A Study to Compare the Effectiveness of Two Anti-HIV Drug Combinations

Inclusion Criteria You may be eligible for this study if you: * Are HIV positive. * Have a viral load (level of HIV in your blood) of at least 10,000 copies/ml within 45 days of study entry. * Have a CD4 cell count of at least 100 cells/mm3 within 45 days of study entry. * Have a normal chest X-ray. * Have never taken protease inhibitors or 3TC. * Are 16 years of age or older. * Agree to practice sexual abstinence or use barrier methods of birth control (e.g., condoms). Exclusion Criteria You will not be eligible for this study if you: * Have an active opportunistic (AIDS-related) infection or cancer. * Have certain types of Kaposi's sarcoma. * Have hepatitis. * Have chronic diarrhea. * Have a history of certain medical conditions. * Are allergic to any of the study medications. * Are taking certain medications. * Are pregnant or breast-feeding.