Stribild is a brand name for an HIV treatment antiretroviral pill. This pill contains a mixture of four drugs: Elvitegravir, Cobicistat, Emtricitabine, and Tenofovir disoproxil fumarate, or TDF. The TDF works with the elvitegravir and the emtricitabine to prevent HIV cells already in the body from multiplying and spreading. The cobicistat in Stribild prevents the body from metabolizing the elvitegravir in Stribild. Because Stribild only prevents HIV cells from spreading, it is not a cure for HIV. Rather, it is a treatment that needs to be continued for as long as a patient is at risk of developing HIV. Many of the people who take Stribild work with HIV-infected patients or are in intimate relationships with people who are HIV-positive or who have AIDS. However, the TDF medication used in Stribild is very toxic. And has to be taken in high doses because not much of it is absorbed in the body.