It’s not a new drug, but Truvada may help stop the spread of HIV, the virus that causes AIDS, and an FDA panel is urging that it be approved for use as a preventative medication. Truvada is currently used as part of a cocktail of drugs to treat HIV, but studies have shown that it can also reduce infection rates. Doctors are hailing the research as a “huge milestone,” saying it could lead to the end of the AIDS epidemic, which has claimed more than 30 million lives worldwide. The FDA is expected to make a decision by June 15.