The Food and Drug Administration approved Monday the first pill aimed at preventing HIV infections in healthy people who risk contracting the disease through unsafe sex.
The medication, Truvada, is the first drug shown to protect people from becoming infected with HIV, the virus that causes AIDS. It is already used to treat HIV-positive patients.

Comments
At first blush this sounds like a marvelous step in the campaign against HIV / AIDS. My principal question at this point is about potential side effects for HIV-negative individuals who take the drug for preventative purposes on a sustained basis. (The article notes some testing relative to fetuses is on tap, but that's a "collateral" question to mine.)