Patients will visit the clinic at entry and at Weeks 4, 8, 12, 18, 24, 32, 40, and 48. Patients may be asked to come to the clinic at Weeks 14 and 20 to receive additional study drug. Patients must fast for 8 to 12 hours before the screening visit and before each study visit in which blood will be drawn. Blood will be drawn throughout the study for fat, sugar, and insulin tests and for CD4 and CD8 cell counts.