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Elvitegravir (EVG, formerly GS-9137) is a drug used for the treatment of HIV infection. It acts as an integrase inhibitor. It was developed by the pharmaceutical company Gilead Sciences, which licensed EVG from Japan Tobacco in March 2008. The drug gained approval by the U.S. Food and Drug Administration on August 27, 2012 for use in adult patients starting HIV treatment for the first time as part of the fixed dose combination known as Stribild. On September 24, 2014 the FDA approved Elvitegravir (tradename Vitekta) as a single pill formulation.

According to the results of the phase II clinical trial, patients taking once-daily elvitegravir boosted by ritonavir had greater reductions in viral load after 24 weeks compared to individuals randomized to receive a ritonavir-boosted protease inhibitor.

Medical uses
In the United States, elvitegravir can be obtained either as part of the combination pill Stribild or as the single pill formulation Vitekta.

Vitekta is FDA approved to be used for the treatment of HIV-1 infection in adults who have previous treatment experience with antiretroviral therapy. It must be used in combination with a protease inhibitor that is coadministered with ritonavir as well as additional antiretroviral drug(s).

Adverse effects
According to the package insert, the most common side effect of taking Vitekta is diarrhea.