A Study to Compare Three Doses of T-20 When Given in Combination With Abacavir, Amprenavir, Ritonavir, and Efavirenz to HIV-Infected Adults

Roche logo


Status and phase

Phase 2


HIV Infections


Drug: Efavirenz
Drug: Enfuvirtide
Drug: Abacavir sulfate
Drug: Amprenavir
Drug: Ritonavir

Study type


Funder types




Details and patient eligibility


The purpose of this study is to see if it is safe and effective to give T-20, a new type of anti-HIV drug, with a combination of other anti-HIV drugs. The other anti-HIV drugs used are abacavir (ABC), amprenavir (APV), ritonavir (RTV), and efavirenz (EFV). Three different doses of T-20 are tested.

Full description

Patients are assigned to one of four groups. Three dose groups receive a background antiretroviral regimen (ABC, APV, RTV, and EFV) and T-20, which is given at one of three doses on a twice-daily regimen. The fourth group (control) receives the background antiretroviral regimen alone. For each treatment group, 17 patients are enrolled. Treatment is administered for 16 weeks, followed by a 32-week treatment extension, and a 2-week follow-up period. The following are assessed throughout the trial: safety parameters (as measured by hematology, clinical chemistry, urinalysis, and treatment-emergent adverse events); virologic and immunologic activity; phenotypic and genotypic resistance; T-20 plasma levels; and pharmacokinetics of T-20 and oral antiretrovirals. The total study duration is 1 year.




18+ years old


No Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria

Patients may be eligible for this study if they:

  • Are HIV-positive.
  • Have an HIV level (viral load) between 400 and 100,000 copies/ml at the screening visit.
  • Have taken at least 1 PI (protease inhibitor) for at least 16 weeks, and have had no interruptions in their most recent PI-containing anti-HIV drug regimen.
  • Are at least 18 years old.
  • Agree to abstinence or use of 2 effective methods of birth control, including a barrier method, during the study.

Exclusion Criteria

Patients will not be eligible for this study if they:

  • Have ever taken an NNRTI (nonnucleoside reverse transcriptase inhibitor).
  • Have an opportunistic (HIV-related) infection.
  • Have had an unexplained fever of at least 38.5 C for 7 days in a row within 30 days prior to screening.
  • Have had diarrhea lasting at least 15 days within 30 days prior to screening.
  • Have ever taken abacavir, amprenavir, or efavirenz (ABC, APV, or EFV).
  • Have certain genetic characteristics (drug resistance mutations) that could change the way a drug acts in the body.
  • Are allergic to any of the study medications.
  • Have a tumor other than certain skin or cervical cancers.
  • Are on chemotherapy that cannot be discontinued during the study.
  • Are taking an investigational drug within 30 days prior to screening.
  • Have ever received an HIV vaccine.
  • Are taking certain medications.
  • Abuse drugs or alcohol.
  • Have hemophilia or another blood clotting disorder.
  • Have had an organ transplant.
  • Are pregnant or breast-feeding.

Trial contacts and locations



Data sourced from clinicaltrials.gov

Clinical trials

Find clinical trialsTrials by location


© Copyright 2024 Veeva Systems