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Sponsored by: |
National Institute of Allergy and Infectious Diseases (NIAID) |
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Information provided by: | National Institute of Allergy and Infectious Diseases (NIAID) |
ClinicalTrials.gov Identifier: | NCT00000912 |
The purpose of this study is to compare 4 different combinations of anti-HIV drugs and to determine the number of people whose HIV blood levels decrease to 200 copies/ml or less while on the treatment. This study evaluates the safety of these drug combinations, which include an experimental protease inhibitor (PI), amprenavir.
Despite the success that many patients have had with PI treatment regimens, there is still a possibility that patients receiving PIs may continue to have high HIV blood levels. Because of this possibility, alternative drug combinations containing PIs are being studied. It appears that amprenavir, when taken with 3 or 4 other anti-HIV drugs, may be effective in patients with prior PI treatment experience.
Condition | Intervention | Phase |
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HIV Infections |
Drug: Indinavir sulfate Drug: Abacavir sulfate Drug: Amprenavir Drug: Nelfinavir mesylate Drug: Efavirenz Drug: Levocarnitine Drug: Adefovir dipivoxil Drug: Saquinavir |
Phase II |
Study Type: | Interventional |
Study Design: | Treatment, Placebo Control, Safety Study |
Official Title: | A Phase II, Randomized Trial of Amprenavir as Part of Dual Protease Inhibitor Regimens (Placebo-Controlled) in Combination With Abacavir, Efavirenz, and Adefovir Dipivoxil Versus Amprenavir Alone in HIV-Infected Subjects With Prior Exposure to Approved Protease Inhibitors and Loss of Virologic Suppression as Reflected by a Plasma HIV-1 RNA Concentration >= 1,000 Copies/ml |
Estimated Enrollment: | 475 |
A number of studies both within and outside the ACTG have been initiated or are in development to try to address the issue of alternative treatments for patients who either do not achieve or lose virologic control while receiving protease inhibitors (PIs). Amprenavir (APV) is an attractive candidate to investigate as part of salvage regimens because: 1) it has substantial antiretroviral activity; 2) there are preliminary in vitro and in vivo data that suggest that resistance to this agent may be mediated in part by a unique mutation (I50V); and 3) its cross-resistance profile to the approved PIs is uncertain.
Patients are selectively randomized to 1 of 4 study arms based on prior PI experience. Those randomized to Arms A, B, or C receive 2 PIs, 1 of which is amprenavir (APV), and those randomized to Arm D receive a single PI (APV) as part of their treatment regimen, as follows:
Arm A: APV plus saquinavir soft gel capsule (SQVsgc) plus abacavir (ABC) plus efavirenz (EFV) plus adefovir (ADV).
Arm B: APV plus indinavir (IDV) plus ABC plus EFV plus ADV. Arm C: APV plus nelfinavir (NFV) plus ABC plus EFV plus ADV. Arm D: APV plus placebo (NFV, IDV, or SQVsgc) plus ABC plus EFV plus ADV. All patients receive L-carnitine supplementation. All patients receive clinical physical assessments and laboratory testing during study as follows: Weeks 2, 4, and every 4 weeks thereafter. A primary analysis is performed after the last patient has reached 24 weeks. [AS PER AMENDMENT 3/2/00: At that time, all patients are unblinded to their original treatment assignment.] Patients who experience virologic failure are unblinded and may choose 1 of the following 3 options: Continue study medications open-label, permanently discontinue study medications, or selectively continue study medications [AS PER AMENDMENT 3/2/00: from the arm the patient was originally randomized to] and combine with other approved antiretroviral agents. [AS PER AMENDMENT 3/2/00: For patients adding didanosine (ddI) to their regimens, monitoring for the development of pancreatitis is crucial.] Final evaluations are required for those patients who are off drug during the immediate 8-week period following the last dose of study treatment. Beyond 8 weeks, they are followed for incidence of death, cancer, congenital anomalies, and permanent disabilities. [AS PER AMENDMENT 3/2/00: Gilead Sciences has terminated its U.S. development of ADV for HIV infection. Gilead will continue to supply ADV for patients in ACTG 398 until the study closes. Patients who are receiving ADV at the completion of the study may continue to access ADV through the Expanded Access Program, provided that the physician and patient have determined that continued use of ADV is beneficial.]
Ages Eligible for Study: | 13 Years and older |
Genders Eligible for Study: | Both |
Accepts Healthy Volunteers: | No |
Inclusion Criteria
Patients may be eligible for this study if they:
Exclusion Criteria
Patients will not be eligible for this study if they:
Study Chair: | Scott Hammer | |
Study Chair: | John Mellors |
Study ID Numbers: | ACTG 398, Substudy ACTG 5003s |
Study First Received: | November 2, 1999 |
Last Updated: | November 13, 2008 |
ClinicalTrials.gov Identifier: | NCT00000912 |
Health Authority: | United States: Federal Government |
Placebos Drug Therapy, Combination HIV Protease Inhibitors VX 478 |
Anti-HIV Agents Viral Load efavirenz |
Efavirenz Sexually Transmitted Diseases, Viral Indinavir Saquinavir Acquired Immunodeficiency Syndrome Immunologic Deficiency Syndromes Virus Diseases Amprenavir HIV Seropositivity |
HIV Infections Sexually Transmitted Diseases Adefovir dipivoxil Abacavir Nelfinavir Adefovir Retroviridae Infections Carnitine |
Anti-Infective Agents Slow Virus Diseases Molecular Mechanisms of Pharmacological Action Physiological Effects of Drugs Infection Reverse Transcriptase Inhibitors Anti-Bacterial Agents Anti-Retroviral Agents Vitamins Therapeutic Uses Micronutrients Nucleic Acid Synthesis Inhibitors RNA Virus Infections |
HIV Protease Inhibitors Vitamin B Complex Anti-HIV Agents Immune System Diseases Growth Substances Enzyme Inhibitors Antiviral Agents Pharmacologic Actions Protease Inhibitors Antibiotics, Antitubercular Lentivirus Infections Antitubercular Agents |