A Phase IIIB Open-Label Trial Replacing Saquinavir HGC (Ro 31-8959) With Saquinavir SGC (Ro 31-8959) in Combination With Other Antiretroviral Drugs in Patients With HIV-1 Infection

Eligible patients will be stratified by HIV-1 RNA level into 2 populations: 1) >= 5,000-30,000 HIV-1 RNA, 2) > 30,000 HIV-1 RNA. All patients will be randomized to 1 of 3 treatment arms: Arm A - Saquinavir soft gel capsules (SQV SGC) + 2 new nucleoside analogs (reverse transcriptase inhibitors [RTIs]), Arm B - SQV SGC + nelfinavir + stavudine (d4T) or a new RTI, or Arm C - SQV SGC + ritonavir + d4T or a new RTI. All patients will undergo plasma HIV-1 RNA determinations, CD4 lymphocyte counts, hematology and chemistry blood work at baseline, weeks 4, 8, 12, 16 and 24.