Elvitegravir, an integrase inhibitor, was licensed in America during 2012 and is now licensed for use in Europe. Interactions with elvitegravir/cobicistat have been added to the website charts and the HIV iChart app - the printable charts will be updated in the next week. Elvitegravir is available only as a fixed dosed combination tablet (Stribild®) with cobicistat, emtricitabine and tenofovir. As emtricitabine and tenofovir are already listed on the charts, the new interactions show the effect of elvitegravir/cobicistat on comedications.