SC-49483 has no inherent activity against HIV-1 but is converted in the intestinal wall to SC-48334, which has demonstrated anti-HIV activity. Since SC-49483 causes significantly less gastrointestinal toxicity than SC-48334, the combination of SC-49483 with AZT may improve the benefits of both drugs in patients with HIV infection.~Patients are randomized to receive AZT alone or in combination with one of two doses of SC-49483, administered three times daily. Treatment continues for 16 to 24 weeks. Per 07/19/94 amendment: At the end of 24 weeks, blinded treatment continues for an additional 4 weeks, at which time patients may receive open-label drug on an optional basis for 90 days.
To determine the safety and anti-HIV activity of two doses of SC-49483 in combination with zidovudine (AZT) versus AZT alone. To determine the influences of viral phenotype on the anti-HIV activity of these treatment regimens.~SC-49483 has no inherent activity against HIV-1 but is converted in the intestinal wall to SC-48334, which has demonstrated anti-HIV activity. Since SC-49483 causes significantly less gastrointestinal toxicity than SC-48334, the combination of SC-49483 with AZT may improve the benefits of both drugs in patients with HIV infection.