
analyses are not adjusted for the effects
of
covariates, and I really think there may
be more to
these data than what we have seen, and
would offer
that we should have a look at the data,
and I would
be happy to do that.
DR. GOODMAN: So, you are making a
suggestion that there is opportunity for
continued
mining of the data, and maybe we can put
that in
sort of our parking lot and return to it
as we get
to the recommendations.
DR. GIBBONS: Yes.
DR. GOODMAN: Any comments from the FDA
regarding the analytic questions that
were raised
182
just now?
DR. LAUGHREN: We would be happy to share
the database, it is not a problem.
DR. HAMMAD: Regarding the fact that there
is no apparent patient level data,
examining the
confounding on trial level was done based
on the
patient level data, and also, as you
said, time to
event also utilized the patient level
data. Also,
examining the interaction in all trials
by the
certified analysis used the patient level
data, but
there might be some other things to be
done putting
everything together.
DR. GIBBONS: I don't have necessarily any
expectation that a different analysis
would yield a
different result, and I don't have any
criticism of
the analyses that have been done. In fact, given
the time frame that were available, you
have gone
way beyond any of my expectations, but I
do have a
few ideas of how the data could be
analyzed in a
different way, that might shed a slightly
different
light.
DR. GOODMAN: Thank you.
183
Dr. Pine.
DR. PINE: Beyond the general comments
about the outstanding nature of the work,
I guess I
would make only one other comment, and
that relates
to some discussion between the last
meeting and
this meeting, about the degree to which
these
analyses were necessary or appropriate,
and I guess
I would only just speak for myself to say
that I
found them both helpful and in some ways
necessary
to really inform on the next question
that we are
going to deal with.
Again, just speaking for
myself, I feel
far more comfortable being able to talk
about the
second issue concerning is there or is
there not a
signal, having seen the outstanding
quality of the
work that was done.
DR. GOODMAN: Jean Bronstein.
MS. BRONSTEIN: I have nothing further to
comment about the study although I really
thought
the analyses done with Columbia really
helped me
better understand this issue than I did
in
February.
184
I do at some point want to
speak about
warnings and what I heard from
yesterday's
testimony, and I think it really comes
under the
next question rather than this one, so I
will hold
that for then.
DR. GOODMAN: Thank you.
Dr. Rudorfer.
DR. RUDORFER: I would like to second the
excellent quality of the classification
project. I
wonder if there is room to more formally
include
informant information.
I am thinking particularly in
some of the
coding, which have been described as
softer, for
instance, suicidal ideation, should there
be a
subcategory of suicidal ideation that is
validated
by a family member as having been
expressed as
opposed to just expressed by the patient.
DR. POSNER: Ideation is not typically one
of the categories that you would feel
even the need
to be validated by a family member,
because it is
what is going on in their head, so
usually, the
most valid indicator of it is the child
or
185
adolescent.
I understand what your comment
is in the
narrative. Some of the narratives said, you know,
mom said that he said this, or the doctor
just
said, you know, indicated what was said,
but there
is no way to further break that down at
this point
with the limited information that we
have.
Again, I think it becomes more
relevant
just from our assessment standpoint in
terms of
behavior than ideation, having the
supplementary
informants.
DR. RUDORFER: Thanks.
The only other
thing I would add is just to
re-emphasize--and
again this is not a problem with the
classification, this was a problem with
the
underlying data--that your outcome was
only as good
as the data that were available, and I
think we are
all faced with that conundrum that those
data seem
to be rather incomplete and inconsistent.
DR. POSNER: It is true, but I wanted to
highlight, in your handouts, you see the
first
example I gave yesterday of the suicide
attempt
186
that was clinically impressive, where the
patient
took 100 pills, you have a very detailed
narrative
in your handouts.
It is important to note that
every one of
these narratives, many of the narratives
had a lot
of supplementary information, and that
was what was
so crucial about having suicidal experts,
because
they can take all of that supplementary
information
and say, yeah, this looks like a suicide
attempt
given everything that we have.
So, I just think it is
important to
highlight that there was a significant
amount of
surrounding information even though
stated intent
was very often not there.
DR. RUDORFER: Right.
No, I appreciate
that, and I commend you for that. My concern
remains with, say, the placebo-treated
subject who
walks in and verbalizes no complaints,
and then the
rating process goes on and no one ever
discusses
any surrounding issues because there
doesn't seem
to be any cause for it.
DR. POSNER: Right, we can never make
187
sense of something that is not there.
DR. RUDORFER: Right.
DR. GOODMAN: I have already rendered my
opinion, I will just add by saying that I
was not
prepared to answer Question 2 at the last
meeting,
but I am now based upon the
reclassification.
Dr. Chesney.
DR. CHESNEY: The good news is that I have
no further comments about the analyses
other than
what the rest of the panel has said.
I was struck yesterday, as I was in
February, by the reports of the parents
of a number
of children who never expressed suicidal
behavior
or ideation, and yet proceeded to commit
suicide,
and my second point has to do with other
injurious
behavior.
We have looked at
self-injurious behavior,
we have looked at obviously suicidal, but
we
haven't looked at aggression, hostility,
all of
those aspects of the activation syndrome
that we
talked about in February.
The thing I feel relatively
good about,
188
however, is that I think, had we looked
at those,
it would have only strengthened the
results that we
have already seen, so those are my only
comments.
DR. GOODMAN: Thank you.
Dr. McGough.
DR. McGOUGH: I just agree with the
Chair's comments.
DR. GOODMAN: Ms. Griffith.
MS. GRIFFITH: I would endorse that, too,
and I agreed with Dr. Gibbons that the
classification has gone about as far as
it could,
but I have a very quick question for Dr.
Hammad,
because at the February meeting, you
raised the
possibility that the data might not be
robust
enough to render any conclusions, and
your
formidable presentation yesterday, I
suspect gives
you confidence, but I would just like to
know if
you, indeed, feel that this is robust
enough. I am
asking you a very subjective question, I
am sorry
to put you on the spot.
DR. HAMMAD: Yes, you are right, it is
subjective. Of course, it depends on what
do you
189
mean actually by "robust"
here. I think if you
look at the individual trials, for
example, you
feel that there is nothing going on,
there is
nothing significant on its own, but when
you see
how consistent the signal is coming from
most
trials, putting this in the context of
what the
rest of the process is, which is the fact
that we
know now we have every event that is out
there, as
well the public testified, and you still
see it,
then, you can feel more comfortable about
the
findings.
So, I agree with the comment
that were
said before about the level of comfort
that is
definitely much better than it was in
February.
Also, the sort of things like
the
information we have on discontinuation,
for
example, also about the history of
seratin [?], I
mean these two factors alone could have
made the
results one way or the other, and if we did
not
have information about those, and we had
not tested
them, we would have spent a long time
trying to
speculate how much actually impact we
have.
190
So, we also got this out of the
way, the
obvious, clear potential explanation for
the
apparent risk. So, I think what we are saying now
is true.
MS. GRIFFITH: Thank you.
DR. GOODMAN: Dr. Leslie.
DR. LESLIE: I just want to say thank you
for the work you did.
DR. GOODMAN: Dr. Robinson.
DR. ROBINSON: In terms of classification,
I just want to second what most of us
have said,
which is that I think the FDA and the
Columbia
group did as good as they can with the
data that
they had.
Just two comments. One is that in terms
of going forward, and Dr. Posner might
obviously
have ideas about this, is that the
Columbia
classification was obviously done in
terms of what
you could get out of very limited data,
and in the
future, sort of going forward in a
prospective sort
of manner, you might have a different
classification or you might have a scale
that had
191
additional items which might be very
important,
which you couldn't get from retrospective
data.
So, I think we still need to
think about
that you can, for prospective studies, do
something
maybe that is even better.
DR. POSNER: I just want to clarify one
thing, and it is a very important
point. This
classification scale and scheme really is
about
concepts and definitions, so we defined,
suicidal
attempts were defined like this. We took the data
and put it into that category using that
definition.
Then, there are the measures
that you use,
the tools, to ask the questions to
ascertain that
information to be able to know whether
that
definition applies. So, we do have those measures
and tools that aid in this classification
that will
hopefully inform all of the studies going
forward,
as you are pointing out.
So, the whole system really
involves two
elements, right, the tools in which
people and
clinicians and industry need to use to
ask these
192
questions of these patients and families
to find
out whether or not, where they go in this
classification scheme.
Does that clarify it somewhat?
DR. ROBINSON: Yes, but, for example, like
in preparatory acts, you have preparatory
acts
where the person stops themselves versus
somebody
else stops themselves, and often from a
clinical
point of view, you know, it is like my
child had
the rope up and I saw them and I stopped
them, as a
clinician, that has a very different
thing than
somebody saying, well, I was going to do
this, and
I got the gun out, but then I told
myself, no, that
is wrong, and I went to my family.
Again, for going forward, you
might make
some refinements. I am just saying not necessarily
have this set in stone, because this is
obviously
done for something that is sort of
retrospective.
DR. POSNER: But what I am saying is we
have an assessment tool, for example,
where all of
those questions, the clinician has those
questions
in front of them, so have you ever done
anything to
193
hurt yourself where you wanted to die,
have you
ever started to do something and stopped
yourself,
and then they get that information with
those
definitions and the probes and the
questions, and
then they can then go and decide there
was a
preparatory behavior or there was a
suicide
attempt.
So, all of those distinctions
and
questions and helpful aids, we have
certainly been
working on and intend to hopefully
distribute and
even have guidelines and training days,
so that
people can start to use these in their
studies.
I just wanted to add to two
comments I
heard about we have to look broader at
more of the
other symptoms that we are talking about
and
worrying about, like akathisia,
agitation, and
aggression.
The study that I keep talking
about, for
example, the Adolescent Suicide Attempter
study,
that is NIMH-sponsored, we are working
very hard on
measures and tools to look at all of
these side
effects that are associated possibly with
SSRIs
194
including all of those things - how to
ask the
questions, how to collect it, so
hopefully, we can
have tools and we can also answer some of
these
related questions.
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: I would agree that the
reclassification and analysis were both
clinically
and scientifically appropriate. I found them to be
rigorous.
I was impressed with the blinding
procedures and would echo the thought for
future
randomized, controlled trials, in
conjunction with
the FDA, that there be some type of
standardized
classification that is mandated across
all studies.
DR. GOODMAN: Thank you.
Dr. Irwin.
DR. IRWIN: I agree and I would just like
to second what Dr. Chesney raised in
terms of the
issues of aggression and violent
behavior. They
don't seem to be a part of this
instrument right
now.
Thanks.
DR. GOODMAN: Ms. Dokken.
MS. DOKKEN: I agree with the intent of
195
the previous comments.
DR. GOODMAN: Dr. Newman.
DR. NEWMAN: I do, too.
DR. GOODMAN: Dr. Wells.
DR. WELLS: I think we have done about as
well as we can do with the
reclassification and
with the re-analysis. We recognize, of course,
that the data aren't perfect, having
largely to do
with how they were elicited.
I don't think that there is
very much more
that we can do with the data, although
there may be
a little bit more. I recall that Dr. Mosholder,
for instance, had recommended that we
might want to
do an analysis using inpatient
hospitalization as a
primary outcome and see what is picked up
there.
We remain troubled by the
inconsistencies
across the studies, even for specific
drugs, we
don't understand what accounts for those
inconsistencies, but I think at this
point, we need
to move forward and see if there is some
decisions
that we can make with the data that we have.
DR. GOODMAN: Thank you.
196
Dr. Pollock.
DR. POLLOCK: Yes, it's a question was
there ever or is there any plan for this
kind of
patient level, at least to sample,
because of the
concerns about ascertainment in the adult
studies,
if there was any contemplation or has
there been
any probing at all of the quality of that
data.
I mean we have some confidence
in your
overall conclusion, but we don't have
confidence,
or at least the public doesn't have
confidence for
some of those adult studies, what was
actually
recorded, and if it might be certainly in
the
public's interest to conduct at least a
quality
sampling using the same methodology in
the adult
studies.
DR. LAUGHREN: As I indicated yesterday,
right now our focus is on the completed
suicides
that we have in this very large database,
and we
can consider this second issue, but I
think right
now we are going to try and finish up
with looking
at the completed suicide data.
DR. GOODMAN: Dr. O'Fallon.
197
DR. O'FALLON: I agree with what has been
said by the rest of you, I am not going
to argue
with any of you, but I am still--I think
there are
a couple of issues here.
One of them is that I don't think that
this re-analysis has done very much about
looking
at that question about the association
between
adverse events and dose changes. I think there may
have been problems. At least I didn't see very
much about that. Maybe I was missing it.
I think I am still very
concerned about
the possibility that we might be
underestimating
the incidence of these adverse events,
the suicidal
ones.
I am afraid of it because if we get the
answer wrong, we could have a very bad
effect upon
medical practice. That is always the issue here
with doing research.
Obviously, there wasn't very
much power to
detect, I mean it's a rare event, thank
God it's a
rare event, suicidality, but there isn't
a whole
lot of power to pick it up under the best
of
circumstances even with the
meta-analysis.
198
I think I have asked this
question twice,
and I think the FDA needs to address
upfront the
charges that I heard over and over again
that the
FDA doesn't have all the data, that
somehow or
another the companies are holding back
data or
suppressing it from you.
I think that is something that
has to be
made clear to the public. You have said no, if
they put in an application, we get every
shred of
data they ever had even if it was 25
years old.
But there is a perception out there that
I think
the FDA has to address.
DR. GOODMAN: I am not sure if those
comments are germane to the question at
hand. You
may want to hold them for later.
DR. O'FALLON: Okay.
DR. GOODMAN: Dr. Santana.
DR. SANTANA: I also agree that clinically
and scientifically, you have done the
best that you
can with the data that you have. I do want to move
forward, though. I mean this classification system
is an event-based, outcome system, but it
really
199
doesn't get to the issue that I would
have if I was
a practicing physician in this area,
which is, is
this toxicity or is this lack of
response, does
that lead to that common outcome.
So, as you develop your new
tools, your
new questionnaires, whatever you are
going to do to
validate this classification and take it
forward to
new studies, I would want you to pay some
attention
to try to dissect how that common outcome
is
related to either toxicity or lack of
response,
because I think that would be important
and would
address some of the issues that the
parents and
families had, you know, that they were
attributing
it to toxicity, whereas, some of us may
interpret
that it actually was a lack of response.
DR. GOODMAN: Thank you very much.
Dr. Wang.
DR. WANG: I agree these were very strong
process and results. I do have two small
suggestions to bound the lingering
questions we
have about case ascertainment. The first is how
many cases may have been missed by the
sponsor's
200
screen and never sent, and for that, you
might
consider an audit of what was not sent,
you know, a
sample of that.
The second is the potential
ascertainment
bias due to this unblinding by side
effects, and
you could check for this by seeing
whether an
adverse event known to be unrelated to
antidepressants was elevated in the
antidepressant
versus placebo arms. It would just at least give
us a sense of the potential magnitude of
either of
these two problems.
DR. GOODMAN: Dr. Gorman.
DR. GORMAN: I would like to echo the
generally positive comments about the
reclassification as being helpful to
especially
myself to understand the data, and that
would then
lead to a compliment to the Office of
Drug Safety
both at the global level and the
individual level
for recognizing the signal through all
the noise
when the data was not classified in a way
to make
it as clear to them as it is now to us.
The ascertainment of the cases, I think
201
would make the signal stronger in
general. I think
all the errors we are worried about, in
general,
about how much information has been
presented in
the narrative, might, in fact, make the
signal
stronger and therefore, while I recommend
to the
FDA as a comment to this that I hope this
classification system becomes generalized
across
all your therapeutic areas, that the
active
ascertainment for suspected or serious
adverse
events in all classes become active and
done in a
way that allows us to not be arguing
whether we
have got as much of the signal as there
is to get.
DR. GOODMAN: Thank you.
Dr. Maldonado.
DR. MALDONADO: I just have a couple of
questions, but I agree with the general
consensus,
and the questions are based on these
tools that
have been developed. As you know, the tools are as
good as the ones who use the tools. It is
still not
very clear to me who is going to be the
end user of
the tool.
I actually congratulate Dr.
Iyasu for
202
doing the reproducibility and reliability
within
the FDA.
I am glad to see that the FDA is doing
its own studies, too. And then who are going to be
the end users, is it going to be the
medical
officers on DDP who are going to be doing
this
classification, or is it going to be the
requesters
from the sponsors, or even primary
investigators?
The more you spread that, the
more
variability you have to expect, and then
the study
that Dr. Iyasu did might not be relevant
depending
on the user.
The other thing, maybe Dr.
Posner can tell
us, where the publications for the
validity of
these questionnaires and classifications
are,
because again these tools are so
dependent on their
validity.
I am not in this field, so they may be
published and people know, but I have
never seen
them, or maybe if they are not published,
are they
going to be published, so people know the
validity
of these two tools.
I am not just referring to a
classification, but also to the
questionnaires that
203
you mentioned.
Thank you.
DR. GOODMAN: Dr. Mehta.
DR. MEHTA: I think the FDA has done a
great job of classifying data with very
poor case
of confirming information. I would go one step
further, and that is, request FDA to
design a case
that could confirm suicidality and also
together
with a set of instructions, and give it
out to
every sponsor from now on, because I
suspect that
this issue we will be revisiting 10 years
from now.
I think Dr. Gorman and Dr.
Posner also
commented essentially the same thing.
DR. GOODMAN: Are you going to give the
references?
DR. POSNER: No, I was just going to
reiterate that we have commented many
times that we
are going to write guidelines just to do
that for
industry and everybody else.
DR. GOODMAN: We can't hear you.
DR. POSNER: I was just reiterating again
that we, in collaboration with the FDA,
are going
204
to write guidelines for better
ascertainment. I
think we should also have training meetings. We
discussed this yesterday. Whatever we can do to
make this consistent across everybody who
is going
to be doing this kind of work.
DR. LAUGHREN: Right, and that applies to
both the classification and the
ascertainment.
DR. POSNER: Right.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: A classification scheme like
that is presumably what a company would
do,
probably with a special group set aside
to do it in
a blinded way, to evaluate the data they
have got.
One other observation I want to
make is
that one of the ways we try to focus on
things that
are important is to look closely at all
the people
who leave a study prematurely in
association with
an adverse reaction, and the narratives
associated
with that are one of the things medical
reviewers
look at most closely.
We also get a fair sample of
dropouts that
were said to be for administrative reasons to
see
205
if underlying those there is actually an
adverse
reaction, because sometimes you want to
check those
things.
So, that is one of the ways you go
looking
for things you don't know enough to
expect, see
what happened in those people.
DR. GOODMAN: Thank you.
I want to conclude our
discussion. You
can take a seat. Thank you.
There, you have our
comments. I think it
is pretty straightforward. There was a great deal
of agreement that you can't imagine a
better job
being done given the starting point.
Naturally led to discussion about what to
do in the future, and I think there are
some
excellent suggestions there, not only for
the FDA,
but the field in general in terms of
improving our
ability to detect, ascertain suicidality
and
perhaps other symptoms that might be
relevant and
help us sort out whether we are dealing,
as was
said before, with toxicity versus an
indication of
ineffectiveness.
206
So, I think that in the future,
hopefully,
we will be ascertaining and classifying
these data
in a prospective fashion, and obviously,
a lot of
the details need to be worked out about
who will be
doing what part of that job.
With that, we should head to
lunch, return
at 1:00 p.m. to tackle the remaining
questions. A
reminder, once again, this should be
ingrained. Do
not discuss meeting questions during the
lunch.
Thank you.
[Whereupon, at 12:02 p.m., the
proceedings
were recessed, to be resumed at 1:00 p.m.
207
A F T E R N O O N P R O C E E D I N G S
[1:00 p.m.]
DR. GOODMAN: Would everyone take your
seats.
First, a housekeeping
matter. Anuja Patel
will be passing around a sign-up sheet,
so that we
can know if you need a taxi and at what
time. I
assume you want that returned to you,
Anuja, after
it has made its way around the table.
We are now entertaining the
second
question before us. It is presented there up on
the screen. I will read it.
Do the suicidality data from
these trials
support the conclusion that any or all of
these
drugs increase the risk of suicidality in
pediatric
patients?
Now, what I would like to do is
first have
a discussion of the question, give you an
opportunity to ask any further questions
of
individuals from the FDA who presented
yesterday
that have bearing on this question.
Then, we will, following that
discussion,
208
go around and ask for your votes. You choices are
Yes, No, or Abstain, and you are
permitted to have
30 seconds, not much more, to explain the
rationale
for your vote.
So, first, we are going to have
a
discussion. This will be the opportunity to see if
we can extract any additional
information. I also
wish to point out that there are four
members of
the committee at the table who are
non-voting
members.
We welcome them to participate in the
discussion phase, but obviously, will not
be
participating once the vote commences.
Their names are Dr. Mehta, Dr.
Maldonado,
Dr. Gorman, and Dr. Wang.
In posing this question, I had
a few
comments, and maybe a question to the FDA
in terms
of clarification.
First, I had mentioned earlier
that there
is some lack of clarity about the
definition of
suicidality. In fact, as we can see on the other
screen, although there is quite clarity
there, you
can set the brackets either narrowly or
broadly in
209
terms of what we mean by suicidality.
For the most part, in the
analysis that
was presented yesterday, the definition
of
suicidality corresponded to Outcome 3,
which
included evidence of suicide attempt,
preparatory
actions or suicidal ideation.
So, I think before we take a
vote on that
question, there should be some discussion
and maybe
some guidance from the FDA, as well, is
which
definition of suicidality are we adopting
for the
purpose of that vote.
Second, I wanted to note that
if we are
basing the information exclusively on the
clinical
trials, as stated explicitly in the
question, we
have no instances of suicide, so we would
not be
concluding anything about suicide, only
the risks
of suicidality, not completed suicide.
My feeling is--again, I pose
this to the
FDA--we cannot ignore the other
information we
heard from the public testimony about
cases of
completed suicide, and obviously, those
are not
from the trial, yet we can in some ways
extrapolate
210
from the ideation and behaviors in the
trials to
the risk of completed suicide that
perhaps would
exist in the absence of a carefully
controlled
environment, such as is the case in a
clinical
trial.
So, maybe I could start by posing
the two
questions to the FDA. One has to do with which
definition of suicidality should we be
entertaining, and, secondly, should we
limit this
answer to what we know from the clinical
trials.
DR. LAUGHREN: Our intent was that you
focus on Outcome 3. That was our primary endpoint
in the trials, so that is what we
intended by
suicidality. I think for the purposes of this
question, we would like you to focus on
the
clinical trials.
I mean you can subsequently
address data
from other sources, but we are primarily
interested
with regard to this question on the
clinical
trials.
I agree with you that it applies to
suicidality, not completed suicide,
because
obviously, there weren't any completed
suicides in
211
these trials.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: The difficulty in dealing
with the question of completed suicides
is that
while, unquestionably, some of the cases
reported
sound pretty interesting and persuasive
on the
point, you have no idea how persuasive
the decrease
in suicide that other people alleged, how
large
that is.
So, how to say whether there is
a net
benefit or harm on completed suicides
certainly is
unclear to me. Those data are very hard to analyze
quantitatively. That is not the same as saying
that some people don't seem to get worse
when they
are on these drugs, but some people seem
to get
better also. So, how to put that in numbers that
addresses that question, increasing, say,
the risk
of suicide, that seems very hard to do.
DR. LAUGHREN: I guess another
qualification here is that obviously,
this is a
very small window in time that we are
looking at.
These are short-term trials. I think it has to be
212
focused on that window in time for which
we have
data.
I mean in my view, that is really the
question.
DR. GOODMAN: Other comments from the
committee?
Dr. Nelson.
DR. NELSON: The question I had, let me
just be clear, because I think might have
been
answered by your response, because the
way the
question is framed doesn't say anything
about the
timing of the suicidality and some of the
discussions of early versus late, and
questions of
late decreases, et cetera.
So, by restricting the answer
to this
question to the data at hand, the way I
would
interpret it is it is to speak directly
to the
early possible increase in signal that is
seen, not
to the broader questions, which then
would come in
to play perhaps in tackling Question 4,
where the
risk-benefit becomes an issue.
So, I state that as a comment,
I guess, in
order to make sure that I am interpreting
what you
213
have said correctly, because I was going to
ask
about how this would be focused on the
early versus
late kind of issue that has been part of
this
discussion.
DR. GOODMAN: Dr. Ebert.
DR. EBERT: Just another clarification for
my purposes, and when we talk about this,
I am
assuming we are talking about an
increasing risk
compared with placebo as opposed to an
absolute
increase in risk, because obviously, that
would
also take into account the potential
efficacy of
the drug.
So, in fact, we might be, if
the drug is
efficacious, seeing a net reduction in
suicidality,
but we are talking here about comparing
it with a
placebo.
DR. GOODMAN: I would agree with that
interpretation.
Dr. Irwin.
DR. IRWIN: Is there a word suicidality?
DR. GOODMAN: Every time I write it in
Word, it gets red underlined.
214
DR. IRWIN: It seems to me, I mean to me,
I am not certain anyone really knows what
it is
that we are saying and what you are
voting on, or,
to me, I would like to know what
suicidality is.
DR. GOODMAN: I don't think it is in an
Oxford Dictionary either.
MS. GRIFFITH: It is not in Webster's.
DR. IRWIN: In a sense, it confounds
things by, you know, the front page of
the paper
today, I think may lead to kind of a
misrepresentation.
DR. POLLOCK: Can't we just use the
explicit language?
DR. GOODMAN: That is, in part, what I
would favor, is that if we use it, I
think we need
to at least parenthetically define what
we mean
when we are answering the question.
Dr. Temple.
DR. TEMPLE: Yes, that is what we do. I
think that is what we actually did in
labeling.
Whether we should coin a new word is
debatable,
obviously, but it means suicidal behavior
plus
215
suicidal ideation. That is what we use it to mean
as those items.
DR. GOODMAN: Would it be fair for us to
slightly modify the question, or do we
have to take
it as it is, because what I would say, if
we could
use the definition that corresponds to
Outcome 3, I
would feel most comfortable, because that
corresponds to the reclassification and
the way you
approach the dataset.
So, suicidality, suicide
attempt,
preparatory action/or suicidal ideation.
DR. KATZ: Yes, you can certain amend the
question.
We called it suicidal behavior and
ideation, but it is clearly what is
embodied in
Codes 1, 2, and 6.
DR. GOODMAN: I think we have a
clarification on that and hopefully, the
public
will understand what we mean, too, and
that, I
think we will leave it to the press to do
their job
in trying to best define what we mean and
don't
mean by that term, specifically, that we
are not
talking about actual completed suicide if
we are
216
restricting our deliberations to the
clinical
trials, because there weren't any
instances.
Dr. Perrin.
DR. PERRIN: I would like to ask a related
question to help me understand how to
approach this
vote, which is really not the analysis,
but the
trials themselves and some I think fairly
brief
questions.
My understanding from reading
the reviews
in Dr. Dubitsky's presentation yesterday,
and from
Dr. Hammad's review, that these are very
diverse
populations in these trials, only
variably well
described, so we don't really know what
percentage
of these young people actually had major
depressive
disorders even in the MDD trials.
We know very little about
comorbid or
co-existing conditions in them. Although they
describe what the inclusion/exclusion
criteria are,
we know relatively little about the
concomitant
treatments for them.
Again, as I read the
descriptions, they
are a lot of drugs that they might have
been on
217
were excluded, on the other hand, about
three-quarters of all the samples were on
some
concomitant treatment of some sort or
other.
So, I take it, if I am reading
this right,
a very diverse, hard to consider similar
populations across the multiple trials,
which might
be the explanation for why nefazodone had
absolutely no events in 450 subjects.
I am really asking the question,
am I
right in this reading, and, if so,
because that
would help me understand more about the
strength of
the signal given incredibly diverse
samples.
DR. GOODMAN: Perhaps Dr. Dubitsky, is he
here, could answer that.
DR. DUBITSKY: I am not quite sure how to
even begin. It is a very complex question, and it
is very relevant. The diagnostic criteria did span
anywhere from DSM-III up to DSM-IV,
including
DSM-IIIR, but beyond that, I think as I
alluded to
yesterday, you know, some studies did use
more
extensive diagnostic screening
procedures, and it
is to me very unclear as to what role
that may have
218
played in creating some diversity among
the trials.
I think you mentioned the issue
of
concomitant treatments, and it is true
that most of
the patients did receive some kind of
treatment, be
it
something as simple as aspirin or another
antidepressant during the trial.
I think, in general, the
treatment with
concomitant antidepressants other than
the study
drug was fairly rare, but you can go on
from there,
because you do have antipsychotics and
all kinds of
other non-psychotropic medications,
non-psychiatric
medications that do have psychotropic
effects, and
it becomes very, very complex trying to
sort that
out in terms of what the medication was,
what the
actual psychotropic effect was, what the
timing
was, how that may have influenced the
outcome of
interest.
So, I don't have a good answer
for that.
DR. GOODMAN: I think there were some
differences you pointed out and the
degree of
structured interviews that were
conducted, so that
may account for some heterogeneity.
219
I think even if the criteria were
uniform,
the inclusion/exclusion criteria were
uniform
across the studies, which they weren't, I
do think
there is a great deal of heterogeneity,
which has
to do with the limits of our ability to
characterize major depression in
children.
DR. PERRIN: In that context, I think it
is also, we have heard the real
difficulties in
distinguishing major depression and
bipolar
disorder in these populations.
I guess the point that I think
you are
supporting is very diverse populations,
nonetheless, a very persistent signal
despite very
different populations.
DR. DUBITSKY: I think it is quite
possible that the population was very
heterogeneous. Again, to what extent that is
actually the fact, I don't really know,
but there
is a distinct possibility.
DR. GOODMAN: Thank you.
I want it to be clear and make
sure that
we all agree at this point and understand
that as
220
we answer this question, we are
restricting our
data to the clinical trials. I think that is the
intention of the FDA. I think that is reasonable
as long as we understand which question
we are
asking.
We are not asking the broader
question
based upon other data that has been
brought to our
attention, strictly what can be gleaned
from the
clinical trial data.
But I will entertain any
discussion of
that point.
MS. BRONSTEIN: As I listened to the
reports on the studies and also listened
to the
public testimony, I think some of the
public
testimony really highlights the necessity
to look
carefully at the trials.
The public is asking us very
succinctly to
warn them, and I think we have done some
since last
February, and I think we need to even do
more in
the way of maybe even informed consent
and using
family members as partners even more than
we have
in the past.
221
But I want to harken on what
Nami talked
about a little bit yesterday and some of
the
clinicians that spoke. I am most concerned about
access for children to all of the kinds
of things
that are available even with the known
risks.
I guess, as somebody who is
very concerned
about the consumer, I really want to
focus on what
the signal is in terms of giving warning,
not
necessarily restriction.
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: I certainly agree with,
for example, the next question focusing
on the
clinical trials, that really is a
clinical trial
question of what we know from the current
data.
I think when we get to broader
questions,
for example, should these antidepressants
be
contraindicated in children, I think it
is almost
impossible to address that question
without
bringing in a broader database beyond the
current
clinical trial.
DR. GOODMAN: I think that is a fair
statement.
222
I want to make sure before we
try to
answer the question that we are clear
about the
question.
I think we are at this point.
Any further clarification
needed?
[No response.]
DR. GOODMAN: Dr. Newman, I think you
wanted to add a little bit to our
dataset. I will
give you an opportunity to do that.
DR. NEWMAN: I made a slide
during lunch.
If I could have the pointer, too. When the FDA
staff presented the results of the pooled
analysis
of the clinical trials, what they
presented were
the relative risks and the 95 percent
confidence
intervals, and although if you have a lot
of
practice, you can look at those
confidence
intervals and see what the p-value is,
that does
take some mental arithmetic.
It is kind of hard to do those
logs in
your head. So, these are the four risk ratios.
They are all about two, meaning that
people who
were assigned to SSRI treatment in these
trials had
about double the risk of these suicidality
events,
223
and these are the lower and the upper 95
percent
confidence intervals, and the p-value is
sort of
the measure of the strength of the signal
meaning
how, if SSRIs did not cause suicidality,
how often
would you see a signal this strong or
stronger.
Just to show you that my little
spreadsheet way of doing it works for the
people
who
know some statistics, if the 95 percent
confidence interval just exactly hits 1,
the lower
limit, then, that means the p-value is
0.05, which
it is here or reasonably close.
You can see that the p-value,
that is the
chance of observing a signal this strong
or
stronger, the highest one is about 0.04,
and this
one here, which is the lowest p-value,
because the
sample size is the biggest, because we
are looking
at the possible events, as well as the
definite
ones.
This is Outcome 4, and in all the trials,
not just the MDD trials, is about 5 in
100,000, so
this is a signal strength that would
occur by
chance about 1 in 20,000 times.
I think this is important
because many of
224
the concerns that have been expressed by
members of
the committee would be to a loss of
power, they
would lead to we are not capturing all
the
suicides, we are not sure that all we
have is
suicidality, and heterogeneity, and maybe
they
didn't even have the right disease and
sloppiness,
all of those would tend to make the
p-value higher.
So, I actually think the way the question
is phrased, which is does it support the
conclusion
is actually a little bit weak. I think we could
phrase the question, it would be much
stronger
about the data.
DR. GOODMAN: Thank you.
Dr. Nelson.
DR. NELSON: Thank you for doing that, but
I got the impression yesterday when you
suggested
that, that a little statistical skirmish
broke out,
so I am interested in hearing from the
other
statisticians around the table just what
they think
of this approach.
DR. NEWMAN: Actually, I talked to Dr.
Hammad ahead of time. Did you want to comment?
225
Okay.
If the other statisticians would like to
look at this, or I could open up the
spreadsheet
and show them, but I really, I don't view
this as
controversial. If there are people that do, then,
I would like to hear from them.
DR. GOODMAN: Dr. Gibbons.
DR. GIBBONS: The computation is based on
the fact that these are asymptotic
confidence
intervals, that is, you are assuming
large sample
theory and assuming normality of the risk
ratio,
and that is how Dr. Hammad did the
computation, so
the probability values fall directly out
of it.
Of course, it makes sense that
when you
are right on the boundary of 1, the
probability
should be 0.05 or close to it based on
the 95
percent confidence of the asymptotic
normal limit.
So, these p-values are
reasonable, but be
careful about p-values. One of the reasons why
people use confidence intervals is to
describe an
effect size, and a very small difference
in an
effect size in a large sample will give
you a
probability value that is very, very
tiny.
226
So, don't interpret the
difference between
0.05 and 5 times 10
-5 as being a huge difference in
effect size, but at the same time, if you
are
worried about things like multiple
comparisons,
like, hey, they went out and did a bunch
of tests
and some of these are probably happening
by chance
alone, you look at a value of 10
-5, you
can do an
awful lot of comparisons.
We are all born with a fixed
number of
degrees of freedom, and if you use them
up too
quickly, you die a painful death, but
that protects
you pretty well.
DR. GOODMAN: Thank you very much. That
is the best explanation I have heard of
that yet.
Thank you.
Other committee members? Dr. Katz.
DR. KATZ: I just want to comment on the
last comment. It is true, I suppose, that 5 times
10 -4 or 10-5
protects you against a lot
of
multiple
comparisons, but 0.04, which is the
p-value, the
normal p-value for Outcome 3 for SSRIs
and MDD, and
we haven't yet gotten to the point to
which a
227
population should any conclusion apply,
but the
0.04, in the face of lots of multiple
comparisons
perhaps is a different kettle of fish.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Tom, maybe a follow-up. As
far as the p-values go, if I humbly
understand it,
you know, worrying about Type 1 error, we
are
worrying about calling something
different when it
is not, but I think the problem is the
other way.
I mean I am more concerned of
missing
something that is there. I am more concerned about
Type 2 error, and is there any light to
be shed on
that, or are we just comfortable enough
that we
have got a signal, we keep the signal, or
is there
some way we can infer if we are missing a
signal?
DR. NEWMAN: The Type 2 error refers to
that you have failed to find something
which is
really there, and I would submit that
these
p-values are very, very low, and so we
have found
it, and it is there. When the p-value is 5 times
10 -5, power is not the issue at
all.
You
had
abundant, abundant power to find that
because you
228
found it with such a very, very high
level of
statistical significance.
DR. GOODMAN: Is there any more data that
people feel they need to see before
answering this
question?
Again, the data from the clinical
trials, not research you would like to
see
conducted.
Dr. Pine.
DR. PINE: Just two brief comments, one
related to what you just asked and
another related
to the other issue, and it relates to a
conclusion
that Dr. Laughren gave when he was
summarizing his
kind of directions to the committee, and
that is
the idea that one might use a different
statistical
threshold when making conclusions about
safety as
opposed to when making conclusions about
efficacy,
so while 0.05 has become kind of a
magical number
for whatever reason, that is usually in
the
discussions about efficacy, and I just
wondered if
he would, you know, comment if his
statements
really apply to this exact situation.
DR. LAUGHREN: My interpretation of the
229
regulations is that we don't need the
same level of
certainty, so I think it applies directly
here.
DR. PINE: Then, the only other comment I
would make, and this might affect the
question or
it might not, and it relates to your
statement
about other data from other trials.
As far as I know, there are no
other
randomized, controlled trials of SSRIs in
pediatric
depression. There are other trials of pediatric
anxiety disorders, and, you know,
discussing them
for safety right now, I know is not
really the
issue before the committee, but I think
that there
has been a hint from the analyses that
have been
done that perhaps the signal, so to
speak, is
particularly strong in children who are
suffering
from major depressive disorder.
I would just think it would be
important,
if we were to go beyond major depressive
disorder,
to be sure to look at trials that have
not been
discussed, that are federally-funded
trials in
particular as opposed to
industry-sponsored trials.
DR. GOODMAN:
Dr. Temple.
230
DR. TEMPLE: The analyses that Dr. Hammad
presented include all of the trials we
know about
including trials that are not in major
depressive
disorder, only 15 of them, or one more
with TADS,
and the signal, as the previous slide
showed,
actually looked slightly stronger when
you add the
trials that are not in major depressive
disorder.
What that means, I have no
idea, but that
is how the numbers sort of come out.
DR. GOODMAN: Basically, I want to echo
that.
Maybe I should clarify this point.
As I
understand this question, it applies to
all the
clinical trials, not just the major
depression
ones.
Although the numbers were
admittedly small
for some of the other anxiety disorders,
like OCD,
they were very small numbers, but when
you
aggregate the data, it adds to the
evidence of
suicidality.
DR. TEMPLE: One of the things the
committee could think about is whether
some of
those trials are more germane to this
question than
231
others.
The main analyses Dr. Hammad did included
them all.
For one thing, there is a lot
of overlap
in these things, and maybe the people
have more
than one disease, but that was the
primary
analysis, and there are, of course, more
data, more
numbers, more trials, so you have
somewhat more
information on those than you do on the
others.
Those are all good questions.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: I just wondered if before
you bring this to a vote, if it is
possible to
rewrite this, so that we are absolutely
clear what
we are voting on, and it is not only--my
concern is
not only that you define suicidality, but
also this
may to some members appear redundant, but
pediatric, as well, that we actually talk
about
clinical trials between ages of, you
know, we fixed
that, because the way the warning came
out, at
least into the field and into practice, in
the last
few months, was all patients, that there
is a risk
of increased suicidality sort of across
the age
232
spectrum, and this caused a little bit of
consternation.
While it is important that the
efforts
towards monitoring and that people be
alert in all
ages, where we have the evidence and
where we are
specifically voting, I think today is
about the
evidence base that we have in those
specific trials
conducted between certain ages, and that
is where
the data is.
I would just again feel better
if we could
just frame this question very explicitly,
so it is
not subject to distortion.
DR. GOODMAN: I certainly agree that we
should further reference what is meant by
"these
trials" in the question. Perhaps this list that
was supplied by Dr. Dubitsky covers it,
but let me
make sure that we are voting on the right
set of
trials, are they the ones that are listed
here? I
am interested in a little bit of guidance
about how
to properly reference the studies.
DR. TEMPLE:
It is clearly the trials we
have presented to you. They are all pediatric
233
trials.
If you feel that you have to say that in
there, go ahead and say it, but we will
understand
it.
Those are the trials you are
talking
about, and the database relates to
suicidality in
pediatric patients, however, the warning
you are
referring to was quite deliberately not
intended to
apply only to pediatric patients, because
it didn't
have anything to do with whether there is
an
increased risk of suicidality. That was considered
good advice for any person getting these
drugs.
You should know that sometimes people get
worse and
you should monitor them closely.
So, you might want to comment
on that, but
that was our intent.
DR. POLLOCK: It was conflated with this
stuff.
DR. TEMPLE: No doubt.
DR. GOODMAN: Any other data you want to
see, or discussion, before bringing it to
a vote?
Dr. Laughren.
DR. LAUGHREN: Just again for
234
clarification, Question 2 is intended to
follow
Question 1. Question 1 clearly states that it's
the 23 plus 1, 24 trials.
DR. GOODMAN: I apologize, I wasn't paying
attention.
DR. LAUGHREN: I am just pointing out that
Question 2 is intended to follow directly
from
Discussion Point 1, which focuses on the
24 trials
for which we have presented data.
DR. GOODMAN: So, you know what we are
referring to, we now know what we are
referring to,
so I think we are okay.
Ms. Griffith.
MS. GRIFFITH: But will the public know
what we are referring to, and when this
is
extracted for the press, it better be as
clear as
it can possibly be. Also, if I could just
reference your web site, you need to have
something
very directly speaking to this and
outlining it in
detail on the web site ASAP.
DR. GOODMAN: Further discussion before we
bring it to a vote?
235
Dr. Pfeffer.
DR. PFEFFER: Yes, I would agree with what
you just said in the sense that the
question almost
alludes to a generalizability, and I am
not yet
sure, given the discussions we had this
morning,
that we are fully ready to have very
generalizable
statements about the last part of the
question,
suicidality in pediatric patients.
I think we have some datasets
now, and we
have discussed how much they have
potential
problems, but this is the existing data
that we
currently have. So, as of today, this is our
knowledge base, so to speak, and we feel from
what
we said this morning that we need more
information
ultimately and gathered in different
ways.
So, I am not sure we can say
this is a
generalizable issue yet. So, that is the caveat I
would like to address.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I am not sure what the
reference to generalizability is. This question
refers to the 23 plus 1 trials and to the
evidence
236
that they do or don't provide about the
risk of
suicidality, defined properly, in
pediatric
patients who were the subject of those
trials.
We don't think those trials
have any
reference for adults. We don't know about the risk
of actual suicides, it is a fairly narrow
question
because those are the new data we
got. Those are
the result of the pediatric trials, and
the
question is have they told us something.
DR. GOODMAN: I understand.
Dr. Pfeffer.
DR. PFEFFER: I guess what I am trying to
say is that what I mean by
generalizability, I am
not talking about other ages, but
specifically, I
don't yet think that it clarifies all
pediatric
patients would be at risk.
DR. GOODMAN: I don't think that is the
implication of the question.
DR. PFEFFER: I am talking about the
general public.
DR. GOODMAN: It means in the trials that
were listed and presented to us.
237
DR. TEMPLE: And there could be
differences among patients in the
trials. That is
true for every effectiveness trial that
has ever
been done. You don't know as much as you would
like to.
It's in the pediatric patients that were
in these studies, not all pediatric
patients.
DR. GOODMAN: Tana.
DR. GRADY-WELIKY: I just wanted to
comment that the amount of discussion we
are having
about what the question means or doesn't
mean is
important to at least acknowledge and,
you know, we
are a group of experts in this area, so
when it
comes to the public, I think the fact
that we are
struggling with it is needed to be
commented on,
and I would agree with Dr. Pollock that I
would
like to see the final version of the
question
before voting.
DR. GOODMAN: Dr. Katz.
DR. KATZ: I just want to get back to this
question of generalizability, because we
do clearly
want to be able to say something at the
end of the
day about whether or not these results
apply to any
238
identifiable population of pediatric
patients.
If you were to conclude that,
yes, the
data show that there is an increased risk
of
suicidality in these specific particular
pediatric
patients who enrolled, but we can say
nothing
about, for example, pediatric patients
with MDD, in
general, or patients with psychiatric
disorders,
that would be quite problematic.
Generally speaking, we do take
control
trial data and we convince ourselves that
the
results apply to some relevant population
that was
not
studied in the trials. If all our
conclusions
only applied to people in trials, we
wouldn't have
very much to say about drugs.
So, there is a question we are
asking.
You can take this stepwise if you like,
but we will
ultimately want to know whether or not
you think
that these data demonstrate that there is
a risk of
suicidal behaviors or suicidality, as
defined, in
some identifiable population who in the
future or
who are currently being treated with the
drug or
drugs.
239
DR. GOODMAN: I don't think the main text
of the question needs to be changed, but
I do say
that it needs to be footnoted, so that
what I would
suggest is that the statement--the
question we are
answering reads as follows:
Do the suicide data from these
trials--and
we should put Footnote 1--as listed
in--what shall
we
call this, Dr. Dubitsky? Appendix A,
presented
by Dr. Dubitsky? Somebody give me another
way of
describing that.
DR. TEMPLE: You could refer to it as the
23 plus 1 trials referred to in Question
1.
DR. GOODMAN: Okay, that is fine with me.
So, the 23 plus 1 trials
referred to in
Question 1. Somebody is bound to ask me which 23
plus 1 trials those are, and those are in
Appendix
A listed, provided by Dr. Dubitsky. We are getting
like lawyers here.
DR. MARANGELL: All available randomized
control trials in pediatrics involving
antidepressants.
DR. GOODMAN: I think we are beating a
240
dead horse, frankly. I think we all know at this
point what we are voting on, and
hopefully, when it
gets translated somewhere that the press
and others
will be attentive to exactly the
appropriate
references.
Any other discussion? I want to get off
the question and on to information
relevant to
arriving at an answer.
Any other discussion that we
need to have
before you are prepared to make your
vote?
If not, I am going to start,
not with
myself this time, I am going to start
from that end
of the room from my first voting member,
Dr.
Santana, and then I am going to remind
you--yes,
it's you--yes, no, you can abstain, but
obviously
we would encourage you to be definitive
with a yes
or a no, and up to 30 seconds in comment
although
that is not necessary, a simple yes or no
would be
sufficient, and we are going to be
recording your
vote.
DR. SANTANA: That is why I am here. My
vote is yes, and I have no further
comment.
241
DR. GOODMAN: Dr. O'Fallon.
DR. O'FALLON: I am going to abstain. I
am looking at this data, and I don't see
that clear
signal that everybody sees.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: Yes.
DR. GOODMAN:
Dr. Wells.
DR. WELLS: Yes.
DR. GOODMAN: Dr. Newman.
DR. NEWMAN: I would vote yes and I would
even say that I think this particular
question is
weakly phrased to say support the
conclusion, and I
would also vote yes if it said do the
suicidality
data from these trials prove beyond a
reasonable
doubt--
DR. GOODMAN: Now, we are really becoming
lawyers.
DR. NEWMAN: -- increase the risk of
suicidality, because I really think it is
definitively shown.
DR. GOODMAN: Ms. Dokken.
MS. DOKKEN: Yes.
242
DR. GOODMAN: Dr. Irwin.
DR. IRWIN: Yes.
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: Yes.
DR. GOODMAN: Dr. Robinson.
DR. ROBINSON: Yes.
DR. LESLIE: Yes.
DR. GOODMAN: That was Dr. Leslie.
Gail Griffith.
MS. GRIFFITH: Yes, and I was convinced by
the signal exposed in the TADS data.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Yes.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: Yes.
DR. GOODMAN: Dr. Goodman, yes.
Dr. Rudorfer.
DR. RUDORFER: No.
May I take my 30
seconds, please?
DR. GOODMAN: Yes, please.
DR. RUDORFER: In my opinion, most of the
trials we reviewed were scientifically
flawed.
243
None were designed to address the
question of
suicidality. What they were designed and powered
to address, namely, efficacy, most failed
to do in
the major depressive studies.
I believe that we saw evidence
of many
suicidal-related events, however, to
assign
causality, I think that was not
shown. I think
that, as we have discussed, to show a
differentiation between active drug and
placebo, I
don't believe that the studies were
properly
designed to do so, and we have no other
corroboration that the ascertainment of
events was
equivalent, and the question of switch
into mania
and akathisia, and whether those adverse
events and
complications could, in fact, have resulted
in or
coded as suicidal events, I think remains
a real
possibility, and we simply don't have the
data to
disprove that.
DR. GOODMAN: Jean Bronstein.
MS. BRONSTEIN: Yes.
DR. GOODMAN: Dr. Pine.
DR. PINE: Yes.
244
DR. GOODMAN: Dr. Gibbons.
DR. GIBBONS: Yes with a brief statement.
I think the effects are very small. I think they
are consistent across the studies, but no
more so
than the actual data show in the simplest
of views.
The rate of these events, Outcome No. 3
is about
double in the drug arms relative to the
placebo
arm, and most of the analyses tend to
corroborate
that.
Nevertheless, looking across
these
studies, looking at the TADS studies,
looking at
the naturalistic studies, we see a
preponderance of
evidence in favor of rejecting the null
hypothesis
of no difference.
I would not be totally
surprised, though,
that in further analysis, we might find
some
confounding factor, such as initial
suicidal
ideation that might be biased across
these studies.
Nevertheless, these are randomized
studies, and
randomization is a very important tool,
hard to
ignore.
Thank you.
245
DR. GOODMAN: Dr. Ebert.
DR. EBERT: Yes, with a footnote that we
are looking at the data collectively as a
whole.
DR. GOODMAN: Dr. Grady-Weliky.
DR. GRADY-WELIKY: I also say yes with a
brief statement that yes to the question as
revised
with the appropriate footnotes and
definition of
suicidality as suicidal behavior and/or
ideation,
and I would agree with Dr. Gibbons'
eloquent
comments about the fact that it seems to
be a
minimal risk, but something that we
should agree
to.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: Yes, and I feel that the data
are really quite compelling given the
incredibly
diverse, relatively poor studies, and
that we find
a strong signal arising despite the
inadequacy of
the studies is very compelling to me.
DR. GOODMAN: Thank you.
Dr. Nelson.
DR. NELSON: Yes.
DR. GOODMAN: Dr. Malone.
246
DR. MALONE: Yes, although I would like to
add the caveat that I think if you look
at some of
the data we saw, that, in general, both
drug and
placebo had a decrease in suicidality
over the
course of the trials.
DR. GOODMAN: Dr. Ortiz.
DR. ORTIZ: Yes.
DR. GOODMAN: Dr. Fost.
DR. FOST: Yes.
DR. GOODMAN: Dr. Pfeffer.
DR. PFEFFER: Yes.
DR. GOODMAN: Dr. Fant.
DR. FANT: Yes.
DR. GOODMAN: Anuja is going to tally the
votes.
You don't get to vote, Dr.
Temple.
DR. TEMPLE: I don't want to vote, but I
would like to ask a question.
DR. GOODMAN: Let me give the tally first.
A total of 27 voting. 25 Yes.
1 No. 1
Abstention.
Dr. Temple.
247
DR. TEMPLE: The committee obviously finds
these data quite convincing. I was just curious
about Dr. Rudorfer's reservation.
Do I understand that you think
there may
have been an ascertainment bias, that
certain clues
might make people more inclined to call
this in the
treated group than the other group, is
that the
nature of it?
DR. RUDORFER: That is part of it. In
terms of ascertainment, as I was
mentioning at the
end of this morning, there was no
systematic way of
collecting these data. We have no idea what
questions were asked in which study.
It seems to me plausible that a
placebo-treated patient, who was not
volunteering,
say, somatic or other complaints, might
be
subjected to less interrogation beyond
the rating
scales than someone, for instance, who
came in
complaining of GI side effects or other
SSRI
typical side effects, and I was concerned
about the
blind there.
My other larger reservation is
that I
248
thought we can't have it both ways. Either we
think that these drugs are effective or
they are
not, and if they are effective, then, we
are
looking at a collection of studies which,
for the
most part, are showing a lack of
efficacy, and I
thought that is not the appropriate
context in
which to evaluate the adverse effects,
especially
one which we know is integral to the
illness under
study.
For instance, if we were
looking at, say,
a cardiovascular measure where the
illness date
wouldn't necessarily be relevant, I would
be less
concerned.
DR. TEMPLE: The TADS study, of course,
showed both effectiveness and an
increase. That is
just one study, though.
DR. RUDORFER: I agree with you, on one
hand, yes, it is just one study. The other is that
TADS is specifically designed as an
effectiveness
study, meaning very few exclusion
criteria, with
the aim of following upon, but not
replacing,
efficacy trials, and I am concerned that
we really
249
don't have a collection of good efficacy
trials to
evaluate.
DR. GOODMAN: Because of the overwhelming
affirmative vote to the last question, we
don't get
to skip the next one.
Let me turn to Question No. 3
and read
that.
If the answer to the previous question is
yes, to which of these nine drugs does
this
increased risk of suicidality apply? Please
discuss, for example, whether the
increased risk
applies to all antidepressants, only
certain
classes of antidepressants, or only
certain
antidepressants.
Dr. Katz, do you want to
clarify?
DR. KATZ: Yes, I do.
The other grouping,
which we haven't explicitly described in
this
question, would be what indications, as
well.
DR. GOODMAN: I was going to add that. I
agree that I think that the other
possibilities
would be the sorted or quarantine
indication.
In terms of how to approach
this, this is
250
a little bit more data intensive. In order to come
with an affirmative answer to the last
one, you
only had to be convinced that the
association was
true for one of the drugs. Now, we need to I think
have some reference and I wonder again if
the
handout from Dr. Dubitsky would be
appropriate to
make sure you all have handy as we take a
look at
individual compounds and trials.
Again, I think this is going to
be a
little bit more labor intensive.
Dr. Nelson.
DR. NELSON: It would just be helpful for
me to clarify the intent behind No. 3/4,
because
one way of answering 3, when you get down
to small
numbers in single trials, is to make a
pragmatic
decision that you should then apply the
grouped
data to individual drugs rather than just
a
database decision that, in fact, you have
enough
evidence, because I think we are going to
take a
big group divided up into many small
groups, and
the answer may be no, no, no, no for a
number of
drugs where you would still decide that
you would
251
want to have a class risk assessment.
So, it would be helpful. I guess I am
concerned that we don't get to the real
question,
which is what to do, if we just spend
time on nine
different drugs and three different
indications.
DR. GOODMAN: I think that is a good
point.
I also think there is a statistical
question embedded in it, in that I think
it is
easier to answer in the aggregate,
because that is
where we still have the stronger
significance, but
if I am not mistaken, when you get down
to
individual drugs or individual trials,
although the
numbers may be higher, the relative risks
may be
higher in the drug versus placebo group,
it doesn't
reach the levels of statistical
significance.
So, I would also like to have
some input
from our statisticians on how we should
approach
the individual trials or studies.
Dr. Katz first.
DR. KATZ: I just want to reiterate that
that is exactly what we are asking. We are asking
about the individual drugs. We want to know, the
252
numbers are small, the estimates are
variable, none
of them really, for the most part, are
statistically significant on their own,
but you
have already heard two sponsors with
different
drugs.
One said everybody ought to get the same
label. One said the labels ought to be
drug-specific. So, we anticipated that outcome by
asking the question as we did.
DR. TEMPLE: We are asking for your best
interpretation of the data. We already know each
of the drugs is different, each of them
can't be
considered statistically significant, but
in the
face of that, given the whole data, what
do you
think the best interpretation is.
DR. GOODMAN: I think, generally, when I
hear a class, I am thinking chemical
class rather
than particularly how they are used. There is
certainly a great deal of similarity
among the
SSRIs in terms of they all share high
affinity for
the serotonin transporter.
When you get to the different
253
antidepressants, there is some
variability. Some
have direct interactions with the
serotonin
receptor, some do not, but then some
experts in the
mechanism of action of antidepressants
might argue
it doesn't matter what their acute
receptor binding
profiles look like.
It has to do with what changes
they induce
in the nervous system during chronic
administration, and some would argue that
a
commonality or changes in serotonin
system is
independent of the beginning.
So, I think we could get very
much bogged
down on exactly what we mean by chemical
class, so
perhaps, I think we are going to have to
do it by
individual drug and maybe by indication,
but I
would be open to other suggestions.
Dr. Pine.
DR. PINE: I guess I have a couple
thoughts, two main ones. Looking at the known
effects on brain neurochemistry of all
the
medications that we have before us, one
of them is
definitely a bit of an outlier in that
Wellbutrin,
254
by most accounts, has clearly different
chemical
effects than all the others, and I think
that is
the only strong point I would make in
that regard,
number one.
Number two, I think a number of
people,
both yesterday and today, said the
following, which
I would agree with both from the FDA and
also on
the committee, that I think a lot of
people had a
reasonable sense that fluoxetine was the
one
medication for a lot of reasons that, you
know,
might not have this effect, and yet we
see the data
from the TADS trial that suggests that
might be the
case.
So, to the extent that you are
really
going to force us to say anything
specific about
any medication, at least me personally,
my feeling
was that the only feeling that one might
have had
coming into the meeting was that the
outlier,
besides Wellbutrin, would be fluoxetine,
and I
think at least with respect to
fluoxetine, the data
from the TADS trial, you know, takes that
away at
least from my opinion.
255
DR. GOODMAN: Well, maybe this raises also
a question. We said that we were going to focus on
the clinical trials. Does that mean we should not
include the data from the TADS
study? That's the
Plus 1.
You were right, Tana, we should have been
very explicit. That's the Plus 1. I was
forgetting that that was the Plus 1.
Dr. Fant.
DR. FANT: You spoke to the question in
terms of defining what do we mean by
class and how
to address the drug issues, because, you
know, one
looks at Wellbutrin, but if it was an
SSRI, I might
be inclined to be biased in a direction
of safety
to sort of lump it in with the others,
and look at
it as a class effect, but I am not sure
if I am
willing to sort of roll that in without
any input
from anyone else to tell me that that's
off base
with the effects that we are seeing with
Effexor.
DR. POLLOCK: Right, exactly, and going
the other way, Remeron is clearly not an
SSRI also,
and we have data on that.
DR. GOODMAN: You have to wait until you
256
get
called, because I have got other people waiting
here.
DR. POLLOCK: I am sorry.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: I think we, in approaching
this question, need to be clear. Are we answering
this question as an interpretation of
data issue
where you could simply take out the
slides that
were provided and look at confidence
intervals,
much as what we did as opposed to do we
think
regardless of the data, we should apply a
class
label for warning against suicidality,
however that
is defined, which is really Question 4.
In answering this question, I
think we
just need to be clear that it is an
interpretation
of
data. Even if I said that the data
doesn't
support it for one drug, I may still
support a
class warning. In the interests of efficiency, I
think we just need to run to get to the
real
question, which is what to then do.
DR. FANT: Again, how are you defining
class, are you defining class as
"antidepressant"
257
or chemical class?
DR. NELSON: All of the drugs we have been
talking about. I mean I am not a psychiatrist, so
all of the SSRIs.
DR. FANT: The reason I asked that is
because, like the Chair, I mean when I
think of
class, I think of class based on
mechanism of
action as opposed to therapeutic.
DR. NELSON: Correct.
Simplistically, I
think of class when I go into Hippocrates
or My
Palm, and it says SSRIs and has a name
next to it.
That is how I think of class.
DR. GOODMAN: But there is overlap. The
point I was trying to make is that there
is some
overlap.
Certainly, there are some
differences and
that the SNRIs, like venlafaxine, also
have potent
effects on the norepinephrine system, but
they
share, they overlap, at least at some
dosages, have
high affinity for the serotonin receptor,
or we
don't understand exactly how bupropion
works.
What I was alluding to also is their
acute
258
properties may not be as relevant as what
their
impact is on the adaptation of the
nervous system
during chronic administration, so there
may be some
independence between the initial effects
and the
ultimate final pathway of the effect,
because
obviously, the nervous system is
functionally
coupled.
These are not distinct systems for the
most part.
Dr. Marangell.
DR. MARANGELL: I think all those comments
are quite valid. I imagine that many people group
SSRIs together and will probably want a
class
statement of SSRI Yes/No, antidepressants
Yes/No,
and then whether or not you want to break
out SNRIs
and Remeron and Wellbutrin as others.
DR. GOODMAN: I would be comfortable with
that approach.
Dr. Perrin.
DR. PERRIN: I would encourage that
approach.
It seems to me, looking at the data,
that the ones that raise questions to
us--to me, I
am sorry--are Wellbutrin and the
nefazodone data
259
where there are basically no events.
You might argue that these are
really
different drugs in that context, but my
sense is
the Wellbutrin one, probably simply
because this is
only kids with ADHD, and there are no
kids with
depression in that population, at least
to the
degree we can define it, we can't define
it very
well.
There certainly could have been some kids
with co-existing depression.
The nefazodone, I would like to
have us
understand more about it. That is why I have asked
about it, but my guess is it is also a
population-based finding that has nothing
to do
with the drug, because there were no
events in the
placebo group either.
DR. GOODMAN: Dr. Gibbons.
DR. GIBBONS: I think that really this
ends up being a statistical issue. Dr. Hammad has
shown very clearly that these studies,
even
combined within drug classes, are
insufficient to
have reasonable power of rejecting the
null
hypothesis for even a fairly major
effect. You
260
know, we are out at about a risk ratio of
about 4
to have reasonable power, and so I really
don't
think that we have the data to be able to
make
drug-specific statements, period.
Now, if the committee wants to
make
statements that there is clear
heterogeneity among
the effects across drugs, and even point
to those
drugs that show less of a signal than
others, that
seems totally reasonable to do, but to
use these
limited data for a particular drug to
make an
informed decision about whether or not
this already
small signal has anything to do with one
drug, but
not another drug, I think is reaching
beyond the
available data.
DR. GOODMAN: Dr. Malone.
DR. MALONE: Yes, I agree that we have to
look at all the drugs, and I think if you
look at,
say, the difference between the TADS
study and the
other studies, I think the other studies
were not
set up to look at suicidality very
specifically,
but my impression was that the TADS study
did look
at it more systematically.
261
When it was looked at more
systematically,
you came up with a finding in fluoxetine
that you
didn't have in the less systematic
studies. So,
missing a signal or having a lower signal
might
really just be ascertainment, and I think
for that
reason, you have to look at it as a
class.
DR. GOODMAN: Could somebody remind me, in
the analysis of SSRIs alone in major
depression,
did that reach the level of statistical
significance for showing elevated risk
level?
Could you please come to the
microphone,
Dr. Hammad.
DR. HAMMAD: Yes, it did.
I can get you
the actual number. Yes, the overall risk for
SSRI/MDD, it was 1.66, and the confidence
interval
was 1.02, the lower limit, and the upper
limit is
2.68.
DR. GOODMAN: So, that included
fluoxetine, paroxetine, sertraline. What am I
missing?
It wouldn't be venlafaxine, it's SSRI,
right?
Citalopram, I am sorry, citalopram.
Let me go back to Dr. Gibbons
for a
262
moment.
Given that, assuming we were just voting,
not voting, but we were just commenting
on a class
of SSRIs in major depression, would you
be
comfortable drawing a conclusion based
upon the
data we have?
DR. GIBBONS: I think you can make the
statement within this class, you have
reached
statistical significance, but I don't
think you
have the data to make the statement that
among the
other drugs you don't have statistical
significance. So, that's the rub.
Again, I think in all of this,
you have to
explain as clearly as possible what are
the
limitations of the data, so that you are
not
misinterpreted as saying there isn't an
effect or
there is an effect.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: I was taught 20 years ago
when we were in the tricyclic era that
when you
initiate treatment of depression, there
is an
increased risk of suicidality, and I
think since
the SSRIs don't cause cardiac arrest when
you
263
overdose, everybody forgot that need, and
that is
one big problem.
As many other people have said,
I think we
don't have the data based on these small,
miserable
studies to say that they are safe.
The last thing that I thought
of, we had a
strong argument yesterday for
differential
labeling, and I think companies go to
great lengths
once things are marketed to show an
advantage of
their drug over their competitors, and
there are
always pretty much sham studies that are
set up, so
drug reps go around that can say one is
better than
the other.
I don't want to let the wolf
into the
henhouse by letting any company say that
since my
drug hasn't been shown to cause
suicidality, there
is an advantage to it compared to that
other drug
over there. I think that would be a terrible,
terrible mistake.
DR. GOODMAN: Dr. Fost.
DR. FOST: Just a point of order. I am
not clear whether we are discussing
Question 3 or
264
Question 4, and I want to second Skip
Nelson's
suggestion that we focus on Question 4,
because if
there is agreement on that, then, I don't
think
there would be much value in going
through it drug
by drug, condition by condition, unless
somebody
wants to subtract--
DR. GOODMAN: You may be right. Let's all
take a moment to look at that.
I think the heart of the next
question is
what recommendations we are making. Isn't that
really the thrust of No. 4, is the
regulatory
recommendations.
DR. KATZ: Yes, I think including, more or
less, some specific recommendation. We don't need
exact language, but, in general, what
concepts
ought to be conveyed in labeling, and
then, of
course, any additional regulatory actions
besides
just changing labeling are on the table.
DR. GOODMAN: I still think we need to
answer Question No. 3.
DR. TEMPLE: I think you are having the
right discussion about 3. Three is asking you, in
265
the face of limited data, what is the
best
interpretation of these results. We already know
you don't have enough data on Effexor or
any
individual drug, we knew that, and if
that was the
question, we wouldn't have asked you.
The question is in the face of
these
limitations, what is the best
interpretation, and I
think you are having a good discussion of
that
question.
DR. KATZ: But for our purposes, it is
useful if you are going to say something
like,
well, we believe the findings generalize
to all the
drugs, it would be useful to have some
comment on,
for example, some of the drugs that have
no events.
It
would be useful to consider why you think those
should be included, as well.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: I guess as a summary
position, I certainly don't see any
reason to
question the data that has been put
before us, and
I would probably just follow the
confidence
intervals as a fair neophyte.
266
So, I have to defer those to my
psychiatric colleagues about the other
drugs
without events and how those may or may
not be
included.
That is really an issue that I wouldn't
be able to address, but I think if we are
going to
just follow the confidence intervals,
like most of
us did last time, we should just sort of
say that
and then move on.
DR. GOODMAN: Could I ask Dr. Hammad or
Dr. Laughren, which of the medications
were free of
a signal, just remind us?
DR. LAUGHREN: Do you have my slides from
this morning? Slide 8 shows that there were no
events in the Serzone, the two Serzone
trials.
These were trials in major
depression. There were
no events in the Wellbutrin, the one
Wellbutrin
trial, which was an ADHD trial.
DR. GOODMAN: Dr. Gorman.
DR. GORMAN: As one of the least
sophisticated statisticians around the
table, I
harken back, as someone else did, to
their early
training.
I once asked a statistician what to do
267
with a zero numerator, and they said
whenever you
see a zero numerator, you can always
write a 3 in
there, because mathematically, it works
out that
way.
Don't ask me for the mathematical proof, I am
sure someone here can do it for me.
So, even in the small trials,
when there
is a zero numerator, I think we can do
some
interpretations. I will bring the reference for
the next committee meeting.
DR. GOODMAN: There are special
circumstances surrounding the Serzone
trial that
could explain it besides the drug
itself. Are
there any that could explain that
outcome?
Dr. Malone.
DR. MALONE: I think we have already
talked about these studies not being
designed to
look at suicide, so ascertainment could
have been
different in that study than any other
study, and
lack of ascertainment could be the reason
they have
no events. It is really hard to know.
DR. GOODMAN: And the Wellbutrin study was
in ADD, wasn't it?
268
DR. MALONE: Yes, and I don't think in
ADHD, I am a child psychiatrist, I am not
sure that
suicidality becomes a clinical focus, so
in the
visits, it may not have been asked about
as much,
or even paid attention to as much. I am not
surprised that in the Wellbutrin you
didn't have
any events.
DR. GOODMAN: Dr. O'Fallon.
DR. O'FALLON: I looked in the back of
this book. We didn't see all those
follow-up
slides, but I looked at them last night,
and they
are rather useful. On page 35, the diagram, for
SSRIs, as a class in the MDD trials, and
those are
the four, and you take a look in here, and
it comes
up with the right confidence interval
down at the
bottom.
But you can take a look and see
that the
confidence interval for the whole class
just barely
clears 1, so we are looking at a 0.05
level here.
Actually, the verification using the
other modeling
doesn't quite even--it kind of takes away
from that
a little bit.
269
DR. GIBBONS: I believe the random effect
in this case a little more than the fixed
effects.
DR. O'FALLON: So, that puts the 0.05 up a
bit, like 0.052, or something like that,
but at any
rate, you can take a look at that. It does show
you where your signal is in the SSRI
trials in MDD.
If you look on the next page,
at the top,
there is a similar diagram for I believe
it's the
SSRIs in the other indications, and you
can see the
signal there. That signal fails to be significant
in suicide, and that is on the key
endpoint that
you were talking about, 1, 2, and 6 as
the
endpoint.
Does that help?
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: A couple of points in
response to recent comments. One is what is
different about Serzone. Perhaps it's not
the
methodology. I mean you could hypothesize that
mechanistically, Serzone has a 5HT2
antagonist
which has been at least theoretically
associated
with a decreased early agitation and
early anxiety
realm of side effects, but pragmatically
speaking,
270
the manufacturer has stopped producing
that drug
because of other issues.
So, in terms of the use of our
time, it
might be of academic interest, but I am
not sure it
is going to make a clinical difference to
the
people that we are trying to help.
The other point is that one of
the things
I think the TADS trial very clearly
indicates is if
we had the same discussion prior to that
single,
relatively small, but very helpful study,
we would
have said fluoxetine looks like it
doesn't have a
signal.
So, the point is that one very
small group
of patients can dramatically alter these
numbers
that we are talking about. So, I think to finally
dissect them at the level of whether
there is or is
not a statistically significant signal
with these
very small numbers is likely to lead us
in the
wrong direction.
The public and the FDA want
something
about SSRIs versus all antidepressants,
if you just
look at statistical significance of that,
you could
271
probably pick any four of these drugs at
random and
come up with something similar, I mean
since you
have drugs that have a signal and don't
within that
same class.
DR. GOODMAN: As it has been discussed, in
fact, this led to at least one of the
abstentions,
and also some of the other comments, is
that even
in aggregate, there are limitations in
these data.
When you break it down to the individual
drug, the
numbers get vanishingly small.
It would seem to me, my sense
at this
point, it would be premature to identify
a
particular drug that should be exempted
from this
warning, the reason being, in part, that
if we were
to exempt one, it would conceivably have
the
unintended consequence of steering
traffic in that
direction prior to us having sufficient
knowledge
about the true risk, and we may
inadvertently then
learn that there was a risk there at our
next
meeting.
So, I think given the
statistical
concerns, the small numbers, and my own
clinical
272
impressions, that for the most part, when
I have
seen at least--thank God I haven't seen
suicide--but I have seen suicidal
behavior,
suicidal ideation, I have seen the
activation
syndrome, for the most part, I have seen
it with
most, I am not saying all, but with most
of the
antidepressants, and I have not seen it
limited to
major depression.
I have seen it in the treatment
of
children with OCD, and there is, in fact,
evidence
of that in these trials, that it occurred
in the
OCD patients, as well, with fluvoxamine,
although
the numbers were very small.
So, unless I think there is a
very good
reason for us to do it, I think we are
best off
talking about the class, not on a
chemical basis,
but as antidepressants used in the
pediatric
population.
But you can take shots at that
position
now, but that is where I am leaning.
Dr. Pfeffer.
DR. PFEFFER: I would agree with that, and
273
I would just like to highlight again, on
the blue
pages that we have, two issues that I
would like to
highlight.
First, many of the studies did
not exclude
a family history of bipolar disorder, and
I think
that is an important design issue that we
need to
keep in mind in even considering
comparing, first
of all.
In relation to Serzone, to be specific,
interestingly, they did exclude a family
history,
but they also excluded history of a
suicide
attempt.
So, there may be other issues
besides the
chemistry, as you are saying, but could
be
confounding this. When you put everything
together
as a class, I think that is an
interesting and
important issue, because it may say to
practicing
clinicians, be wary of the SSRIs in
general, but
there may be specific populations, then,
that they
need to identify, for example, family
history.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: Also, even mechanistically,
mirtazapine also has a 5HT2 blocking
effect, and it
274
is clearly in our group, and I am
concerned about
the sloppiness of saying SSRIs, because
practitioners will say, you know, in a
telegraphic
fashion, that, well, does that mean since
I know
that mirtazapine and Effexor are not
SSRIs, that
that might be safer.
So, I just second your idea
that if we are
going to do it, then, I think on the
basis of the
available evidence, I would rather not
see it as,
quotes "SSRIs," unless you are
entirely explicit
about the other couple of drugs, or if
you just say
antidepressants, my preference is for the
class in
that terms rather than trying to make it
mechanistic.
DR. GOODMAN: Dr. Ortiz.
DR. ORTIZ: My comment is that I also
agree that I think we don't have enough
information
to say that particularly the bupropion is
safe and
that we should stick to
antidepressants. I am
wondering if we are not moving into kind
of
research design recommendations, and if
we
shouldn't at this point. It seems like we have
275
talked enough about 3 and 4 to vote on
them.
DR. GOODMAN: Just procedurally, I am not
sure we need to take a vote on this. We haven't
been asked to take a vote on it, but I am
open to
discussion.
Dr. Katz.
DR. KATZ: I think it would be useful to
have a vote. I mean the sentiment, at least the
few people who have expressed one
explicitly, seems
to be that this signal should be
considered to
apply to all of the drugs, for all of the
indications.
But I think it would be very useful for
us to actually get a vote on that
particular
proposal.
DR. GOODMAN: Would you like to pose the
question, Dr. Katz?
DR. KATZ: Well, I think I sort of did.
DR. GOODMAN: We need to hear it again.
See if you can do it again.
DR. KATZ: I will see if I can do it under
pressure now.
276
DR. GOODMAN: We will give you a few
minutes.
DR. KATZ: Should the signal of increased
risk apply to all drugs studied or all
antidepressants including all indications
studied,
words to that effect.
DR. TEMPLE: You actually proposed it. I
don't remember your exact words, but probably
someone does. I think you said something like the
best interpretation of these data is that
it should
be applied to all drugs used for
pediatric
depression and other conditions.
DR. GOODMAN: All antidepressants.
DR. TEMPLE: All antidepressants when used
for all of these conditions, not that we
know that
to be true obviously.
DR. GOODMAN: Psychiatric conditions. We
have heard I think some examples from the
open
public forum where it was used for
non-psychiatric.
It may be when used in the pediatric
population for
all indications, and, of course, there
are very few
indications.
277
DR. TEMPLE: All the studies were for
indications pretty much that the drugs
have.
DR. GOODMAN: Okay.
So, we will limit it
to the indications that are under study,
all the
indications, psychiatric indications.
Would somebody put that
question together
for me?
In the meantime, Dr. Marangell,
as we try
to draft it.
DR. MARANGELL: I was going to try and
draft it for you.
DR. GOODMAN: Please.
DR. MARANGELL: I move that we vote that
the committee's opinion is that the
increased
suicidality, as previously defined,
pertains to the
use of the nine antidepressants listed
for all
indications studied to date.
DR. GOODMAN: I like that.
DR. McGOUGH: Can I ask a question? I
don't want to lose sight of other drugs
approved
for depression. There are tricyclic
antidepressants, there are MAOIs, and I
think part
278
of the decision is do we include all
those, as
well, and is this a general
recommendation for any
drug that is indicated for depression.
DR. PINE: Can I make a comment, too,
about both of those comments?
DR. GOODMAN: Dr. Pine, go ahead.
DR. PINE: I would feel more comfortable,
and again maybe nobody agrees with this,
but I
would be interested in your thoughts, if
you made
the statement more of a negative, since I
think it
more accurately reflects the data.
In other words, none of the
agents should
be excluded from this warning, because I
feel more
comfortable and can confidently make that
statement, whereas, when you make the
statement
that it applies to all, you know,
particularly
agents where there is no event, I am kind
of left--
DR. GOODMAN: I think that is the
corollary, but I think it would be hard
to
translate the corollary into practice.
DR. PINE: The first statement was
something about a warning that we just voted
on
279
already, Question No. 2, and then the
second one
was no agent should be excluded from this
warning--
DR. GOODMAN: Let me return to Dr.
McGough's comment for a moment in terms
of whether
we should be expanding our considerations
to
tricyclics and MAOIs. I don't think we can because
if we look at the history of this process
today, we
are focusing on the clinical trials,
although I
would agree with you that based upon
clinical
experience, one would suspect similar
kinds of
problems with tricyclics.
In fact, we saw that in one of
the studies
based upon the British sample showed no
significant
difference in relative risk between
dothiepin,
which is a tricyclic.
DR. McGOUGH: I think there are actually
other reasons in addition not to use
those other
classes, and I don't even think they are
used very
commonly.
DR. GOODMAN: Because of cardiovascular
concerns, yes. I hear your point from a clinical
standpoint, but I think based upon the
data under
280
consideration, I would agree with Dr.
Marangell's
rendering of the question.
Other comments? Dr. Newman.
DR. NEWMAN: I like the phrasing except
that I wouldn't restrict it to when the
drugs are
used for the indications for which they
were
studied, because we heard of one girl who
got one
of these drugs for migraines, and I would
just say
when given to pediatric patients, and not
restrict
it to the indication studies, because,
you know,
also, people are getting it for sleep.
So, I would just make it very
broad, when
given to children, they can increase
suicidality.
DR. GOODMAN: I have to agree with that.
Dr. Gorman.
DR. GORMAN: Agree.
DR. GOODMAN: Dr. Gorman, you agree also?
DR. GORMAN: Agree.
DR. GOODMAN: Tom.
DR. LAUGHREN: Just a thought. Clearly,
when you are moving from Questions 1
through 2
through 3, going from 1 to 2, clearly the
focus is
281
on the 24 trials that we looked at. I think as you
move towards 3 and 4, I personally don't
see any
problem.
I mean if you have reached a
conclusion
that you can expand this claim to the
antidepressant class, in other words, you
are
willing to ignore findings of no events
for certain
trials, I don't think it is so
unreasonable to
consider expanding it to the whole class,
and here
is my reasoning for that.
I think there is a great risk
in steering
clinicians back to using the tricyclics
as an
alternative to a safe group of drugs,
which all of
us know are not, so it is just something
to think
about.
DR. GOODMAN: Dr. Marangell, could you
restate that question now including all
antidepressants in the pediatric population,
could
you try it?
DR. MARANGELL: I can try.
I move that
the committee adopt the position that
antidepressant agents, when given to
pediatric
282
patients, defined 7 to 17 years old,
increases the
risk of suicidality as previously--no?
DR. GOODMAN: Let her finish and we will
get back to the age range.
DR. MARANGELL: I move that the committee
consensus is that the risk of
suicidality, as
previously defined, applies to all
antidepressants
when used in pediatric patients.
DR. GOODMAN: I like that.
Was there a
desire to not qualify what we mean by
pediatric, or
to qualify differently?
Dr. Leslie.
DR. LESLIE: I just feel that 7 to 17 is
not a good direction to go in.
DR. GOODMAN: So, it is sufficient to say
pediatric?
DR. LESLIE: And I just wanted to add the
other reason I would say that this is
important to
say broadly is we have got Cimbalta and
other
things coming out, and you don't want
someone
saying, well, Cimbalta doesn't have this
warning,
so you ought to use it instead of Luvox,
et cetera.
283
DR. GOODMAN: Did anybody transcribe that?
I am comfortable with the statement. They are on
it.
We are about to project it.
Dr. Katz.
DR. KATZ: I would just like to hear a
little bit more discussion about applying
the
warning, whatever it is that we apply, at
least
applying the result to non-psychiatric
indications.
We don't have any trial data in
that
population. We have reports of individual
cases,
and clearly they are used for other
things, but I
would just like a little more discussion
or hear
what people think about extending it to
all
possible indications for which these
drugs might be
used.
DR. GOODMAN: Once Tom gave us some
freedom to not confine ourselves to the
clinical
trials, I think led us to consideration
of all
antidepressants and all possible
indications, but,
sure.
Dr. Nelson.
DR. NELSON: In looking, for example, at
284
the current labeling, I think the
restriction to
major depressive disorder is potentially
falsely
reassuring, and it would concern me if it
was
listed only for psychiatric conditions,
that the
same thing would happen with the
off-label use in
non-psychiatric conditions.
Even though there is no data
suggesting
that, by having a warning associated with
the drug,
and not with the condition, the way a
clinician
could possibly read this would be here, I
am giving
you this drug, but since you are not
depressed, it
is not going to happen in you, so
therefore, it is
safe, and we can't say that.
That is the way it would be
read, so I
think by not listing it to the drug, you
open up
that possible interpretation to a
clinician, which,
in the absence of evidence, I think would
be a
danger.
DR. GOODMAN: I agree completely, and I
think, although we haven't discussed this
at great
length, and I don't know how many people
would
agree with this statement, but I think at
least I
285
do,
and I have heard some other mention the fact
that our hypothesis of the mechanism here
is some
sort of behavior toxicity that may be
compounded by
an interaction with an underlying
proclivity, such
as bipolar diathesis.
It may have to do something
about
metabolism or drug levels. There are a number of
other factors that can contribute, but
once I saw
the data in the OCD trials, although it
is only a
few cases, I began to think, and also
based on my
own experience, that this isn't strictly
worsening
of depression or ineffectiveness in
treating
depression, especially since in a number
of the
cases, it seems to happen so early in the
course.
So, I would agree completely that I
think,
in part, our recommendations reflect a
working
hypothesis that what we are seeing,
although a rare
event, may represent behavioral toxicity
that can
occur in individuals other than those
already
diagnosed with depression.
We have the revised question up
on the
screen--no, we don't.
286
DR. TEMPLE: That is my revision, it is
not exactly the same as others, and you
don't have
to take it.
DR. GOODMAN: We are going to have to
change it.
Dr. Marangell, what do you
think?
DR. MARANGELL: If you say the best
interpretation of the results of the 23
plus 1,
then, it would be the indication
studied. If you
say what is our, you know, kind of
interpretation
of where we go with those results, then,
it is a
little bit broader.
DR. GOODMAN: I would like to go with
broader.
I don't know if we can change it on
there.
Other comments? Dr. Chesney.
DR. CHESNEY: When you introduced applying
this principle to all antidepressants,
this is a
whole new ballpark for me, because I
don't know
anything about them, and we don't have
any data,
and maybe I misunderstood, but if I
didn't
misunderstand, could somebody explain to
me why we
287
should extend whatever we decide about
what we have
heard about, to things that we have heard
nothing
about?
DR. GOODMAN: What is it that we haven't
heard about?
DR. CHESNEY: All the other
antidepressants. What I heard was that we extend
this, not just to SSRIs, that we know
about, but to
all other antidepressants, and I don't
know
anything about them.
DR. GOODMAN: We have covered most of the
field, but I would let others--
DR. MARANGELL: There are two areas of
extension in regard to the revised
Question 3.
What I was actually just referring to was
the
extension to pediatric use or any use in
pediatric
patients as opposed to just the uses that
were
studied, and the rationale for that
portion is, you
know, clearly it is beyond major
depression for
those of us that think that there is a
consistent
signal, you see that also in some of the
non-major
depression indications, such as the OCD
trials.
288
So, that is the reason to
extend that, and
then the feedback we got, that I heard
from the
rest of the committee was that even
beyond those
trials, there may be other indications,
and we
don't want to try and give the signal
that it is
limited to, you know, if a doc wants to
use an
agent for a pain condition, that we
wouldn't expect
to see it there.
In terms of other
antidepressants, the
tricyclics and the MAOIs are older
agents, and my
understanding is that they have never
been studied
in pediatric patients, so we have no
data, is that
correct?
DR. TEMPLE: It is not a bad idea to take
those questions in sequence. First, think about
the drugs that were studied and what is
the best
interpretation of them, and then, you
know, we
might approve a new antidepressant, and
is it going
to be the only one that doesn't bear that
label?
Do you like that idea? We will get to that.
DR. LAUGHREN: Actually, a clarification.
Some of the older drugs have, in fact,
been
289
studied, but FDA has not seen the data,
they have
never been submitted. There are at least 12 trials
in tricyclic antidepressants in pediatric
depression that I am aware of, but I
don't know how
well those patients were ascertained or
suicidality, I know nothing about the
safety in
those trials.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Again, I think when you
treat depression, there is an increased
risk of
suicide.
Most of this is off-label, so to restrict
it to indications is kind of an illogical
event,
that somebody would get Zoloft for
insomnia is
beyond anything I can understand.
So, I think really the purpose
of this, I
think is to really put physicians on
notice that
this group of medicines can cause these
problems
for whatever they think of. To be safe, I think we
are really putting the physicians, you
know, the
real attempt is to inform them that they
need to be
concerned, they need to monitor for
whatever they
are using this for.
290
DR. GOODMAN: Dr. Robinson.
DR. ROBINSON: One of the things that I
took away from a lot of the public
testimony
yesterday was how much the people said they
wanted
to have known things before they got into
a
treatment.
I think one of the things that
we have to
deal with is that we do not know a lot
about some
of the other drugs, like the tricyclics,
the MAOIs,
we just don't have the information
because they
were done so long ago.
Now, I personally think that it
would be a
great tragedy if clinicians went from
using SSRIs
to tricyclics, which have a much lower
overdose.
You can kill yourself taking much, much
fewer
pills.
But I think we also have to be
humble
enough to say, you know, there are
certain things
we don't know. We don't know about the risks for
tricyclics, we don't know about the risks
of SSRIs
used for these off-label non-psychiatric
indications. We just don't know, and there is no
291
information.
In some ways, that is the most
accurate
thing to tell a prospective family
thinking about
these drugs, is we know for certain
indications, it
has an increased risk of suicide. For this stuff,
we
don't know, it might be a lot worse, it might be
better, we just don't know, but take this
into
consideration.
DR. GOODMAN: Before I get to you, Dr.
Temple, I actually don't think it is such
a bad
question.
I think that by answering this question,
it allows us to put Question 3 behind us,
and then
I think a lot of the discussion that we
are having
is then what should we recommend in terms
of
further regulatory action, and I think
that is
really getting it to Question 4.
Would that be a reasonable way
of sorting
out where we are right now, to try to
maybe answer
the one that is up there, and then we can
talk
about whether, in our recommendations in
terms of
further warnings, that maybe that issue
should be
expanded further, but this would be a
good
292
transitional question, as I see it.
Dr. Temple.
DR. TEMPLE: There really are two parts.
The first part in some ways is I think
what most
people have given their answer to
that. The second
part I just was writing quickly referred
to
tricyclics, but it is worth thinking a
little bit
here about whether the best
interpretation is that
it applies to some study, some new drug
like we
just approved one that hasn't been tested
yet.
We are going to surely have to
come to
grips with that question, too, so it says
tricyclics, it could have said MAO
inhibitors, it
could have said duloxetine.
That is the second question,
but I think
that follows the first.
DR. GOODMAN: I would like to take off
after the second bullet for a
moment. Unless there
is further discussion, I would actually
like to
vote on that question that is up there.
Dr. O'Fallon.
DR. O'FALLON: Again, on page 34 of the
293
thing we got yesterday, there is a nice
diagram
that shows the relative risks and their
confidence
intervals for all of the nine drugs, all
of the
indications, and what you will see, when
you look
at it, is that every drug has at least
one trial
that shows an increased drug.
You can make the argument that
there is
some evidence for every single one of
these.
DR. POLLOCK: If we are saying the nine
drugs, it includes Wellbutrin, which
isn't one of
these.
DR. O'FALLON: Perhaps, but what I wanted
to point is that every single one of
these drugs
has at least one, some more, that show an
increased--okay, eight, whatever--it says
all
drugs.
DR. GOODMAN: Unless there is further
discussion, I would like to put this to a
vote.
The reason, why do I want to answer this,
because
it is our job to try to answer the
questions that
were presented before us.
I think that if we don't answer
this, it
294
is not clear from our last vote whether
we were
thinking of just one drug or many
drugs. So, this
is the natural sequence that we are
making it clear
by this that we are talking about in
aggregate when
we look at the data. We are not exempting any of
the drugs for any of these pediatric
indications.
So, I think we need to answer
this
question, and it should be put to a vote.
Yes.
DR. FANT: Just another way of phrasing
that which may be more palatable. If things are
just transposed a bit, to say is the best
interpretation of the results of the 23
plus 1
trials, that none of the drugs examined
can be
excluded from the increased suicidality
risks that
has been shown da-da-da.
DR. GOODMAN: Let me ask a statistician
and then a wordsmith. Any statistician want to
weigh in on that?
DR. GIBBONS: I don't think you want to
draw an inference beyond the data that
you have.
DR. GOODMAN: So, are you supporting the
295
way it is currently phrased or suggesting
it be
different?
DR. GIBBONS: I am supporting the last
statement.
DR. FANT: Basically, what it says is that
the data--it is more difficult to say the
data
applies to all nine, and for me, it is
easier to
say that based on the data we can't
exclude any of
the drugs.
DR. GIBBONS: The non-exclusion, yes.
DR. GOODMAN: I would find that more
palatable, too, I would agree.
Does somebody want to try that?
DR. NEWMAN: I will take a stab.
DR. GOODMAN: Okay, we are working on it.
In the meantime, we will entertain other
comments.
Dr. Newman.
DR. NEWMAN: I guess I will have to see
it, but I am concerned that that does
sound quite a
bit weaker to say that we can't tell for
sure that
this drug doesn't cause suicide or
suicidality. It
is true, we need to apply this warning to
the whole
296
class, but there is sort of a double
negative
there, and I think it would be clearer to
say the
warning applies to the whole class.
DR. GOODMAN: What I was suggesting before
is that this isn't the warning per
se. I think we
can still construct the warning. I think it would
be more along the lines of what Dr.
Marangell had
drafted earlier. This is just to answer the
specific question to indicate that we are
not
talking about just one drug and then we
can get
beyond Question 3.
Lauren, do you have something?
DR. MARANGELL: The data in aggregate
indicate an increased risk of
suicidality.
Although there is variability in the
results, we
are unable to conclude that any single
agent is
free from risk at this time.
DR. GOODMAN: That's good.
Do you want to
do that one more time? You may get the Chair of
this committee soon, you know that.
DR. MARANGELL: No, thanks.
Okay. Data in aggregate indicate an
297
increased risk of suicidality as
previously
defined.
Although there is variability in the
results, we are unable to conclude that
any single
agent is free from risk at this time.
DR. GOODMAN: Give it a chance to be keyed
in.
DR. TEMPLE:
From our point of view, any
of those are fine, because they point
directly to
what the next question is going to
address, so it's
okay.
DR. LAUGHREN: As long as it includes a
mention--it would be better to see it in
writing,
but I didn't hear mention of pediatric
patients in
all indications.
DR. GOODMAN: We are working on it over
here.
Tana.
DR. GRADY-WELIKY: Along those lines, I
wanted a point of clarification about are
we
talking pediatric use indications or are
we talking
pediatric use?
DR. GOODMAN: We are talking about the
298
studies.
We are back to talking about the studies.
In a sense, this is the second part of
the previous
vote, and what we are indicating here is
that are
affirmative as already voted by the
majority of the
committee, indicates concern about all
the drugs in
aggregate or at least that we can't
exempt any one
of them individually. Otherwise, as left, the vote
could look like we were just concerned
about one of
the drugs.
DR. MURPHY:
You could just say the data
in pediatric patients.
DR. GOODMAN: Dr. Irwin.
DR. IRWIN: I just wanted to be certain in
terms of the definition of pediatrics,
what do we
include with that, because it can
vary. Does FDA
have a definition of that?
DR. MURPHY: Yes, we have a definition
that allows you to be very flexible
depending on
the state and country from which your
data is
derived.
Again, later, when we get to the warning,
we can be more specific, but I think
right now the
phrase "pediatric data" would
be sufficient.
299
DR. GOODMAN: Isn't the NIH definition up
to 21?
DR. PINE: It matters what it is being
applied for, less than 18 for some
definitions, and
less than 21 for others.
DR. MURPHY: Ours is not up to 21.
DR. GOODMAN: Yours is not up to 21?
DR. MURPHY: It is up to 18 in some
guidances.
DR. GOODMAN: In these particular studies,
were they all up to, but not exceeding,
age 18?
DR. MURPHY: Yes, they were. Most of
these studies included 17.
DR. GOODMAN: They included 17, but not
18?
DR. MURPHY: Is there an 18 in one of
them?
DR. GOODMAN: I am sorry, I can't hear.
DR. MURPHY:
I think they say to 18. That
is where you get into argument.
DR. PERRIN: There were a couple of
studies where a couple kids got in over
age 18 by
300
mistake.
DR. HAMMAD: May I say something?
DR. GOODMAN: Yes, please.
DR. HAMMAD: I think I had 85 patients
that were 18 years old out of 4,000, but
I did have
it up to 18.
DR. GOODMAN: Up to and including 18?
DR. HAMMAD: Exactly, including 18.
DR. IRWIN: The reason I asked that is
because much of testimony we heard from
the public,
a lot of that was in young adults that
were beyond
their 18th birthday.
DR. GOODMAN: Again, that is for our next
statement.
Ms. Griffith.
MS. GRIFFITH: I agree.
I think that is
problematic in that it varies from state
to state.
There are legal definitions of how long a
parent
can have control over a child in terms of
what that
child will not have to agree to by way of
intervention.
So, I would even recommend we
go up to 21
301
because, as of 18, in most of the states
in the
U.S., children no longer have to comply
with
pharmaceutical interventions, and I think
a lot of
people would dismiss the advice once a
child turns
18, and it is not warranted.
DR. GOODMAN: Any further wordsmithing of
the question? I am satisfied with it.
Dr. Newman.
DR. NEWMAN: I just think this phrasing is
quite a bit weaker than it was before
because when
you say you can't conclude that an agent
is free of
risk, you can never ever conclude that
any agent is
free of risk, so this just doesn't say
very much.
I would rather state it more
affirmatively. Although there is variability in
the results, we believe these results
apply to all
antidepressants in this class.
DR. GOODMAN: Before you change it, we
need to have some other input on that.
DR. ORTIZ: This is not the warning. This
is what we are going to vote on, and it
seems like
there is a lot of consensus that this is
what we
302
can vote on.
DR. GOODMAN: Right.
Dr. Fant.
DR. FANT: If we put the comment in there
"within this class," I am just
concerned, you know,
it is going to restrict it to say SSRIs,
and the
whole point of this is to include, you
know, to be
cognizant of potential risks in drugs
that really,
as poor as the data is with other drugs,
there is
even less data.
So, the increased risk, we can
be as
strong as we want in affirming that and
emphasizing
that, but I agree with the whole concept
that no
company can enroll 70 kids and say we
didn't see
anything, therefore, you guys ought to
use us
instead of the other guy. I think we should not
facilitate that.
DR. GOODMAN: Dr. Katz.
DR. KATZ: A couple of things. First of
all, I think you have to say something
about what
kind of agent we are talking about. I think if you
said any single antidepressant agent, we
would know
303
what you mean, which brings me to my
second point,
which is this is not language for
labeling or
anything else, as someone said. This is to guide
us, to give us a sense of what you
believe about
which sorts of classes and indications
the risk
applies to.
I believe it is fair to say
that if you
vote on this question, and you add the
word
"antidepressant agent," we will
know what you mean.
So, I don't know that we need
much more
extensive discussion on fine-tuning the
question.
We know what you are getting at, I
believe, and if
you vote on this with just the addition
of the word
"any single antidepressant
agent," I think that
would be perfectly fine for our purposes.
DR. GOODMAN: That is the change I would
recommend, if we could just punch in that
"any
single antidepressant agent."
DR. MURPHY: Dr. Goodman, when you go
around and each person votes again that
30-second
statement, they can make it clear if they
have a
problem with the statement.
304
DR. GOODMAN: That is correct, and we are
talking about the antidepressants that
were in the
trials.
DR. TEMPLE: That's correct. I thought
that is what you were referring to.
DR. GOODMAN: That is what we were
referring to.
DR. TEMPLE: So, we will have a second
question either now or in the next one,
it doesn't
really matter about what to do with the
drugs that
weren't in the studies.
DR. GOODMAN: Right.
That is going to be the last
comment
before the vote.
Dr. Perrin.
DR. PERRIN:
I am just wondering whether a
slight variation on that issue of risk
could be,
and I can't quite have it in front of me
now, that
we are unable to conclude that any single
antidepressant agent has particularly low
risk of
suicidality at this time. It might be a more
accurate statement of where we are.
305
DR. GOODMAN: Is free of increased risk
maybe.
It is free of increased risk.
DR. TEMPLE: Fine.
That is what that
means.
When say "free of risk," it means free of
increased risk, otherwise, it has no
meaning.
DR. GOODMAN: That's it.
We are going to
go for a vote, and if you have further
comments
including about the wording of the
question, you
can state them in the 30 seconds that I
am going to
allow to be included.
Let's start at the opposite end
of the
table this time, first, with Dr. Fant,
could you
indicate Yes/No.
We did not add increase because
Dr. Temple
said it was implied.
DR. FANT: Yes.
No additional comments.
DR. PFEFFER: Yes.
No other comments.
DR. FOST: Yes.
DR. ORTIZ: Yes.
DR. MALONE: Yes.
DR. NELSON: Yes.
DR. PERRIN: Yes.
306
DR. GRADY-WELIKY: Yes.
DR. GOODMAN: Wait, slow down. Let me do
the name first. I think we are eager to cast a
vote.
We have Fant Yes, Pfeffer Yes,
Fost Yes,
Ortiz Yes, Malone Yes, Nelson Yes, Perrin
Yes,
Grady-Weliky Yes.
Ebert.
DR. EBERT: Yes.
DR. GOODMAN: Gibbons.
DR. GIBBONS: Yes.
DR. GOODMAN: Pine.
DR. PINE: Yes.
DR. GOODMAN: Bronstein.
MS. BRONSTEIN: Yes.
DR. GOODMAN: Rudorfer.
DR. RUDORFER: Yes with a comment. First
of all, I wonder if--I guess it's too
late to go
back, but--
DR. GOODMAN: You guessed right.
DR. RUDORFER: --if a clarification of the
phrase "increased risk" would
be helpful. Again, I
307
think we have agreed that an increased
risk is
likely to be small, and I wonder how that
should be
conveyed, because "increased"
covers a fairly wide
range.
The other thing, if I have a
few seconds
left, just to reiterate my concerns. I agree
certainly with the spirit of this
statement, that
we have seen that signal across all the
drugs.
My concern relates, if I may
use an
example, to the two citalopram studies we
reviewed.
An American study found efficacy in major
depression in a pediatric sample, and
found no
suicidality signal.
The European study combined
data from
seven different countries, which I did
not find
methodologically attractive, found no
efficacy
compared to placebo, and did find a
positive
suicidality signal.
S-citalopram, we have no data
on the
related compound. So, again, my overarching
concern remains the fact that I think this
is very
much still a work-in-progress.
308
Thank you.
DR. GOODMAN: Thank you.
Dr. Goodman, Yes.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: Yes with the understanding
that this statement applies only to the
SSRI agents
that we have been discussing. It doesn't say SSRI
anywhere.
DR. GOODMAN: Let me clarify. It applies
to all the compounds that were studied in
the
trials, which includes several
non-SSRIs. When you
add the non-SSRIs, the hazard ratio gets
bigger,
for what that is worth.
DR. CHESNEY: In other words, we are
including imipramine and--
DR. GOODMAN: No, no, just the ones that
were involved in the clinical trials that
we
reviewed, that were part of Hammad
re-analysis.
DR. CHESNEY: Which were the non-SSRIs?
DR. GOODMAN: Venlafaxine.
DR. CHESNEY: All right.
The answer is
Yes.
309
DR. GOODMAN: I am sorry.
Let me re-ask
your vote, Dr. Chesney, based upon that
clarification.
DR. CHESNEY: Yes.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Yes.
DR. GOODMAN: Griffith.
MS. GRIFFITH: Yes.
DR. GOODMAN: Leslie.
DR. LESLIE: Yes.
DR. GOODMAN: Robinson.
DR. ROBINSON: Yes.
DR. GOODMAN: Marangell.
DR. MARANGELL: Yes.
DR. GOODMAN: Irwin.
DR. IRWIN: Yes.
DR. GOODMAN: Dokken.
MS. DOKKEN: Yes.
DR. GOODMAN: Newman.
DR. NEWMAN: Yes.
DR. GOODMAN: Wells.
DR. WELLS: Yes.
310
DR. GOODMAN: Pollock.
DR. POLLOCK: Yes.
DR. GOODMAN: O'Fallon.
DR. O'FALLON: Yes.
DR. GOODMAN: Santana.
DR. SANTANA: Yes.
DR. GOODMAN: It was unanimous this time.
We had 27 respondents, all Yes.
Do people want a short
break? Yes.
[Break.]
DR. GOODMAN: I think we have made a great
deal of progress. We have two remaining questions.
As currently constructed,
neither of those
questions require a vote.
Dr. Katz.
DR. KATZ: Yes, it is very important for
us to have you vote on an extension of
the question
you just voted on, which is whether or
not this
should apply to all other antidepressants
or
whether you simply want to limit whatever
warning
or whatever conclusion we draw to just
the ones
that were studied.
311
My understanding is that in
this question,
the one you voted on, you limited it to
consideration of the drugs studied.
DR. GOODMAN: That is correct. Let's have
a discussion and see if others around the
table
agree.
Dr. Gorman.
DR. GORMAN: For future drugs that are
coming down the pike, the Food and Drug
Administration, under the Pediatric
Research Equity
Act, has the ability to demand
antidepressant
studies in children prior to their
release.
I don't think there can be any
doubt after
the numbers we heard today that they will
be used
in more than 50,000 patients and have the
potential
to give a significant therapeutic
advance, because
at this point, we only have one drug that
is
approved.
So, I think for drugs coming down the
pike, I think there is the ability within
the FDA
to ask for that information, and since I
am not a
voting member of the committee, I will
leave the
312
discussion about what to do with the
previously
approved drugs alone.
DR. GOODMAN: Dr. Wang.
DR. WANG: Yes.
It seems if you exempt
any drugs, new or otherwise, you set up
this
perverse incentive, particularly for the
new drugs,
to either do no studies or to do poorly
conducted
studies where they don't ascertain cases
or
underpower them, so I think to prevent
that
perverse incentive, you have to put the
onus on
them to show that they are the exception.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: While I might want to have a
similar strategy across all
antidepressants, I
think it is really not appropriate for
this
committee to take a stand against
antidepressants
for which we have not reviewed the data.
I am very uncomfortable saying
that we
know much about them when we really
haven't seen
the data on them.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: Although agreeing with the
313
prior point, my concern would be the
message that
would be sent if you didn't apply this
across all
drugs, and my own preference would be to
have a
class risk warning and then any
preferential
treatment ought to be on the efficacy
side, so that
you then have drug-specific labeling
under the
efficacy component, which would then begin to
differentiate, so that individuals can be
informed
about the risk-benefit ratio by looking
and
comparing those two sections, which would
be one
way to direct people appropriately as
opposed to
inappropriately.
DR. GOODMAN: Dr. McGough.
DR. McGOUGH: Just again, what we are
talking about here is patient safety, and
I think
it is appropriate that we err on the side
of being
in
favor of that, and even though we haven't
reviewed data specifically, I think it is
an
unanswered question, and as such, I think
it is
appropriate to apply it generally to the
class of
antidepressant drugs.
DR. GOODMAN: Dr. Laughren.
314
DR. LAUGHREN: Just to clarify what we are
planning to do with the general warning
that we
have already implemented for 10 newer
generation
antidepressants, we are planning on
extending this.
In fact, it has already been extended to
some of
the older drugs, some of the tricyclics.
Our plan is to extend it to
all, and the
question here is whether or not we should
also, if
we are thinking about adding new language
to that
warning, suggesting that we have now
established
causality, whether that new language
should also
apply to all antidepressants.
Again, I think this concern has been
expressed by several members, that if you
don't do
that, you are, in effect, directing
clinicians to
use those older drugs.
DR. GOODMAN: Dr. Leslie.
DR. LESLIE: Again, my concern is not just
the older drugs, but the newer drugs,
because
Cimbalta, which is coming out, is most
comparable
to Effexor, which had the highest
relative risk,
and I again would be very concerned with
the
315
marketing directly to patients and the
heavy
marketing to clinicians, that it would be
marketed
as the only drug of this class without a
label, and
would thus again push clinicians in that
direction.
DR. GOODMAN: Dr. Marangell, did you have
a draft of the question that we were
composing
before, that represented more of a
general warning?
I don't think we keyed it in. I don't think it was
saved.
I think where we are in the
discussion,
let me remind people, we are in Question
4, and we
are talking about recommendations
regarding
additional regulatory actions.
Since the last meeting,
warnings were
issued about a group of symptoms that may
be part
of what some have labeled inactivation
syndrome,
that were proven to be precursors of
suicidality.
So, I think, in part, the
question before
us is whether we want to extend that now
to
conclude that there is a suicidality
risk. In the
last warning that was issued, it said
that there
was no established connection between the
316
medications and suicidality, and we have
obviously
been deliberating and voting on that
question.
We are really talking about
what
additional warnings need to be posed that
go beyond
the
activation symptoms or syndrome that was
defined previously.
Dr. Temple.
DR. TEMPLE: Whether you do it as part of
Question 3 or part of Question 4, we
unequivocally,
as you have already indicated, need to
know whether
the warning, if it is modified, needs to
be in the
labeling for all antidepressants or just
the ones
that were in the study including
tricyclics, MAO
inhibitors, duloxetine, and so on.
So, I don't know whether that is a 3
question or a 4 question, but once you
answer the
question about any additional warning
language, we
have to know who you think that applies
to.
DR. GOODMAN: Dr. Malone.
DR. MALONE: I think it applies to all of
the drugs. Was it the Jick study that really
didn't find any difference between the
risk for
317
different classes of drugs. I think that
is one
reason to apply it to, say, the
tricyclics which
were included in that study.
Also, some of the older drugs,
like the
tricyclics and MAO inhibitors, are much
more
dangerous, so if you did become suicidal,
you would
actually have the drug with you, that you
could use
to commit suicide easily.
I agree that new drugs, as they
come on
the market, you wouldn't want to
automatically give
them this undue edge that they don't have
this
warning.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: I would just like to say
that when I made my comment before the
break, I
wasn't thinking of all these other factors,
and on
reconsideration, I think that these are
excellent
points.
I think that the wording was
correct that
it is well recognized that suicide and
suicidal
behavior emerges during the early stages
after
treatment, and because we don't have the
specific
318
studies that address this issue, it may
be
reasonable to assume that this would
apply to all
antidepressants at this point in time
until proven
otherwise.
Somebody made that point, put
the onus on
the company to show that they did not
fall in that
ballpark.
So, whereas before the break, I was very
alarmed that we were going to be asked to
do some
things we knew nothing about, I think I
now
understand the reasoning.
Thank you.
DR. GOODMAN: Thank you.
Dr. Pine.
DR. PINE: I think it is important to
recognize, speaking again as a child
psychiatrist,
that there is a very legitimate concern
about
discouraging people, and physicians in
particular,
from moving away from the 23 plus 1, the
agents
that we have been discussing, to
tricyclics
antidepressants.
I think that, at least from my
own
perspective, I think we want to think
kind of
319
ahead, and I think we do obviously based
on what
the FDA said, and based on other
information, say
something about the use of those agents.
Historically, there actually is
a fair
amount of data on those agents, although
not nearly
the amount of data as we have reviewed
for SSRIs,
and it is current standard of care in
child
psychiatry not to use those agents, and
that is
really based on two things.
That is based on, number one,
the fact
that a number of meta-analyses have shown
that the
agents are not effective over placebo,
and there
has not been a single study that
demonstrated
efficacy for a tricyclic antidepressant
or an MAOI,
number one.
Number two, there was a lot of
concern in
the 1990s about the cardiotoxicity of
these agents
in children, not only the cardiotoxicity
in
overdose, which I think there is little
debate
about, but even questions about
cardiotoxicity when
the agents were used appropriately in
therapeutic
doses.
320
So, I think, on the one hand,
it is very
important to say that it would not be
good if
physicians were to move from the newer agents
to
the older agents, on the one hand, on the
other
hand, probably the strongest thing we
could say
would not be to say, well, we don't know
whether
these drugs cause suicidality or not, the
strongest
thing we could say is that there are
plenty of
reasons to discourage this.
One of the might be that the
agents are
associated with suicidality like the
SSRIs,
however, the cardiotoxicity and the lack
of
efficacy data, I think are stronger
reasons not to
move that way.
DR. GOODMAN: Dr. Gibbons, did you have
another question or comment?
DR. GIBBONS: This is a very tricky issue.
The issue is we don't want to go beyond
the data
that we have, but on the other hand, with
the
exception of one of these agents, we
haven't shown
any adverse effects on a drug-by-drug
basis.
Now, a new drug comes out on the
market.
321
Given current regulatory practices, there
will not
be enough data to show a risk ratio of
1.5 in that
drug, so the conclusion will be that
there is no
association, and they may get an exemption.
On the other hand, you know, so
what you
are doing is you are holding a much
higher standard
to the drugs that were looked at in these
21
studies, for which we were able to pool
over drugs
and show an effect.
I suppose you could set up a
situation in
which a new drug or an old drug that was
not part
of the 21 could, in fact, be removed from
the list
if the study was powered, if there was
enough data,
so that they could, in fact, identify a
risk ratio
in the magnitude that we are looking at
here, in
the 1.5 range or so, but they would have
to get a
hell of a lot of patients to do it. It might not
even be practical to do that.
So, it is really a conundrum of
what to
do.
DR. GOODMAN: Dr. Fant.
DR. FANT: To address the question that
322
was posed about extending to other drugs,
I think
based on the data that we have looked at
here, at
least from what I have seen it is
impossible to
tell if the endpoints that we saw, if the
signals
that we saw were due to drug-specific
effects or if
they were due to factors intrinsic to the
disease
process in the patient that was perturbed
by
treatment by whatever mechanism.
It is kind of hard to sort out
which is
the major factor in that regard. Until that can be
sorted out, until you have some
information that
suggests, on a mechanistic basis, that it
is
related to a drug-specific effect, I
don't think
you can exclude any drug that impacts on
depression.
DR. GOODMAN: Take a moment and look at
the question or the statement, not a
question, but
the statement as it is proposed.
DR. TEMPLE: Is that intended to be
labeling language?
DR. GOODMAN: My understanding is that it
is not our job to write the labeling
language for
323
the FDA.
That is one of the reasons I wasn't sure
that we needed to take a vote, because I
don't
think that we should be writing these for
you, but
I think it does help to have something in
writing
here to communicate to the FDA how broad
our
concerns are.
Dr. Temple.
DR. TEMPLE: So, is this your proposal?
DR. GOODMAN: Two committee members have
proposed this.
DR. TEMPLE: My initial response to that
is it doesn't really say that you should
assume
this risk applies to all drugs. It says you should
use caution in pediatric patients. Well, we have
sort of said that already. It doesn't quite say
you should worry about that risk in
pediatric
patients.
We can work on it, too, but we are
interested in some view of how explicit
we really
should try to be even if you don't write
the exact
words.
That one is not so explicit perhaps.
DR. MARANGELL: I think we are just trying
324
to put forward, kind of the broadening
concept of
including both prior agents and future
agents that
are categorized as antidepressants and
where to go
from there.
DR. GOODMAN: Dr. Katz.
DR. KATZ: Fine.
I think we certainly get
the thrust of that, we appreciate
it. One question
that I think we would like you to
explicitly
address is whether or not you think this
is the
sort of thing that belongs in a black
box, which is
sort of another level of communicating
risk.
Right now it is a warning, the
major
language is in the warning--the language
is another
section--but the major language is in the
Warning
Section.
Do you think this arises to the level of
a black box warning?
DR. GOODMAN: Let me ask Dr. Nelson to
comment.
DR. NELSON: Let me comment on that, and
then just make a comment on the language
of the
second sentence. I think the difficulty with a
black box warning, at least my
interpretation, and
325
maybe it is based on my practice, is if I
see a
black box warning, I just don't do it,
for example,
propofol for long-term sedation in
pediatric ICUs,
no longer done because of the warning.
So, I think a black box warning
may drive
people away from drugs that they might
otherwise
appropriately use as opposed to a warning
that is
placed upfront in the Warning Section.
My difficulty with this
language, and I
know we are not going to talk language,
but I would
try to be more specific. I mean one of the more
difficult things to communicate, I think
even to
physicians, is risk data, and I kind of
liked the
slide that we were provided, that could
even in
this case, communicate data where you
could have
something like out of 100 patients
treated, 2 to 3
patients on average will have an increase
in
suicidal behavior or ideation after
initiation or
changes in treatment, period.
So, people say, well, what does
this
really mean, it means that if they give
100 people
the drug, they have got to watch out 2 or
3 times.
326
That, to me, is useful information, and I
would
advocate labeling that provides that kind
of
information.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I am just trying to interpret
the last statement, which is that we
should give
some quantitative estimate of what the
nature of
the risk is.
DR. NELSON: Well, it is more than that,
because I think it is an issue of
percentage. I
mean there is a lot of literature on whether
risk
is best communicated as numbers out of
100 versus
percentages versus other things, so I am
explicitly
saying I find the most useful thing is
real people
out of a real cohort of people helps me
know what
the universe is.
DR. TEMPLE: I would add that we should
probably tell people what the baseline
risk is and
what the increase compared to baseline
is.
DR. NELSON: I would also link this to
similar kind of data under the efficacy,
so you are
right.
327
DR. GOODMAN: Dr. Rudorfer.
DR. RUDORFER: A couple of questions.
First, about the tricyclic issue. My recollection
is there is some language already for the
older
antidepressants related to risk of
possible
clinical worsening early in the course of
treatment. I mean I am just wondering, if
something doesn't exist, or even if it
could be
moved within the labeling to be
comparable to
placement, say, of the newer--
DR. GOODMAN: Tom.
DR. LAUGHREN: Again, let me reiterate
what I suggested earlier. Our plan is to extend
this current, much broader warning
statement that
is now only in these 10 current
generation drugs to
all antidepressants including all the
tricyclics,
all the MAOIs. Some of them actually already have
it.
So,
you are right, there is that old
language in the tricyclics. That is going to be
changed to the newer language, and really
the
question here is whether you are
comfortable with
328
us extending this additional view, that
now we have
established causality for suicidality to
all
antidepressants, not just these nine
drugs that
were studied in these trials, and
pediatric
patients.
DR. RUDORFER: Do I understand correctly,
Tom, in the newer warning, that is where
the
description of the behavioral activation
is
mentioned, because again, what I am
wondering is,
if that specific language really should
be
applicable to the tricyclics.
I mean at our February meeting,
we were
describing a syndrome that I think the
sense of the
committees was that that was more
specific to the
newer generation drugs.
DR. LAUGHREN: The same kinds of behaviors
are seen in SSRIs, in SNRIs. I think an argument
could be made. I mean obviously, there is
a lot of
anecdotal data that the older drugs in
some
patients have the same kinds of symptoms,
so I mean
my inclination, in fact, some companies
have
already done it on their own. They have added this
329
new language to certain older drugs. It has
already happened voluntarily by
companies.
DR. RUDORFER: Just a follow-up question,
semi-rhetorical. I had asked this morning about
whether we know yet the impact of the
label changes
from March, and my understanding is we
don't know
yet.
Is there any rationale to
giving that
additional time to see the impact of that
change
before we make another change?
DR. LAUGHREN: You mean before we extend
the
language to the older drugs?
DR. RUDORFER: No, I mean before we change
the warning on the newer drugs.
DR. GOODMAN: Let me try it. My opinion
on that would be that now that the
committee has
decided that there is an association, at
least
within the trials, that I think the
language needs
to be extended to association has been
established
for suicidal ideation and behavior,
however we want
to say it. I think it has to be very careful how
we say it apropos of the earlier
discussion. I
330
think we need to define what we mean by
suicidality.
I think our present discussion
is whether
it should be extended to the other and to
the
present, and I don't think our discussion
is over
yet, but I think probably we are leaning
in the
direction of yes, extending it and erring
on the
side of safety.
DR. LAUGHREN: Just to clarify, the
current language in this warning that was
implemented as of our March advisory,
states as
follows:
"A causal role for antidepressants in
inducing such behaviors has not been
established."
So, the question that we have
been
addressing here this afternoon is whether
or not we
can now say that the causality has been
established, and the further question of
whether we
should extend that beyond these nine
drugs to all
antidepressants.
DR. GOODMAN: Tana.
DR. GRADY-WELIKY: I just wanted to
comment on the question of the warning or
black box
331
with whatever we decide on this, and I
would like
to agree with Dr. Nelson that certainly
having a
warning, and my preference would be for
all
antidepressants, would be an important
thing to do,
but
I would caution against using a black box
warning because it would steer many
clinicians away
from using these agents, and as we heard
yesterday
from both patients and clinicians, that
for many
people, antidepressants are very useful
treatment.
DR. GOODMAN: Dr. Mehta.
DR. MEHTA: Just a clarification from Dr.
Laughren.
If you are going to extend it to the old
drugs, I guess you will also extend the
same
warning to all the new drugs, is that
right?
DR. LAUGHREN: Yes.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I just want to remind
everybody that one of the major reasons
for using a
black box or a box is that you think
there is
something that can be done to avoid the
trouble
that you are telling people about.
Just telling people that
something
332
horrible has its own value, but it seems
particularly important to get people's
attention
when there is something we want you to
do.
In this case, there is
something that we
want you to do. We want you to pay attention, not
put
the people out to pasture for three weeks and
never see them again.
So, we certainly are cognizant
of the
effect this can have on prescribing, and
certainly
don't want to do harm, but I just want to
remind
everybody that this is potentially remediable
by
seeing the patient, talking to them,
being alert
for these things, one of the main reasons
for
thinking that you should emphasize things
by a box.
I just want to be sure that is on the
table.
DR. GOODMAN: How do you deal with the
fact that with the exception of
fluoxetine and some
of the other medications in some of the
anxiety
disorders, these are off-label uses, how
does that
gibe with the general use of a black box
where, in
fact, you don't have an indication to
start with?
DR. TEMPLE: It's a really good question
333
and requires great delicacy, but the box
is about
the warning, and we have on occasions
warned people
about things even though the use wasn't
approved,
so you have to be very careful. But if it's--what
is an example--the hyperpyrexia syndrome.
DR. KATZ: One example, we have done this,
as Bob says, in cases, and usually, what
we say is
here is a risk--specifically in pediatric
patients--here is a risk in pediatric
patients. We
remind you that this drug is not approved
for use
in pediatric patients, effectiveness has
not been
demonstrated.
So, we tell people it is not
approved, we
don't know if it works, but here is a
particular
risk.
So, there is certainly precedent for doing
that, and we have done that.
DR. GOODMAN: Ms. Bronstein.
MS. BRONSTEIN: If I heard nothing from
the public, it was they want to be
warned. They
want to hear the risk. I was thinking of big bold
letters, not the black box. From what I have
understood, the black box is used for
really dire
334
situations, and while suicide is a dire
situation,
what we are asking is that they monitor
patients
closely, that they ask their families to
participate in that monitoring process.
So, I see this more in the
realm of
informed consent, and I don't know what
we have
done in the past for more of an informed
consent
process.
Have we any drugs that we require an
informed consent?
DR. TEMPLE: We had a few where we did
that.
My own personal view is that gaining
consent, after all, you have to open your
mouth to
take it, is a little funny. What we have moved
more toward, but not entirely, is
something where
there is a required distribution of a
piece of
paper that says these things to the patient
and
some acknowledgment that they have read
it. It's a
little different concept for consent.
But we have done that in
particular cases.
It is very burdensome. If people are worried about
discouraging the use of the drugs, they
need to put
that in--
335
DR. GOODMAN: We are talking about
children.
It's assent, isn't it, and it is more
complicated?
DR. TEMPLE: Well, whether it is a matter
of displaying what the risk is in a piece
of paper
that someone acknowledges having
received, or you
want to call it consent, it is sort of
the same
thing, but it's a big step.
We have done it for thalidomide
and things
like that, but it is a very big
step. You have to
balance what effect you think it has on
the use of
the drug.
DR. GOODMAN: Dr. Trontell.
DR. TRONTELL:
Just to expand on Dr.
Temple's remarks, informed consent has
been used by
the Agency for drugs other than ones with
the
extensive systems like thalidomide and
clozapine.
It is used for several Parkinson's
disease agents,
as I recall.
It is often called, some call
it a patient
agreement. It is some way of setting forward some
kind of written system recorded often in
the
336
patient's chart, that basically, tries to
again
assure that this conversation occurs
between the
provider and the patient.
So, again, it clearly is one
area where we
are again stepping into that therapeutic
relationship, where some people take
exception to
the Agency doing that.
I had actually one additional
remark, if I
could make, relative to boxed
warnings. In
general, the Agency often uses those in
context
where the adverse event is associated
with
fatalities. Clearly, suicidal behavior can result
in that.
An incidental consequence of
that is that
products that carry boxed warnings also
have to
carry that in their advertising, and
quite
frequently, that makes it quite difficult
to
explicitly advertise that product in
direct-to-consumer advertising.
DR. GOODMAN: That you for that ad
information. How about in sampling, would it
affect detailing, sampling?
337
DR. TRONTELL: The requirement is if you
carry a boxed warning, that boxed warning
has to go
on all the materials that are used for
advertising.
I am not aware that it would impede
sampling, but
effectively, the advertising that goes
into popular
magazines or on the television can't
easily
accommodate that, so you don't get specific
products typically advertised that have
those
warnings.
DR. GOODMAN: Thank you.
Dr. Temple.
DR. TEMPLE: You can't use reminder ads
either.
DR. GOODMAN: I am sorry, I missed that.
DR. TEMPLE: You can't do something called
a reminder ad. That is where you just give the
name and don't say much about the
drug. You can't
do those anymore if there is a box.
DR. GOODMAN:
Dr. Newman.
DR. NEWMAN: I think those would be big
pluses.
As we move into the effects of the boxes
and what effects that might have on
prescribing, I
338
think we have to come back to the issue
of
efficacy.
We have I think very strong
evidence of
harm and really not very good evidence of
efficacy,
and although I know many practitioners
are
convinced that these drugs work, if you
look very
closely at the TADS trial, just as an
example, at
the Childhood Depression Rating Scale,
the
improvement with placebo was 19 points,
and the
improvement with the drug was 23.4 points.
You bring people in, you start
a
medication, and you see an improvement,
you are
very, very likely to believe that the
drug is
effective, and the reason why we do
randomized,
double-blind trials is because personal
experience,
however compelling, is not a reliable way
to tell
whether drugs work.
In the study where they worked,
in the
TADS, the improvement over placebo was
really very,
very small, and I would say not
detectable by a
clinician treating individual patients.
So, it would not be that bad if
use of
339
these drugs were diminished, I think,
because we
don't know whether they actually help
most patients
when you put together all the data, and I
think it
is very important that this conversation
about the
risks take place, so I would favor some
sort of
informed consent process.
DR. GOODMAN: I think it was appropriate
for you to remind us of the efficacy
issue as we
are starting to look about benefit, as
well as
risk, as we make recommendations and
regulatory
actions.
I agree and I think many of us,
including
myself, have said this in the room today
and
yesterday, that there is a dearth of data
on
efficacy.
We do have the positive trials that were
submitted, that led to the indication for
fluoxetine in major depression.
We do have the TADS data, and
actually, I
may have misspoken yesterday when I said
that there
was no difference between fluoxetine and
placebo on
the Children's Depression Rating Scale. That is
only true by one analysis, but if you
look at mean
340
comparisons, although they are small, you
are quite
right, that the magnitude of the
difference is
small, I think they still reach statistical
significance.
Where we lack the most data is
on
long-term benefit. I think what you are hearing,
what we heard yesterday from some of the
clinicians, what you are hearing from
some of the
people in this room who have treated
children with
antidepressants, sure, it is contaminated
by bias
and expectation. There is no question.
I have been humbled before in
terms of the
limitations of my own ability to discern
an effect
in the absence of a placebo-controlled
study, I
grant you that, but at the same time, we
are
dealing with drugs that have been out
there a long
time, numerous seasoned clinicians, and
there is a
very powerful impression among many, and
from the
consumers themselves, that in some cases,
this has
made a huge difference.
So, I worry that if we ignore
that
information, even though it is not good
data in the
341
way we would like to see it, that we may
risk a new
increase of suicidality on the back end.
We are doing a lot here to
protect it on
the
front end, but we haven't done the kind of
studies that were recommended before,
earlier by
Dr. Temple, and doing a discontinuation
study, and
I agree we don't know the answer, but it
is
conceivable that there will be some
patients that
will be deprived of those medications
that may be
life-saving and may even be inclined to
come off
medications and have a relapse that will
lead to
suicidal behavior.
I welcome other comments.
Dr. Nelson.
DR. NELSON: Although I agree with you,
Tom, I would be concerned that saying
that alone
without including drug-specific efficacy
data will
send the wrong message, and i think there
needs to
be a balance, and I would be curious how
my
psychiatric colleagues would react to the
following
suggestion, that if perhaps in
fluoxetine, you
included the efficacy data, which is the
only drug
342
that, in fact, has passed that bar, would
it be a
bad thing if, in fact, practitioners, who
are not
child psychiatrists, who lack the
knowledge to be
able to then, if someone fails
fluoxetine, to make
an appropriate choice of any of the other
agents.
If, in fact, what happened in
general
practice, family practice, general
pediatrics, is
fluoxetine was the first drug that would
always be
chosen, hopefully, under appropriate
monitoring
given the risk, but then if you failed
that, you
need help, that it is not something where
you will
go to multiple other drugs and start
running down
the list, thinking that if you just found
the right
one, you would be okay.
So, my question is can we
custom craft the
labeling where you might drive that kind
of medical
practice, and if we could, would that be
a good
thing?
DR. GOODMAN: Dr. Malone.
DR. MALONE: I think it would be a good
idea to customize the labeling.
DR. GOODMAN: I am sorry, I missed your
343
point.
DR. MALONE: I think it would be good to
customize the labeling, but in addition,
fluoxetine
is a positive study. As a clinician, when you look
at the PDR, I think it would be very
helpful to
have some balanced statement regarding
the number
of studies that were done, say, for
depression with
a given agent, and the number of studies
that were
positive and negative, because I mean I
think it
has been said before, when you look at
the PDR and
you see a statement that it is not
indicated for
under 18, it is quite a different thing
than to
know that there were five studies done
and none of
them were positive.
You could add statements that
negative
studies don't mean it doesn't work, but
it would be
helpful for me, as a clinician, to be
able to read
that information.
DR. GOODMAN: Dr. Pine.
DR. PINE: I just have a couple of
comments related to the discussions that
have been
going on, the first of which is, you
know, we
344
really have not talked about the efficacy
data, and
I think it is very important to spend a
fair amount
of time talking about that.
The second thing is, for
reasons that I
will go into in a second, I would agree
with some
of the sentiments related to concern
about adding a
black box warning, that I would be
concerned about
that, and I think probably some of the
most
compelling data, at least to think about,
is to
look carefully at the efficacy data for
fluoxetine.
There are a couple of things to
say. The
first is to remember that based on the
efficacy
data alone, even before we had the TADS
trial, that
those data were felt to be sufficiently
compelling
to justify an indication in pediatric
depression.
Now, the second thing to say
about the
fluoxetine data in general is at least
when I look
at the magnitude of the effect in that
study,
relative not only to other effects in
pediatric
depression, but relative to other effects
of
psychotropic agents in many disorders, I
think one
would not call that to be a small effect.
345
In fact, I think the
investigators and the
journal itself called it a moderate
effect, which I
think is a fair summary of that effect.
The third thing to say is, if I
am
correct, although I would like to hear
from the FDA
about this, thus far the only warnings
that have
been given make no explicit statements
about
causality, number one, and then number
two, make no
explicit differentiation between the
potential for
the risk being greater in children
relative to in
adults.
I think just based on what I
have heard,
clearly those two statements could be
made
relatively strongly that there is
something
different going on in kids than adults,
at least
based on the level of review that we have
had that
hasn't been said, and it is pointing to
causality.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: Well, we still believe the
general warning about paying attention to
people
still should apply to adults and
children, we don't
want to change that, but as was said, it
now says
346
causal relationships not established, and
you don't
think and we don't think that that is a
true
statement anymore about the pediatric
population.
So, the thought would be to
add, modify,
something to convey what the new findings
are.
I want to make one other
comment. There
are various ways of communicating with
patients and
their families. Some kind of form to sign is one,
but there also is patient labeling that
can be made
to go to every patient who gets
prescribed one of
these drugs.
We have done that for a very
large number
of drugs.
They are called Med Guides at present,
and they can be focused on the particular
concerns
that one has and the risks that there
are, and we
would obviously have to dance around the
fact that
the drug isn't indicated for children,
but there
are still ways of doing that.
So, that is not causing a form
to be
handed out in the office, but it is a way
of
communicating. As I said before, the probability
that that will be distributed, we think
goes up
347
when it becomes part of a package, part
of a unit
of use package.
DR. MURPHY: But we need to make clear
that the Med Guide is different than the
patient
package insert, that people often think
about that
comes with the regular label.
What might be helpful to think
about,
there is two things, what you want to
warn about,
where you want to put it or how you want
to put in
the label, black box, warnings,
precautions, people
talk about bolding versus how do you want
to get
the information out to others besides the
learned
intermediary.
That is where Dr. Temple is
talking about,
you know, do you want it just to be in
our standard
patient information in the label, which
does not
have to be given to a patient. A Med Guide would
require that it be given to the patient.
That does not address the issue
that I
have heard also from you about where does
the
communication between the learned
intermediary and
the patient occur.
348
So, if you could think of that
in three
different places, there is the learned
intermediary
information, there is the information for
the
caretakers between the learned
intermediary, and
then there is the Med Guide where the
patient gets
the information whether that person has
had that
conversation with them or not.
DR. GOODMAN: One way of testing the
confidence of this group in the efficacy,
albeit
unproven, of the antidepressants in the
pediatric
population--here I speak specifically of
depression--is to go the next step, the
step that
the British counterpart of the FDA made.
We haven't talked about that,
but it
certainly has been mentioned, suggested
in the
public hearings, or I would like to
engage this
group in some discussion to see if there
would be a
recommendation to ban the use of all the
antidepressants with the exception of
fluoxetine in
the pediatric population.
I am not saying I agree with
that, but I
think we should air a discussion.
349
Dr. Nelson.
DR. NELSON: A question for FDA
colleagues. One of the presentations, it might
have been Dr. Laughren might have
mentioned that
contraindication means different things
to
different regulatory agencies, and I
would be
curious if you could just be specific and
say what
does contraindication mean in Great
Britain, what
does contraindication mean in the United
States to
help answer that question.
DR. LAUGHREN: My understanding of what it
means in the UK is that, in general, the
drug
cannot be used, but under specific
circumstances,
for example, by certain specialists it
may be used,
so it doesn't mean quite the same thing
as it does
in
this country where if we put a contraindication
in the labeling for a product, that means
nobody
under any circumstances should use
that. There are
no circumstances where it would be
appropriate to
use that drug. That is generally the way it is
interpreted by clinicians.
DR. GOODMAN: Let's go with that for a
350
moment, a discussion of whether these
drugs should
be contraindicated with the exception of
fluoxetine
in pediatric depression.
Dr. Malone.
DR. MALONE: You just said it in pediatric
depression. I was going to say that two of them
are already indicated in some childhood
anxiety
disorders, but apart from that, I would
be against
banning the drugs. I think that would be a big
different step.
As has been said, just because
studies
have not proven efficacy doesn't mean
that there is
not efficacy, and if you failed on Prozac
in
depression, you wouldn't have many other
options.
So, I would really be against banning
them.
DR. GOODMAN: Dr. Wells.
DR. WELLS: I agree with Dr. Malone, I
would not favor banning the other
antidepressants
other than fluoxetine, because many of
these
children will not respond to fluoxetine,
and they
certainly deserve to have access to other
drugs
should that occur.
351
However, I do believe that the
labeling of
Paxil should provide information
consistent with
the June 19th, 2003 FDA talk paper
recommending
that Paxil not be used in children and
adolescents
with MDD in light of the lack of proven
efficacy
and the troublesome documented signal for
suicidality in that population.
I further believe that we
should recommend
a similar labeling change for
venlafaxine.
DR. GOODMAN: Dr. Gorman.
DR. GORMAN: I think that the black box
warnings in terms of labeling makes a lot
of sense
especially since I think there is a way
to also
increase transparency to the learned
intermediaries, as well as the people who
use the
medicine.
I would strongly recommend that
the Food
and Drug Administration reconsider an
active
labeling in the pediatric section where a
single
sentence where it says Pediatric Usage,
"After 3
randomized, controlled clinical trials
including
600 patients, this medicine was not
proven to be
352
effective."
I don't think that takes a lot
of space, I
don't think it's very confusing, and if
you need to
then reference the summary that is
available for
these pediatric studies at another place
on your
web site, I think that is perfectly
appropriate.
I understand that creates some
other
difficulties for you, but I think that if
you put
it in the Pediatric Use Section, it
increases the
transparency.
So, then someone can say who
wants to use
Paxil, this drug has been used in 700
children in
controlled trials, and it did not meet
the bar the
FDA said, but I think it has some
potential benefit
for my patient, then, they have the data
to at
least start to make a decision about
that.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: Do you have a view on what we
should do with a drug that had one
positive and one
negative study?
DR. GORMAN: I do.
DR. TEMPLE: That's not wise guy, I mean
353
we are going to face that problem.
DR. GORMAN: I think you will face that
problem because there is one of those
drugs already
there.
DR. TEMPLE: That is why I asked.
DR. GORMAN: I think you should say there
has been one positive and one negative,
and that
doesn't meet the bar the FDA sets. You can then
argue.
Then, people will start to argue with you
whether the bar is too high or too low,
but I think
that if you make it transparent, which is
my
understanding, speaking for myself and
not my
academy, my understanding of the intent
of the Best
Pharmaceutical for Children's Act, that
this should
make--the public is paying for these drug
trials
with increased consumer prices, and
therefore, they
have the right to the results of that data.
I think that data should be
reflected in
the label even if it's troublesome to the
Agency.
DR. TEMPLE: As I said, we are moving in
that direction. We haven't quite gotten there yet,
but we have had many of the same thoughts
you have
354
expressed.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: I would strongly support what
Dr. Gorman just said. It seems to me that what we
know at this point is there is a drug for
which
there is moderate evidence of efficacy
and a whole
bunch of drugs for which there isn't, but
we don't
really think we have good enough data on
those
latter drugs, both in the sense of
short-term
efficacy trials, and more importantly,
long-term
efficacy trials, and somehow or other we
need to
get that information out in some useful way.
Second, I think we know that
there are no
trials for these drugs in things like
migraine,
headaches, minor acute depression, and
other things
that could be very, very risky.
Third, we know something about
causality,
but we know causality, unfortunately,
only in the
SSRIs, but we have no evidence that other
antidepressants have any likelihood of
being less
causal.
DR. GOODMAN: "Causal" with regard to
355
suicidality?
DR. PERRIN: Suicidality.
DR. GOODMAN: It isn't just the SSRIs.
DR. PERRIN: I am sorry, the nine drugs
that we are studying, my apologies. But we don't
know that it covers all
antidepressants. I think
we can leave that out and say basically,
we have no
evidence that any other antidepressant is
better or
has less risk or whatever.
I think finally, we should say as
explicitly as we can some of the comments
that Jean
has raised and others have raised about
the
explicit elements where people should be
particular
vigilant about risk, the timing issues,
the type of
patient issues, et cetera. I think we should be
very clear about that.
DR. GOODMAN: Dr. Rudorfer.
DR. RUDORFER: I think what we are talking
about is how to titrate the warning, if
you will.
One thought I had, we are clearly not
going to be
able to settle the efficacy issue today
because we
don't have the data before us. Again, as was just
356
mentioned, there are better efficacy data
in the
anxiety disorders than we have seen in
major
depression.
What I am thinking is the
overriding issue
that we had coming in, which I think
remains with
us, is how to discourage irresponsible
use of these
antidepressants in the pediatric
population
while--I don't want to speak for anybody
else--but
my sense is that we don't want to
discourage
appropriate responsible use of these
drugs by
clinicians who are in accord with the
warnings as
they now exist, that is, who are
monitoring
patients responsibly.
So, one thought I had was in
terms of
having a bolded section in the warning,
but the
bolded part would not be the adverse
effect. The
bolded part would be what we want
clinicians to do,
that is, wording to the effect that close
patient
monitoring is required during use of this
medication especially early in treatment
and at
times of dosage changes.
That is just one thought off
the top of my
357
head, again directing attention to that,
and I
don't know if language such as required
is
appropriate, but something along those
lines to
send that message to the clinician that a
higher
standard of care is required with this
drug, again
certainly including other warning
language as we
have been discussing, but my point being to
find
the right titration where we are not
scaring off
appropriate use of the drugs.
DR. GOODMAN: Ms. Griffith.
MS. GRIFFITH: We are about bouncing
around a bit when you raised
contraindicating, the
possibility of contraindication and then
going back
to the best methodology for informing
patients and
practitioners.
I was compelled by the
arguments both Dr.
Nelson and Dr. Pine made with respect to
the black
box, and I am wondering if it is not now
a
knee-jerk reaction when a doctor sees a
black box
warning, as you suggested, Dr. Nelson,
just to
absolutely refuse to use that particular
medication, and, if so, I think that that poses a
358
hazard to the ability for a doctor, a
psychiatrist
hopefully, in using that drug in his or
her tool
box.
I also, no disrespect intended to
Drs.
Temple and Trontell, when you said that
by
developing a mechanism, either informed
consent or
patient information letter would be
burdensome, and
I believe that Dr. Trontell said that the
FDA does
not like to get in between the patient
and the
provider by dictating what a provider has
to do by
way of informing, I think that that is
wrong. I
don't think burdensome is the right way
to look at
this.
I mean it may be burdensome,
but it is
absolutely necessary, and I don't think
that the
FDA should feel that they can't advise
doctors and
caregivers to be very forthcoming and
very
interactive with the patient, so I would
recommend
either a letter or--
DR. GOODMAN: Tom, you had a comment?
DR. LAUGHREN: We actually have a
precedent for an informed consent in the
pediatric
359
area in child psychiatry for Cylert. There is a
consent form. The problem is that it is voluntary,
and it is not clear how much it is
actually used.
Maybe some of the child
psychiatrists here
who have used Cylert can comment on
whether or not
they actually use that.
DR. PINE: I can tell you that the safety
issues around Cylert, when they became
public, led
to a dramatic decrease in the use, and I
think it
had more to do with the nature of the
concern than
the process that was used to
monitor. So, I don't
know that this situation is completely
analogous.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: A number of us have to leave
within the hour, and Dr. Temple, I
believe has now
raised at least two specific questions
that he
wants us to I think put to a vote. I am kind of
concerned, I mean I would like to at
least frame
those two questions and see if we can at
least
accomplish that.
As I heard them, what I would
like to do
is if we go back to the text before this
one, of
360
what we had for Question 3, and then I
think you
were asking us does this apply to all
antidepressants, and we go around Yes/No,
and then
I think the second question, which is
extremely
important, is does some semblance of that
information go into a black box. I think in that
case, it might be within that black box
at least
for, say, fluoxetine, within that box
there is some
statement of the efficacy data.
I really am very, very
concerned that the
signal-to-noise ratio, the amount that is
spent in
direct-to-consumer advertising, even the
patient
information sheets, none of that really
gets the
attention it deserves.
We may not agree with this
data, it may
not be what we wanted to find, but what
we are
sitting with is no--with one
exception--no evidence
of efficacy, and what we have is evidence
of some
causal relationship.
As we were instructed, the
evidence of a
causal relationship for a warning that we
want to
really get across doesn't have to be
beyond a
361
reasonable doubt. It may be beyond a reasonable
doubt for efficacy, but for warning and
drawing the
appropriate attention and concern to
this, I think
we really need to put that.
So, I am sort of dealing with
those two
questions, if we could, Mr. Chairman,
frame those
questions and vote on them before we go
ahead.
DR. GOODMAN: Unless I suffered a stroke
here, I think we already voted on the
first
question, Question 3, that has already
been voted,
and I don't think we need to have that
3(b) in
there, because the implication of 3(a) is
that we
did not exempt any of the
antidepressants, at least
when we were talking in terms of the
trials.
I think what you are getting at
is in
whatever form the warnings take, should
that be
expanded to all the antidepressants, and
although
we didn't vote on that, my sense from the
discussion is the answer was Yes.
So, I think we have already answered
that.
Partly because there isn't that much time
left, and
I do really want to end at 5 o'clock, is
unless
362
there is a compelling reason, I do not
want to
subject these additional questions to a vote.
The only one that I think that
perhaps
might merit a vote at this point is the
black box,
but still let me remind the committee
that we are
not making decisions, we are making
recommendations, and it will be up to the
FDA
whether or not to implement that
recommendation.
Dr. Katz.
DR. KATZ: There is one other labeling
question we either need you to take a
vote on
quickly or just sort of get a general sense,
but
that has to do with the contraindication
question
and whether or not the sense of the room
is that
they should not be or should be
contraindicated.
DR. GOODMAN: I would rather start at that
end.
I agree with that, and I think what I would
like to do is after just a few more
moments of
discussion, equivalent to the British
ban, we are
using the word contraindication, or any
other
discussion before we take a vote on
whether this
committee would support contraindication
of all the
363
antidepressants except fluoxetine in
major
depression.
Dr. Nelson.
DR. NELSON: My interpretation of the
meaning of the two words in the two
different
medical systems is that contraindication
in the
United Kingdom is not a ban, and is
simply a way of
driving the use of these drugs into the
hand of
appropriately qualified specialists.
If that interpretation is
correct, then,
contraindication in our system would not
be the
equivalent response, and if we think that
that was
the
correct thing for them to do, the question is
do we have another mechanism available to
us here,
such as adding a kind of oncology type
warning
about appropriately qualified specialists
to
accomplish that.
In my mind, saying it should be
contraindicated here is a very different
meaning.
It would be a ban in the United Kingdom
perhaps,
but contraindication there was not a ban
from my
interpretation of what I was told.
364
DR. GOODMAN: In the UK, they were banned
is my understanding.
Dr. Temple.
DR. TEMPLE: Well, no, there is wording
that sort of suggested if you are
properly trained
and really need to, you can do it. But a
contraindication here, and you can safely
vote on
that, means we think--we think you can
still do it,
we don't control your pen--means we think
there is
no circumstance in which anybody should
use these
drugs for that purpose.
DR. GOODMAN: But at the peril of the
prescriber.
DR. TEMPLE: The prescriber doesn't have
to pay attention to our labeling, and
sometimes
they don't, but it would reflect the view
of us,
and presumably the manufacturer that
writes it, the
rightful labeling, that you should not
use these
drugs for that purpose. There is no case in which
the benefits outweigh the risks. That is what it
means.
DR. GOODMAN: More discussion on
365
contraindication?
Dr. Malone.
DR. MALONE: If you contraindicate it for
major depressive disorder, is it
automatically
contraindicated for off-label, or what
happens to
all these other uses?
DR. TEMPLE: Off-label use is not
discussed in labeling. That is why it is called
off-label use. We know perfectly well that people
have been using these drugs in pediatric
patients
even though it is not in the label.
A contraindication actually
would tend to
discourage that use, because you are then
reacting
not to silence, but to a specific
statement that
says you really shouldn't do this. So, it changes
the present situation, there is no doubt
about it.
DR. GOODMAN: Ms. Dokken.
MS. DOKKEN: Just a quick question of
clarification. What is the impact of
contraindication on further research?
DR. TEMPLE: Well, further research is
currently very difficult because everybody
has got
366
its exclusivity, that is the main
impediment to me,
further research. I don't think a contraindication
necessarily means that no one is going to
bother to
study it further.
I don't think we have practical
experience
that gives that answer, and it might
discourage it
some.
I don't think we know.
DR. KATZ: But it doesn't legally preclude
it or anything. It can be done.
DR. GOODMAN: Dr. Leslie.
DR. LESLIE: Just in the interest of time,
I would like to move that we do not
accept a
contraindication, but we do suggest that
there be
wording to such that these medications
should be
given by people trained in their
appropriate use.
I would be worried about saying
subspecialist because there are a number
of primary
care doctors that have no access to
mental health
professionals in rural communities or
urban
Medicaid areas, and you would be doing a
disservice
to those populations, but if you said
trained in
the appropriate use, it goes back to
their
367
professional bodies to come up with
appropriate
continuing medical education for the use
of these
medications.
DR. GOODMAN: Now, we do not have to take
a vote on this. We can just continue to discuss
it.
DR. TEMPLE: I just want to remind
everybody that it is really hard to give
instructions for use of something that
isn't
approved for use. I am not saying we can't figure
out a way out of it, but it is a very
thorny
problem and we are sort of bound by our
own rules,
but it kind of implies that you should
use it when
you tell people how to get trained for
using it.
DR. GOODMAN: Dr. Marangell.
DR. MARANGELL: I like the idea of the Med
Scrip [ph] where the patients get
information and
the family gets information.
A question. Is there a way to ban direct
consumer advertising without a black box?
DR. TEMPLE: The black box doesn't ban it.
You just have to incorporate the black
box or its
368
elements anyway into the label.
Our conclusion was that
direct-to-consumer
advertising was legal, and that is why it
became
allowed.
There is nothing in the law against it.
Therefore, under at least many
interpretations of
the Constitution, you are allowed to do
it, and our
rules.
So, I don't know if there is a way to--I
don't think there is an easy way to ban
it.
We would not allow reminder
ads. I don't
know whether that is important to
anybody, but
those are not allowed.
DR. GOODMAN: Let me express the Chair's
view on the contraindication. I would oppose it.
If we took a vote, I would definitely
oppose it. I
am repeating myself here.
I would disagree that there is
no data
outside of fluoxetine. There are data supporting
efficacy.
They are not great data, they are not
very good data, and they are very limited
data.
There are some negative data certainly
from the
clinical trials, and most of the data
that we have
is anecdotal experience, but it is not
from one,
369
two, or three people. It is from a multitude of
trained clinicians and patients.
Now, they could have been
misled. They
could have misled themselves into their
being an
effective drug when there was just a
nonspecific
effect of the therapeutic encounter or
time alone.
We know that, I know that, but
I can't
ignore, as we can't ignore some of the
public
testimony about instances that seemed to
implicate
the medications in suicide.
We also can't ignore the
possibility that
there is data out there that we don't
have in a
form that we can analyze to our
satisfaction that
points to the effectiveness and the
protective
action of these drugs against suicide,
particularly
in the long-term treatment of depression.
In the absence of those data,
in the
absence of, say, negative studies, I
would be very
reluctant to deprive patients of that
opportunity.
So, I am not ready at this point, given
what we
know, to ban the antidepressants.
Other comments? Dr. Fant.
370
DR. FANT: In listening to the various
comments, is it reasonable to emphasize
the
concerns with a black box and include
wording in
the black box that gives the serious,
knowledgeable, committed caregiver
license to make
choices that someone less qualified or
less
thoughtful would make under those
conditions?
I mean I think there are a
number of us,
when we take care of kids, institute
therapies that
are more risky than other situations when
we are
faced with limited options, but we do it
thoughtfully, or at least we try to do it
thoughtfully.
Is there any way to sort of
strike that
balance with the black box and the
wording?
DR. GOODMAN: Let's ask the FDA. What
kind of liberties do you have within the
black box?
DR. TEMPLE:
What you usually put in a
black box is a warning about the adverse
consequences of the use of the drug, and
so you
would say we know this about use in
pediatric
populations or whatever, and then
therefore, it
371
says therefore, you really should monitor
closely,
and I guess you could stick in there,
therefore,
you should be particularly aware of the
signs of
symptoms of deterioration or something
like that.
We could think about that.
Those things are all
possible. It is a
little tricky to sort of identify
responsible
versus non-responsible physicians like,
you know,
only responsible physicians, and you know
who you
are, should use this drug, but you can
certainly
say what they should be worried about and
what kind
of thinking they should go through.
DR. GOODMAN: Dr. Maldonado.
DR. MALDONADO: Just a quick comment on a
ban or contraindication and box
warnings. There
was a question about the impact in future
research.
I just remembered that a ban in the UK is
probably
not regulatorily different than a ban in
the United
States, is that the enforcers in the
United States
are lawyers, and we live in a different
kind of
environment. The FDA doesn't enforce that, but
companies already know that with these
restrictions
372
in the label, they are going to have
tremendous
liability to do any future studies.
Again, the ban in the UK is a
ban in the
UK, but physicians may take risks in the
UK that
physicians in the United States may not
be willing
to take.
DR. GOODMAN: Thank you.
Dr. Nelson.
DR. NELSON: One suggestion in terms of
allowing the kind of information you need
would be
to have more of that information in the
Pediatric
Use Section, and just refer to that
section out of
the black box. You want the black box to be to the
point.
The only other question I would
ask the
group is have we had enough discussion
about the
Med Quick or whatever the name is for the
patient
information to have formulated a view as
to whether
there would be a recommendation to
develop that
kind of a document, because that is one
thing I
heard is a need certainly from the public
testimony.
373
The label is one thing, but
having it in
language that could be understood, maybe
physicians
will then read that document, would be a
useful
thing.
DR. GOODMAN: Dr. Fost.
DR. FOST: I wanted to get back to that
patient information thing and follow up
on Dr.
Rudorfer's comment, that both the message
to the
patient and the physician has got to
include this
importance of monitoring, but I haven't
heard any
discussion yet of what monitoring means.
Does it mean seeing the patient
once a
week, if so, by whom? Twice a week, once every two
weeks, is it phone contact
monitoring? Does FDA
get into that depth of defining
terms? The word
"monitoring," to me means
nothing. I mean I have no
idea what it means.
So, until somebody defines it
for me,
seeing it in a package insert doesn't
tell me, as a
physician, what it is I am supposed to be
doing,
but I have a sense that it is critical,
that it is
very important that the patients be
monitored
374
closely.
MS. DOKKEN: Dr. Nelson just asked about
the Med Guides. My question is they go directly to
the patient from whom, the clinician or
the
pharmacist?
DR. TEMPLE: They are given out by the
pharmacist, and they are required to be
given out,
but we don't think they necessarily
always are, but
they can be attached to the prescribing
package,
that is, to a unit of use package. In quite a
number of cases, we have converted drugs
to unit of
use packaging in part so that they would
carry the
Med Guide, because then they always have
it.
DR. TRONTELL: I don't know if this was
your point. The patient would get the Medication
Guide presumably after they have already
filled the
prescription.
MS. DOKKEN: So, it isn't necessarily an
opportunity, sort of a planned opportunity
for a
conversation with the clinician.
DR. TRONTELL: If you want the patient to
be informed before they actually receive
the drug,
375
you would need to be do something in
addition to
the Medication Guide.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: As we are not voting on
these issues, I just wanted to make a few
brief
comments.
I would strongly support the black box,
and I have to say we heard yesterday and
I know we
have discussed this a number of times on
the
Pediatric Advisory Committee, I think,
for me,
package inserts are a legal document
between the
company and the FDA, but I don't think
they are
read.
We heard from a physician who
presented
yesterday afternoon that he had not read
the
package insert, didn't know what was in
the package
insert, so I think we can put whatever we
want in
there, but I think if you took a poll
around this
table, most of us do not--that is not
where we get
our information.
So, I think anything other than
that is
important. I think the black box is
important, I
think the Web Guide or Med Guide, I think
attached
376
to the box is fabulous, but we were also
discussing
the possibility of having a site on the
FDA
internet site, which is very visible,
very easily
navigated for the public to discuss
adverse events.
Ms. Griffith and I, she was
informing me
about the FDA web site and how difficult
it is
currently to get the information on
adverse events,
and I think that that is another route
that if you
had advisories that were easily
accessible, where
patients could go in and get that
information
before or when the physician says I am
going to
prescribe this, but you can go back and
get
information.
So, I would just add those
comments.
DR. GOODMAN: Ms. Bronstein.
MS. BRONSTEIN: I just want to reiterate
again, I think that the family and the
patient must
receive something. I think having the Med Alert
come with the drug itself is a good
mechanism
provided the information on there talks
about
suicidality.
I think we have to be really
clear about
377
what the risks are that the patient has
to call the
physician about, even if the physician
doesn't
invite that half of the conversation.
I guess I vote against the
black box. I
want to be pretty specific about
that. I think we
heard very clearly from family members
that drugs
were helpful, we heard some that were
very
unhelpful, but the biggest message that I
heard
from the consumer is they want to be
warned about
what the risk is.
DR. GOODMAN: So, did you say you would
vote against it?
MS. BRONSTEIN: I would vote against the
black box, but I would vote for the Med
Alert going
directly to the patient. I think information
should go to physicians on monitoring
importance
and frequency of visits.
DR. MURPHY: You can do both. I just want
to make it clear, one does not rule out
the other.
MS. BRONSTEIN: I understand.
DR. MURPHY: I think you should look at
what is in the labels right now, too,
because that
378
is the other thing. We already have
bolded
information in the Warning Section.
MS. BRONSTEIN: I felt the bolded
information was a good beginning, but I
think we
need to go further.
DR. GOODMAN: Dr. Pine.
I would like us
to take a vote on the black box
issue. I think we
have had sufficient discussion. It is not clear to
me what the preponderance of opinion is,
and I
think we won't know until we go around
the table.
First, Dr. Pine.
DR. PINE: Two brief comments, one
definitely relevant to the black box, the
other
indirectly relevant.
One thing that we haven't
talked about
that relates directly to the issue of
restricting
access or reducing access to treatments
is we
didn't talk about what are the data for
other
available treatments for children who
suffer from
major depression.
In some ways, some of the most
disturbing
or concerning findings are the data for
cognitive
379
behavioral psychotherapy from the TADS
trial,
because while you can debate to some degree
about
the magnitude of the effect of
fluoxetine, I think
that there has been little debate about
what the
study says about cognitive behavioral
psychotherapy, which currently is considered
the
best documented effective
psychotherapeutic
treatment for pediatric depression.
The data from the TADS trial
were very
clear.
That treatment was inferior to fluoxetine
alone, and it was no different from
placebo. So,
that is number one.
Number two, I am sympathetic to
the views
from the FDA that, you know, saying that
this is an
unusual circumstance and we are not
really sure
what to do, and I would, again, just
speaking for
myself, say that I think it calls for
some very
careful thought about how we are going to
need to
think about these kinds of issues
differently
relative to what the current options are,
because
there are a couple of highly unusual
things about
pediatric mental illness right now, one
of which is
380
that the majority of treatment with
psychotropic
agents, at least to the extent that we
have talked
about it, is off-label use, which I think
is a
problem that we all agree that we can't
ignore.
The second is that the level of
knowledge
in pediatric mental illness right now, in
general,
is not sufficient, so that we can make
very strong
statements.
So, I guess just in closing, to
echo some
of the statements from Dr. Bronstein, I,
too, would
not favor the black box. I am not sure what else
we
need to do. I think we need to do
something
clearly more than what has been done, and
there
might not be a current available thing to
do.
DR. GOODMAN: Let me ask a question as we
are trying to compose the question
here. Is the
black box warning to contain information
only about
risk, or does it also contain an
evaluation of
relative benefit and risk? If the latter is the
case, then, fluoxetine would be exempt.
If what we are trying to do in
the black
box is convey risk, then, it should be
consistent
381
with our earlier votes and apply to all
antidepressants in the entire pediatric
population.
Dr. Katz.
DR. KATZ: I think you can do both. I
think you can say in a black box--first
of all,
black box is primarily for risk, but it's
a
warning, right, since it clearly is
intended to
convey a risk, but you can say this risk
exists in
pediatric patients, and this drug has not
been
shown to be effective in pediatric
patients.
For a drug that has been shown
to be
effective, you can just say here is the
risk, and
the drug already carries the indication
in the
label.
So, you can tailor what is in the black box
depending upon what you know about the
drug, both
for risk and effectiveness, but it is
primarily for
risk, but you can handle that within the
black box.
DR. GOODMAN: So, the black box for
fluoxetine, you might have a statement in
terms
of--
DR. KATZ: I don't know, but you might not
say anything about effectiveness although
it is
382
already in the indication. In other drugs, you
might say here is the risk and, by the
way, we
remind you that it has not been shown to
be
effective. We can sort of play with the language.
DR. GOODMAN: In any event, it seems like
this warning should be broader. The question
should apply to the pediatric population.
DR. KATZ: Right, it should not be limited
to depression.
DR. GOODMAN: It is not limited to
depression consistent with our earlier
votes.
DR. KATZ: Right.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: Each one of us may have an
opinion. Why don't we just plan then to
use our 30
seconds to express it relative to what
should or
shouldn't be in and how to link it rather
than
trying to agree on that before we vote.
The box is fine, just in terms of
what
goes in it. We may have different views,
and we
could just then express that as we vote.
DR. GOODMAN: I agree with that.
383
Dr. Leslie.
DR. LESLIE: I just wondered if you could
summarize the advantages and
disadvantages of the
black box, because we have kind of gone
all around
it.
DR. GOODMAN: I have a volunteer. Dr.
Maldonado.
DR. MALDONADO: I think that it might
actually be very good to know if the
committee
knows the criteria for precautions, one,
in black
box.
It seems that people are all over the place.
I think that the FDA has criteria. It may not be
very strict, but it might be good to
receive that
kind of guidance before you vote.
DR. GOODMAN: Dr. Temple.
DR. TEMPLE: I wish I could remember. We
put out a draft guidance document. Basically, a
black box warning is for something you
want
everybody to pay attention to, and the
reason you
put it in a black box, it is more visible
that way,
and people pay attention to things that
stand out.
You can emphasize things by
using dark
384
print, too, but the black box is
prominent, it's
the first thing you see when you come to
labeling.
It is always at the top. Then, in relative reform,
and it may be expanded on later, but it
is supposed
to catch everybody's eye. It shows up more or less
the same way in promotion, so you see
it. That is
the reason.
It is used for things that
matter, for
things that can be fatal, and I would add
it is
particularly attractive where there is
something
you can do about it.
DR. GOODMAN: I think, in my mind, the
advantages are it attracts attention, it
is an
attention getter. The disadvantages, which may
also be the advantages, it will
discourage use, and
it may have some implications for the
ability of
the manufacturers to promote their
products, market
their products, at least in some forms,
which again
might be, depending how you are looking
at it, an
advantage.
We need to go to a vote. We are going to
start at this end of the table.
385
Dr. Santana--oh, Dr. Santana is
gone.
Okay.
Dr. O'Fallon.
DR. O'FALLON: Because people are leaving,
could you ask them to vote on both the
black box
and the Med Guide?
DR. GOODMAN: I don't think we are going
to have time to take all those
votes. We haven't
finished talking about new studies.
DR. TEMPLE: We are assuming from
everything that has been said that people
like the
idea of the Med Guide.
DR. GOODMAN: We don't need to vote for
that.
Dr. O'Fallon.
DR. O'FALLON: Black box, I like the idea,
yes.
I vote yes. I think the idea of
having the
two flavors, one for those that have been
shown
efficacious and those that haven't is a
good idea,
so I like the idea.
DR. GOODMAN: Dr. Pollock.
DR. POLLOCK: Yes, I also vote for the
386
black box with the same comment as Dr.
O'Fallon.
DR. GOODMAN: Dr. Wells.
DR. WELLS: I would vote against the black
box because of my concerns that it would
decrease
access to many patients who need to have
the
medications.
DR. GOODMAN: Dr. Newman.
DR. NEWMAN: Yes, on the black box, and I
guess I would like to emphasize what Ms.
Bronstein
said, that I think this is great for
informing the
physician, and the Med Guide is good for
informing
the patient, but it is important to have
that
discussion about the risks and benefits
at the time
the drug is being prescribed, and I don't
think the
black box will accomplish that.
DR. GOODMAN: Thank you.
Ms. Dokken.
MS. DOKKEN: Yes, on the black box, and if
we adjourn before, I also want to say I
think the
Med Guide is great, but it is too late
and does not
involve that opportunity to have a
discussion
between the clinician and the family and
patient.
387
DR. GOODMAN: Irwin has departed.
Marangell.
DR. MARANGELL: I am actually very torn on
this issue. I think it is essential that we get
the
word out. I am very concerned about a
backlash
against people who really need
appropriate
treatment and not getting it,
particularly since
there is a dearth of specialists. I will vote
therefore no on the black box, but support
the
revised bolded warning, the Med Quest,
and perhaps
some additional education efforts.
DR. GOODMAN: Robinson.
DR. ROBINSON: I would vote yes in the
sense that if we are really saying that there
is a
potentially fatal side effect that might
occur in
2, 3 percent of children taking these
drugs, I
think we have to in some way make sure
that that
information gets out.
I am not really as concerned in
some ways
of black box bolding. I just think that we need to
make sure that a potentially fatal side
effect with
2 or 3 percent of the population needs to
get out
388
there.
DR. GOODMAN: Leslie.
DR. LESLIE: Yes, on the black box, yes,
on the Med Guide, and then I also just
come back to
exactly what some of the other people
have said,
the importance, but I think this goes
back to the
professional bodies, and I don't know
what the FDA
can do to push this from bodies like the
American
Academy of Pediatrics, et cetera, but
guidelines
for informed consent, guidelines for
follow up and
monitoring, and then it really bothers me
that the
majority of education on these
medications is done
in CME that is funded by pharmaceutical
companies,
and I don't necessarily feel that it is
always a
fair perspective.
So, I also think pushing for unbiased
reporting of results and in continuing
medical
education.
DR. GOODMAN: Griffith.
MS. GRIFFITH: I have to say I, too, am
very conflicted, and I appreciate Dr.
Marangell's
point of view. I have anecdotal evidence
from my
389
family background that would make me very
leery of
suggesting to a physician that he or she should
be
over the top and overly concerned to the
extent
that they precluded use of that drug.
But on the other hand, I am
convinced by
the force of some of the psychiatrists
who feel
that this would be beneficial, so I will
vote yes.
DR. GOODMAN: Dr. Chesney.
DR. CHESNEY: Yes, this is a
life-threatening complication in a severe
disease,
and I vote yes.
DR. GOODMAN: Dr. Goodman.
My vote is
yes.
It will make prescribing more difficult.
I
anticipate there will be alarm from
parents and the
child, and I think that is worth that
complication,
because it will raise the threshold to
prescribing
and force an engagement of a discussion,
not only
about the risks, but the potential
benefits and
alternatives to medication.
Dr. Rudorfer.
DR. RUDORFER: I would vote no on the
black box. I believe that while we are concerned
390
about a 2 to 3 percent increase of risk
of
suicidality, I think the underlying
illness carries
a 15 percent risk of suicide if left
untreated, and
I fear that the black box would impede
access to
treatments, and I think the appropriate
warnings
could be conveyed in bolded language that
would be
more likely to both be appreciated by
prescribers
without scaring off patients and families
and
clinicians.
DR. GOODMAN: Bronstein.
MS. BRONSTEIN: I couldn't have said it
any better, just what he said.
DR. GOODMAN: You said yes then?
MS. BRONSTEIN: No, I am saying no.
DR. GOODMAN: I am sorry, you said no.
MS. BRONSTEIN: I am saying no, and the
comments that Dr. Rudorfer has just said,
said
exactly what I wanted to say.
DR. GOODMAN: Dr. Pine.
DR. PINE: I would also vote no, and I
would echo the comments of Dr. Rudorfer
and then
also add that I am particularly concerned
about the
391
paucity of child psychiatrists, and I am
concerned
that the black box might, in particular,
discourage
use by primary care physicians who might
have the
necessary skills and might be the only
physician
available in certain areas, but would be
dissuaded
either from prescribing the agent or
would force
families to travel very far to try to
find a child
psychiatrist.
DR. GOODMAN: Gibbons.
DR. GIBBONS: I am going to vote no
because I am unconvinced from the data at this
point that the risk-benefit ratio is, in
fact,
negative.
DR. GOODMAN: Ebert.
DR. EBERT: No, on the black box warning.
I also have some concerns about the
nature of the
warning with regards to a fine line
between
causality and also the cautions that
would be
expected to be followed.
We have talked about
generalizing this to
all antidepressants, and while I think
that should
be done as far as the warnings and the
cautions, I
392
am not so comfortable with doing that
with regards
to causality.
DR. GOODMAN: It looks like a non-random
distribution of opinions here.
Tana Grady.
DR. GRADY-WELIKY: I am also going to vote
no on the black box and support Drs.
Marangell,
Rudorfer, Pine, and Gibbons' statements.
DR. GOODMAN: Dr. Perrin.
DR. PERRIN: I am going to vote yes for
the black box, take my 30 seconds just to
say that
I hope we will get a few moments to make
some
recommendations to the FDA regarding special
credentialing or certification or
training for
people being able to prescribe any of the
antidepressants for children.
DR. GOODMAN: Dr. Nelson.
DR. NELSON: I am going to vote yes on the
black box, but two comments. I think in this day
and age, a lot of the information we get
about
drugs we pull from Palm-based
databases. What
comes up first is a black box
warning. If it is
393
not there, you don't find it, you don't
see it, you
will go right to dose, you will miss it
entirely.
So, I think that is the only way to get
it out to
people.
The second is I would link that
very
clearly with a discussion of the risk and
benefit
under the pediatric-specific labeling
data, which
would allow, then, a very, you know, the
sort of
two-flavor approach and separating out
fluoxetine
from other drugs, and I would hope that
practitioners who are not child
psychiatrists would
start fluoxetine and then get help if
they needed
it.
Then, the question would be would that deal
with your 15 percent. I don't know, it's an
empirical question.
DR. GOODMAN: Dr. Malone.
DR. MALONE: I would vote yes on the black
box, and I would also encourage that it
include the
efficacy data in the black box.
DR. GOODMAN: Dr. Fost.
DR. FOST: Thirty seconds, five points.
Number one, high standards--
394
DR. GOODMAN: Your vote?
What was your
vote?
DR. FOST:
I am coming to it. Can I start
my 30 seconds now? Number one, high standards of
informed consent however the FDA thinks
they can
best be achieved. Two, Med Guide, which is not
relevant to that as we have heard. Three, yes to
the black box. Four, high standards for
monitoring, and I hope someone will
explain to
someone else what that means. And, fifth, the real
black box, Dr. Temple referred to a black
box that
heightens attention, but the real one, as
previously mentioned, is the one that
conceals what
is going on, which is the black box of
CME, and
that is at the root of the inappropriate
use of
these drugs, and I realize the FDA has
been quite
powerless to do anything about that.
DR. GOODMAN: Dr. Pfeffer.
DR. PFEFFER: I vote yes for the black
box, and I am also concerned that we need
more
information from studies, and I am just
concerned
that while I am voting yes, this may inhibit that.
395
I think that there is such variability
yet in the
population studies and the methodologies
that the
spirit of warning and the spirit of
monitoring, I
highly agree with.
I would just hope that there
would be an
effort yet to study these drugs further.
DR. GOODMAN: Dr. Fant.
DR. FANT: I vote yes on the black box,
and the comment I would like to make is
that if
careful attention is paid to the wording,
I don't
think the black box will have an adverse
effect on
access of potentially useful medications
for kids,
from knowledgeable, thoughtful providers
who
thought certain drugs may be of
benefit. I think
it may have a desired effect on wise
cavalier use
of drugs in an unthoughtful way.
DR. GOODMAN: We have an independent
accounting firm auditing the vote at this
moment.
I am prepared to read it.
This time, we have a total of
23 votes, 15
Yes, 8 No. So, more of a split decision than we
had on our previous votes.
396
We are running nearly out of
time. I
think we have covered really most of what
I hoped
to accomplish in No. 4. We can't subject every
recommendation to a question, I don't
think we can
come up with every possible
recommendation here. I
think we have made tremendous progress in
giving
the FDA a sense of where we stand.
The final Question 5, maybe
just take two
minutes. I think throughout, the meeting
has been
punctuated by discussion about what data
is
missing, what studies need to be done,
and maybe
people can add to what I omit.
Certainly, we need more
efficacy data. We
need safety data in which one of the
intended
endpoints is assessing suicidality, so it
is being
assessed appropriately and prospectively,
and with
sample sizes accordingly, which, of
course, could
represent some problems.
Nevertheless, it needs to be
done. We
need to have long-term data including
comparison
trials with fluoxetine, but also
retaining a
placebo-controlled group. There are
things I could
397
mention, but I think those are some of
the main
clinical trials highlights.
Dr. Marangell, you want to add?
DR. MARANGELL: Any future written
requests, inclusion of suicidality
assessment, and
consistent data dictionary.
DR. GOODMAN: Other comments on future
recommendations on research?
DR. O'FALLON: Maybe even having a group
that would look at suicidality events in
some of
these studies.
DR. GOODMAN: Dr. Newman.
DR. NEWMAN: Everyone has called for a
long-term trial, and I just want to give
one more
reason why that is important. I agree with Dr.
Nelson, who said that there should be
some actual
numbers in the warnings about what the
risks of the
increased suicidality are, but the 2 to 3
percent,
that is an 8 to 12 weeks, and there
doesn't seem to
be evidence that it is tapering off over
time.
We really need to know, you
know, in a
year, is it four times that, and in two
years, is
398
it eight times that, because we don't
know that.
It
is very important that the warning go on there,
but, you know, it is going to be hard to
write that
accurately if someone is going to be on
the
medicine more than three months or two
months, to
know what to tell them.
DR. WELLS: I would like to
recommend that
it would be very beneficial, I think, if
sponsors
were encouraged to provide additional
information
with regard to benefits in order to help
clinicians
make the assessment of benefits versus
risks.
Specifically, if they could
provide, for
instance, pharmacoeconomic benefits to
include cost
effectiveness information and cost
minimization
data, and also humanistic benefits, such
as quality
of life.
DR. GOODMAN: Other suggestions for future
research?
Dr. Perrin.
DR. PERRIN: I think there is a great deal
of value in doing a much better job with
respect to
understanding the sample selection and
sample
399
biases, and what we know about the
samples at the
time of entry. I am not sure that I know exactly
what the sample ought to consist of, but
we ought
to know something about prior history in
much more
detail than we currently do.
We ought to know about the
issue of the
likelihood of bipolar disease in these
kids. We
need to know how accurately, reliably,
and validly
to diagnose of MDD is made in these kids,
and we
need to know something about the social
and
environmental histories that might
influence both
response to treatment and likeliness of
adherence.
I will take one other moment
just to plug
again, I really think that we need to
find a way to
make sure the people who prescribe
antidepressants
know what they are doing. I am a strong proponent
of the fact that we shouldn't allow
anyone to
prescribe just by having a physician's
license.
DR. GOODMAN: Dr Gorman.
DR. GORMAN: I would like to suggest that
the concern about major depressive
disorder in
children is one of such importance to our
country
400
that this discussion not be taking place,
the study
not be taken upon by a pharmaceutical
company, but
the National Institute of Health.
I think that it should be done
in a way
that allows the real world application of
these
medicines to be studied much closer to
the TAD
trial than to the constraints of
randomized,
controlled clinical trials.
DR. GOODMAN: Dr. Pfeffer.
DR. PFEFFER: I would agree with that, but
this is something I wanted to mention for
a while.
It is a little bit out of the box, but
given
funding concerns, and given the potential
for
partnership, I wonder if there is a
feasibility to
consider that drug companies do be
involved in
these studies and that they be involved
in a way
that they might be able to help with said
costs to
the studies with the idea that it is
totally
unrestricted and that, for example, NIH
can be the
group leading this study, with selecting
the
participants, designing the studies, et
cetera.
DR. GOODMAN: Dr. Fant.
401
DR. FANT: One of the things that I have
been struck with in preparing for this
meeting is
really understanding how little we know
about how a
lot of these drugs work, and just the
basic
pharmacology that underlines them.
We know the primary process
that they seem
to perturb, you know, but reading through
the
inserts, they talk about either low or no
affinity
for this receptor or that receptor. Well, low
affinity can mean anything from no
affinity to 25
percent occupancy.
I think more basic research on
the basic
pharmacology of these drugs, the
chemistry, and
having a better understanding at the
pharmacogenetic level of how different
patients may
respond to a given drug.
That involves a lot of, you
know, sort of
moving into the studies outside of the
realm of
what we have been talking about up to
this point,
but I think those will be important to
better
understand what we are seeing here and
perhaps be
applicable to other drugs in the future.
402
DR. GOODMAN: I am going to turn over the
meeting now to Dr. Chesney, who, as you
know, is
the Chair of the Pediatric Advisory
Committee. I
want to ask her help in closing this
meeting.
Concluding Remarks
DR. CHESNEY: Thank you.
The good news is
that I have a number of pages here of
things to say
that have a great historical and
philosophic
context.
I am going to bypass all of that and on
behalf of the Pediatric Advisory Committee,
just
make one comment which Dr. Nelson and Dr.
Fost
brought to my attention.
That is the importance of
having children
and families participate in research,
well
constructed, well designed research,
because in
most cases, the investigator has been
well vetted,
if you will, is well understood his or
her
credentials have to be reviewed. There is very
close monitoring that goes on in very well
constructed and high quality studies, and
we get
important results, and deaths are rare in
very well
constructed, high quality studies.
403
So, they wanted me to pass on
that general
comment.
My only concluding remarks are
in terms of
thanks. I think we would all very much
like to
thank the families who took so much time
to come
and gave us the emotional energy that it
took for
them to relive their tragedies.
Also, to thank the
psychiatrists and the
families who came and explained to us in
great
detail the importance of having drugs
available and
of the many good things that these drugs
have done.
I particularly wanted to thank
the members
of the FDA who have come under such
intense
scrutiny over the last year, but have
maintained
their professionalism and their
integrity, and that
has meant a great deal to all of us.
I also want to thank all of the
members of
the FDA who have organized and executed
this
meeting over the last two days, which has
taken
just an awesome effort in terms of getting
the
materials out to us, getting the
materials out to
everybody else, and having us here in a
very calm,
404
controlled, and extremely thoughtful
environment.
This has been a very intense two days, and
I wanted to thank all of them.
Finally, just to thank Dr.
Rudorfer, who
chaired the February session, and Dr.
Goodman, who
chaired this session, and Anuja Patel,
who has
brought it all together. I think they have just
done a fabulous job of keeping us on
track.
DR. GOODMAN: Hear, hear.
I don't have
much to add. I echo all the comments of my
colleague. I also want to specifically thank the
members of the Psychopharmacologic
Advisory
Committee and, once again, Anuja
Patel. It would
be useful if you could be at my side
always, make
me look as good as you did during this
meeting,
keeping me organized.
It has been a very challenging
two days.
I think we have made a tremendous amount
of
progress.
I anticipate that there could be more
meetings like this, and hopefully, the
next time,
if we are asked to meet, it is after the
emergence
of additional data, particularly on the
side of
405
efficacy.
We didn't take a vote on the
banning. I
felt, in part, that I knew how it was
going to turn
out.
We were not going to vote in favor of
banning.
On the other hand, I think the reason
behind that was going to be based mostly
on
subjective experience, not so much the
data at
hand.
So, I didn't subject it to a vote.
At some point, I would like to
be in the
position where, like we did on some of
the other
issues, is to have sufficient data before
us that
we could make an informed decision and
make hard
choices.
Right now, we are in a position
where the
drugs are out, they are being used. There is a
widespread opinion that they not only
help, but
they actually save lives, but we can't
really, with
the data available to us, make the kind
of informed
decision that I think would make us all
feel
comfortable.
I think some of the problems
that have
emerged, the suicide signal and the way
it
406
appeared, are a symptom of some
disparities between
our clinical practice and our clinical
research
knowledge, and I hope that, over time,
that gap can
be narrowed, so that our research keeps
pace with
the clinical needs and the clinical
practice that
is out there.
I don't know how to suggest a
mechanism to
do that, and I think we have done a good
deal of
damage control, and I think it is
unfortunate that
we didn't have an opportunity to
intercede sooner.
With that, again, I just want
to thank
everybody for the participation, their
attention.
This has been a really outstanding
meeting from my
perspective, a terrific group of panel
members who
have grappled with very difficult
decisions, and
have made my job a great deal easier.
Thank you again. This meeting is
adjourned.
[Whereupon, at 5:00 p.m. the
proceedings
concluded.]
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