Inclusion Criteria

Patients may be eligible for this study if they:

• Are at least 13 years old (consent of parent or guardian required if under 18).
• Agree to use a proven barrier method of birth control (e.g., spermicide plus condom) during the study period (hormonal birth control will not be accepted), if able to have children.
• Have received less than 4 weeks treatment with any nucleoside reverse transcriptase inhibitor (NRTI) and have never received any nonnucleoside reverse transcriptase inhibitor (NNRT) or protease inhibitor (PI).
• Have a viral load (amount of HIV in the blood) of 5,000 copies/ml or more, or have a positive result at the screening visit.

Exclusion Criteria

Patients will not be eligible for this study if they:

• Abuse drugs or alcohol in a way that would interfere with the study, in the opinion of the doctor. Patients stable on methadone will be considered for participation.
• Have an active/acute CDC Category C event.
• Are unable to absorb or take medicines by mouth.
• Are pregnant or breast-feeding.
• Have a serious medical condition (such as diabetes, heart problem, hepatitis) that might affect the safety of the patient.
• Have had pancreatitis or hepatitis within the last 6 months.
• Have been treated with radiation or chemotherapy within 28 days before the study drug will be taken, or will have the need for these during the study.
• Have taken drugs that affect the immune system (such as corticosteroids, interleukins, interferons) or that have anti-HIV activity (such as hydroxyurea or foscarnet) within 28 days before the study drug will be taken.
• Have received HIV vaccine within 3 months before the study drug will be taken.
• Have received certain other drugs within 28 days before the study drug will be taken, or think that they will be needed during the study.
• Have received experimental treatments.
• Have allergies which might interfere with the study, in the opinion of the doctor.