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Sponsored by: |
National Institute of Allergy and Infectious Diseases (NIAID) |
Information provided by: | National Institute of Allergy and Infectious Diseases (NIAID) |
ClinicalTrials.gov Identifier: | NCT00000629 |
Primary objective: To study the pharmacokinetic interaction between zidovudine (AZT) and valproic acid in asymptomatic HIV-infected patients, characterizing AZT's oral bioavailability, plasma elimination half-time, plasma levels, and urinary excretion of AZT, 5'-O-glucuronide (GAZT), and 3'-amino-3'-deoxythymidine (AMT). Secondary objective: To establish the safety of short-term administration of AZT and valproic acid in combination with regard to hematologic parameters and liver function in asymptomatic HIV-infected patients.
Preliminary studies using human liver tissue have shown that valproic acid inhibits the metabolic inactivation of zidovudine (AZT), which may prolong the plasma half-life of AZT and thus prolong the duration of the drug's effects in the body.
Condition | Intervention | Phase |
HIV Infections |
Drug: Valproic acid Drug: Zidovudine |
Phase I |
MedlinePlus related topics: | AIDS |
Drug Information available for: | Zidovudine Divalproex sodium Valproate Sodium Valproic acid |
Study Type: | Interventional |
Study Design: | Treatment, Open Label, Pharmacokinetics Study |
Official Title: | The Effects of Valproic Acid on Zidovudine Glucuronidation and Pharmacokinetics in HIV-Infected Patients. |
Estimated Enrollment: | 6 |
Preliminary studies using human liver tissue have shown that valproic acid inhibits the metabolic inactivation of zidovudine (AZT), which may prolong the plasma half-life of AZT and thus prolong the duration of the drug's effects in the body.
Six asymptomatic HIV-infected patients are treated with AZT orally every 8 hours on days 1 through 4, then with a single dose on day 5 (after 8 hours of fasting), followed by pharmacokinetic sampling. On days 6 through 9, patients receive AZT orally every 8 hours in combination with valproic acid (lowest dose in the first 5 patients and a higher dose in patients 6 and 7) orally every 8 hours. On day 10, AZT and 1 of the 2 doses of valproic acid are given orally as single doses, followed by pharmacokinetic sampling. AZT is continued alone orally every 8 hours on days 11 through 14, then resumed at the patient's usual dose beginning on day 15. Per 03/09/92 amendment, dosing schedule may be modified slightly to accommodate patients with scheduling conflicts.
Ages Eligible for Study: | 18 Years to 50 Years |
Genders Eligible for Study: | Male |
Accepts Healthy Volunteers: | No |
Inclusion Criteria
Concurrent Medication:
Allowed:
Vitamins if already being taken prior to start of therapy.
Patients must have:
Prior Medication:
Required:
Allowed:
Exclusion Criteria
Co-existing Condition:
Patients with the following symptoms or conditions are excluded:
Concurrent Medication:
Excluded:
Patients with the following prior conditions are excluded:
Prior Medication:
Excluded:
Click here for more information about Zidovudine 
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Lertora J, Akula S, Greenspan D, Rege A, Agrawal K, George W, Hyslop N. Valproic acid inhibits zidovudine glucuronidation in patients with HIV infection. Int Conf AIDS. 1992 Jul 19-24;8(3):100 (abstract no PuB 7307)
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Lertora JJ, Rege AB, Greenspan DL, Akula S, George WJ, Hyslop NE Jr, Agrawal KC. Pharmacokinetic interaction between zidovudine and valproic acid in patients infected with human immunodeficiency virus. Clin Pharmacol Ther. 1994 Sep;56(3):272-8.
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Study ID Numbers: | ACTG 191 |
First Received: | November 2, 1999 |
Last Updated: | July 29, 2008 |
ClinicalTrials.gov Identifier: | NCT00000629 |
Health Authority: | United States: Federal Government |
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