Dr. Lisa Sterman holds up a Truvada pill at her office in San Francisco on Thursday, May 10, 2012. Sterman prescribes Truvada off-label for about a dozen patients at high risk for developing AIDS. On

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Dr. Lisa Sterman holds up a Truvada pill at her office in San Francisco on Thursday, May 10, 2012. Sterman prescribes Truvada off-label for about a dozen patients at high risk for developing AIDS. On Wednesday, June 12, 2013, U.S. health officials said the drug is an option for preventing infection in people who inject illegal drugs. (AP Photo/Jeff Chiu) less 

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Associated Press
Thu, Jun 13, 2013 12:44 PM EDT