Elvitegravir/Cobicistat/Emtricitabine/Tenofovir Disoproxil Fumarate Single Tablet for HIV-1 Infection Treatment

OBJECTIVE: To review the clinical trials, pharmacologic characteristics, safety, and efficacy of the elvitegravir/cobicistat/emtricitabine/tenofovir single tablet formulation (Stribild). DATA SOURCES: Literature searches were performed in MEDLINE (1948-September 2012) and PubMed (1966-September 2012) using the search terms GS-9137, elvitegravir, GS 9350, cobicistat, quad pill, Stribild, and integrase inhibitors. Abstracts from HIV/AIDS conferences were reviewed. STUDY SELECTION AND DATA EXTRACTION: Phase 3 studies evaluating the safety and efficacy of Stribild were preferentially evaluated, as well as relevant references from the published studies. DATA SYNTHESIS: Stribild contains complete antiretroviral therapy for HIV-1 infection in a single tablet. It is the first once-daily therapy option available with an integrase inhibitor and a novel pharmacokinetic boosting agent. Stribild has shown non-inferiority in viral load suppression at 48 weeks when compared with dual nucleoside/nucleotide reverse transcriptase inhibitor and either a ritonavir-boosted protease inhibitor or nonnucleoside reverse transcriptase inhibitor regimen. Stribild was well tolerated, but some patients experienced increases in serum creatinine early in treatment that stabilized over time. CONCLUSIONS: Stribild is the first single-tablet regimen for HIV-1 infection treatment containing an integrase inhibitor. It is expected to have a prominent place in the formularies of health plans providing care for individuals with HIV-1 infection.