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Viagra (sildenafil citrate) Information
FDA has new safety information about this drug, please see http://www.fda.gov/cder/consumerinfo/viagra/default.htm
The NAION issue described in the Alert has been addressed in product labeling; please see Drugs@FDA
FDA ALERT [7/2005]:
A small number of men have lost eyesight in
one eye some time after taking Viagra, Cialis, or Levitra. This type
of vision loss is called non-arteritic anterior ischemic optic
neuropathy (NAION). NAION causes a sudden loss of eyesight because
blood flow is blocked to the optic nerve.
We do not know at this time if Viagra, Cialis, or Levitra causes
NAION. NAION also happens in men who do not take these medicines.
People who have a higher chance for NAION include those who:
- have heart disease
- are over 50 years old
- have diabetes
- have high blood pressure
- have high cholesterol
- smoke
- have certain eye problems
FDA has approved new labels for Viagra, Cialis,
and Levitra to include information on possible eyesight loss (NAION).
Stop using Viagra, Cialis, or Levitra if you have a loss in your
eyesight. Get medical help right away.
Background Information
The FDA approved Viagra on March 27, 1998. Viagra is
the first oral pill to treat impotence, a dysfunction that affects millions
of men in the United States. Viagra is manufactured by Pfizer
Pharmaceuticals, New York, NY.
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Date created: July 8, 2005, updated November 14, 2007 |
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