High Dose Ritonavir/Lopinavir Liquid Formulation in Salvage Therapy for Protease Inhibitor Resistant HIV Disease

The purpose of this study is to evaluate the safety, tolerability and efficacy of higher doses of lopinavir/ritonavir, in combination with other anti-HIV medications when administered as either the capsule or liquid formulations, among patients who have not had full viral suppression despite treatment with 3 classes of HIV medications, and at least 2 prior courses of treatment with HIV protease inhibitors. In addition, pharmacokinetics of the active agents, lopinavir and ritonavir will be measured following administration of both the liquid and capsule formulations and compared.