Patients receive open-label APV plus at least 2 other antiretroviral drugs. Fasting blood samples and patient medication adherence questionnaires are collected at Weeks 12 and 24. Bodily assessments are collected at Day 1 and Weeks 12 and 24. Hematology, serum chemistry, plasma HIV-1 viral load determination and CD4+ cell count measurements are collected at pre-entry and every 12 weeks for the duration of the study.