An Open-Label, Pilot Study to Evaluate the Development of Resistance to Nevirapine (BI-RG-587) in HIV-Infected Patients With CD4 Cell Count >= 500/mm3

Primary: To evaluate the rate of development of resistance to nevirapine in HIV-1 infected individuals. To evaluate safety of nevirapine in HIV-1 infected individuals with CD4 counts greater than or equal to 500 cells/mm3. Secondary: To evaluate the effect of nevirapine on surrogate markers. The anti-HIV agent nevirapine is associated with rapid emergence of resistance when administered alone or in combination with zidovudine to HIV-infected patients with CD4 counts \<= 400 cells/mm3. In persons with less advanced HIV disease and less viral burden, the emergence of resistance may be delayed, thus permitting evaluation for beneficial effect in a population where there is currently no established therapy.