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First-line therapy for HIV infection usually consists of two nucleoside reverse-transcriptase inhibitors (NRTIs) plus either the nonnucleoside reverse-transcriptase inhibitor (NNRTI) efavirenz or a ritonavir-boosted protease inhibitor (PI) such as lopinavir/ritonavir. Which of these two initial regimens is better? Also, NRTIs have been associated with toxicities such as lipodystrophy. Are regimens that do not include NRTIs as effective as ones that do? To answer these important questions, investigators randomized 757 HIV-infected, treatment-naive patients to receive one of three regimens: efavirenz plus two NRTIs (EFV group), lopinavir/ritonavir plus two NRTIs (LPV group), or lopinavir/ritonavir plus efavirenz (NRTI-sparing group).
The rate …