Effects of Ribavirin on Zidovudine or Stavudine
|First Submitted Date||July 26, 2001|
|First Posted Date||August 31, 2001|
|Last Update Posted Date||May 19, 2015|
|Start Date||Not Provided|
|Primary Completion Date||Not Provided|
|Current Primary Outcome Measures||Not Provided|
|Original Primary Outcome Measures||Not Provided|
|Change History||Complete list of historical versions of study NCT00021632 on ClinicalTrials.gov Archive Site|
|Current Secondary Outcome Measures||Not Provided|
|Original Secondary Outcome Measures||Not Provided|
|Current Other Outcome Measures||Not Provided|
|Original Other Outcome Measures||Not Provided|
|Brief Title||Effects of Ribavirin on Zidovudine or Stavudine|
|Official Title||Pharmacokinetic Evaluation of the Effects of Ribavirin (RBV) on Zidovudine (ZDV) or Stavudine (d4T) Triphosphate (TP) Formation|
The purpose of this study is to see how treatment of hepatitis C (HCV) patients with ribavirin (RBV) affects the anti-HIV drugs stavudine (d4T) or zidovudine (ZDV).
Studies have shown that RBV may interfere with the action of ZDV and d4T. There is little information about the way these drugs interact in the body. This study will examine how the drug RBV affects levels of ZDV or d4T in patients who are currently on stable anti-HIV therapy.
RBV, a nucleoside analogue, is used for the treatment of hepatitis C virus (HCV) in alliance with interferon-alfa 2a/2b in patients with HIV-1. The mechanism of action of RBV has led to in vitro studies examining the agonism/antagonism in efficacy occurring when used in combination with nucleoside reverse transcriptase inhibitors (NRTIs). The primary objective of the pharmacology component of this current study will be the evaluation of the effect of RBV on the intracellular activation of ZDV or d4T owing to the reported antagonism observed in vitro.
Pharmacokinetic (PK) evaluations for plasma ZDV or d4T and intracellular ZDV or d4T and measurements of their triphosphate anabolites are performed before initial RBV dosing (within 2 weeks of visit) and 8 weeks after RBV administration. Thymidine triphosphate (TTP) concentrations also are quantitated to permit estimation of the ratio of active drug to endogenous triphosphate concentrations.
For entry, prior to RBV dosing, blood samples are collected within 2 hours prior to the ZDV or d4T dose and then at Hours 1, 4, and 8 post dosing. Following the entry PK blood draws, patients initiate RBV treatment within 2 weeks of the first PK study day.
For the Week 8 evaluation (measured as 8 weeks following initiation of RBV), blood samples are collected prior to the ZDV or d4T dose and then at Hours 1, 4, and 8 post dosing.
|Study Design||Not Provided|
|Target Follow-Up Duration||Not Provided|
|Sampling Method||Not Provided|
|Study Population||Not Provided|
|Study Groups/Cohorts||Not Provided|
|Publications *||Aweeka FT, Kang M, Yu JY, Lizak P, Alston B, Chung RT; AIDS Clinical Trials Group 5092s Study Team. Pharmacokinetic evaluation of the effects of ribavirin on zidovudine triphosphate formation: ACTG 5092s Study Team. HIV Med. 2007 Jul;8(5):288-94. Erratum in: HIV Med. 2007 Sep;8(6):412.|
* Includes publications given by the data provider as well as publications identified by ClinicalTrials.gov Identifier (NCT Number) in Medline.
|Completion Date||Not Provided|
|Primary Completion Date||Not Provided|
Patients may be eligible for this study if they:
Patients will not be eligible for this study if they:
|Ages||13 Years and older (Child, Adult, Senior)|
|Accepts Healthy Volunteers||No|
|Contacts||Contact information is only displayed when the study is recruiting subjects|
|Listed Location Countries||United States|
|Removed Location Countries|
|Other Study ID Numbers||ACTG A5092s
10919 ( Registry Identifier: DAIDS-ES )
|Has Data Monitoring Committee||Not Provided|
|U.S. FDA-regulated Product||Not Provided|
|IPD Sharing Statement||Not Provided|
|Responsible Party||National Institute of Allergy and Infectious Diseases (NIAID)|
|Study Sponsor||National Institute of Allergy and Infectious Diseases (NIAID)|
|PRS Account||National Institute of Allergy and Infectious Diseases (NIAID)|
|Verification Date||July 2013|