The ONCEMRK trial is a multicenter, double-blind, randomized, active-controlled study evaluating the safety, efficacy, tolerability and pharmacokinetics of reformulated raltegravir 1200 mg (dosed as two 600 mg tablets) once daily, compared with ISENTRESS 400 mg twice daily, both in combination with once-daily tenofovir/emtricitabine [i.e. Truvada] over 96 weeks. The primary endpoint of the non-inferiority study is the proportion of patients achieving viral suppression [at 48 weeks]…