A Phase II, 24-Week, Open-Label Study Designed to Evaluate the Safety, Tolerability, and Efficacy of Novel Quadruple-Combination Therapy With Preveon (Adefovir Dipivoxil; Bis-POM PMEA), Abacavir (1592U89), Sustiva (Efavirenz; DMP-266), and Amprenavir (141W94) for the Treatment of HIV-1 Infection in Patients Who Have Failed Previous Protease Inhibitor Treatment

Patients receive a treatment regimen of adefovir dipivoxil, abacavir, efavirenz, and amprenavir for 24 weeks. During the study, patients are evaluated for changes from baseline in plasma HIV-1 RNA levels and lymphocyte subsets and for development of adverse events and toxicities. Patients who experience virologic failure are discontinued from the study. After Week 24, patients with documented virologic response are eligible to continue receiving the study treatment and to attend scheduled follow-up visits.