Gilead Said PrEP To Prevent HIV Was 'Not A Commercial Opportunity.' Now It's Running Ads For It

“I’m on the pill,” declares a transgender woman in an up-close shot featured in Gilead Science’s latest drug commercial. “But it’s not birth control,” says a young guy, with a smile, in another scene. The actors are touting Truvada, the only drug approved to prevent the transmission of HIV.