Pill taken before, after sex may prevent HIV

An HIV prevention pill, called Truvada, taken by gay men before and after sex reduced the risk of virus transmission by 86 percent, according to the results of a clinical trialAn HIV prevention pill taken by gay men before and after sex reduced the risk of virus transmission by 86 percent, according to the results of a clinical trial released Tuesday. Truvada contains HIV treatment drugs tenofovir and emtricitabine, and is made by Gilead Sciences in California. While the latest evidence on the technique known as pre-exposure prophylaxis, or PrEP, is not enough to change guidelines, it was welcomed as a novel approach to HIV prevention. The study "provides the first evidence that an event-driven regimen is effective among high-risk MSM (men who have sex with men) with frequent sex," said Jonathan Mermin, director of the US Centers for Disease Control and Prevention's National Center for HIV/AIDS.



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