A Double-Blind, Randomized, Dose Response Study of Three Doses of Delavirdine Mesylate (U-90152S) in Combination With Zidovudine (ZDV) Versus ZDV Alone in HIV-1 Infected Individuals With CD4 Counts of 200-500mm3

PART I: Patients are originally randomized to receive ZDV plus DLV (DLV at 1 of 3 doses) or ZDV plus placebo. AS PER AMENDMENT 3/7/96: PART II: Patients are rerandomized from PART I. Arm I: ZDV plus 3TC plus placebo. Arm II: ZDV plus 3TC plus DLV. Arm III: ZDV plus DLV (DLV at a higher dose than in the original protocol). Arm IV: ZDV plus DLV (no change from original; same treatment as Arm III). AS PER AMENDMENT 1/24/97: Approximately 450 more patients will be enrolled in one of these 3 revised arms on PART II. Half of these new patients will be anti-retroviral naive and half will be anti-retroviral experienced.