ONCE - Only Nocturnal Combination Evaluation of Antiretroviral-Experienced HIV 1 Infected Subjects Switching to Atripla

A single tablet regimen (STR) of efavirenz, emtricitabine and tenofovir disoproxil fumarate (tenofovir DF) is the first complete HAART that is offered as one tablet once a day. The individual components of this HAART regimen have demonstrated efficacy and safety in HIV treatment-naive patients and offer simplification that in turn may increase adherence and improve clinical outcomes. This study aims to evaluate the effectiveness (efficacy, safety and tolerability) of a STR simplification strategy in patients on HAART who have achieved viral suppression in a real world clinical setting.