Second-line Treatment of HIV-1 With Ritonavir Boosted Atazanavir or Darunavir With an Optimized NRTI Backbone

Capsule, Oral, 300 mg, Once daily (QD), 48 weeks

Oral, Two 400 mg Tablets, Once daily (QD), 48 weeks

Tablet, Oral, 100 mg, Once daily (QD), 48 weeks

"tablet/capsule, Noninvestigational products i.e. NRTI backbone will be administered according to their respective package inserts for 48 weeks~NRTI backbone are:~\- Abacavir (300 mg), Tenofovir (300 mg), Didanosine (250 mg or 400 mg), Stavudine (30 mg or 40 mg), Emtricitabine (200 mg), Lamivudine (300 mg), Zidovudine (300 mg), EPZICOM® (600 mg Ziagen® + 300 mg Lamivudine), COMBIVIR® (150 mg Lamivudine + 300 mg Zidovudine)~The following NRTI combinations are prohibited in this study:~* Didanosine + Stavudine~* Zidovudine + Stavudine~* Lamivudine + Emtricitabine"