BACKGROUND: Cobicistat (COBI) is a pharmacoenhancer with no antiretroviral activity. METHODS: International, randomized double-blind active-controlled trial to evaluate the efficacy and safety of COBI vs ritonavir (RTV) as a pharmacoenhancer of atazanavir in combination with emtricitabine/tenofovir disoproxil fumarate in HIV treatment-naive patients followed through week 144. RESULTS: At Week 144, virologic suppression was achieved in 72% (COBI) and 74% (RTV) of patients. Adverse events leading to study drug discontinuation occurred in 11% of patients in each group. Median changes in serum creatinine (mg/dL) were +0.13 (COBI) and +0.07 (RTV) and were unchanged from week 48. CONCLUSIONS: Once-daily COBI is a safe and effective pharmacoenhancer of the protease inhibitor atazanavir.
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Gallant et al. (2015) studied this question.
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