Snippet from the article:
A once-a-day pill has been proven to lower the risk of getting HIV among needle-using drug addicts, just as it does among heterosexual couples and men who have sex with men.
Among 2,400 injecting drug users in Bangkok, those assigned to take a daily dose of an antiviral drug Viread, or tenofovir generically, had half the risk of getting HIV over a four-year period as those who took a placebo pill. Among those who took tenofovir faithfully, there were 74 percent fewer infections.
Results of the long-awaited study, launched eight years ago, are the capstone of an HIV prevention strategy called PrEP, for pre-exposure prophylaxis.
Read the rest — Prevention Pill Cuts HIV Risk For Injecting Drug Users
Read the study abstract at The Lancet.