About Tru­vada

Los Angeles Times - - CALIFORNIA - Source: U.S. Cen­ters for Dis­ease Con­trol and Pre­ven­tion

What is it? A pill taken daily that com­bines teno­fovir and emtric­itabine, drugs that have been part of the cock­tail taken by HIV pa­tients for years.

How does it work? The drugs block an en­zyme called re­verse tran­scrip­tase that al­lows HIV cells to mul­ti­ply.

Who should take it? Peo­ple who are HIV-neg­a­tive but risk in­fec­tion. Mostly men who have sex with men, but also in­tra­venous drug users who share equip­ment.

How ef­fec­tive is it? Up to 92%, although doc­tors say pa­tients should still use con­doms.

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