An International, Double Blind, Randomized, Phase III Study to Evaluate the Tolerance, Safety, and Effectiveness of Viramune (Nevirapine) in Preventing Clinical AIDS Progression Events or Death When Used in Combination With Lamivudine (3TC) and Stable (>= 4 Weeks) Background Nucleoside Therapy

Eligible patients will be randomized to treatment with either 1) open-label 3TC twice daily plus Viramune once daily for 2 weeks and then with Viramune twice daily; or 2) open label 3TC twice daily plus Viramune placebo once daily for 2 weeks and then twice daily Viramune. Patients will start Viramune and 3TC on study day 0. Patients will be evaluated for development of AIDS progression events at months 1, 2, 3, and 4, and every 2 months thereafter until 18 months after the last patient is enrolled or 24 months, whichever occurs first.