Bristol-Myers resolves outstanding U.S. litigation on efavirenz Bristol-Myers Squibb Company says it has "successfully resolved all outstanding U.S. patent litigation relating to efavirenz, an active ingredient contained in our Sustiva -- efavirenz -- and Atripla products. Accordingly, we believe that loss of exclusivity in the U.S. for efavirenz should not occur until December 2017. Bristol-Myers Squibb remains committed to delivering our medicines and to developing new and innovative treatments to help patients prevail over serious disease. Atripla is currently the #1 prescribed U.S. regimen in its category, with over 8 million prescriptions written since its launch in 2006. Earlier this year the company submitted a new drug application to the U.S. Food and Drug Administration for a fixed-dose combination of atazanavir sulfate and cobicistat, an investigational pharmacokinetic enhancer. In addition, studies are ongoing for new treatments including an HIV-1 attachment inhibitor, an HIV-1 maturation inhibitor and an anti-PD-L1. The establishment of intellectual property rights allows Bristol-Myers Squibb to discover, develop and deliver innovative medicines that help patients prevail over serious diseases. We will continue to defend our intellectual property rights against infringement as we remain focused on providing a deep and broad portfolio of innovative medicines to patients around the world."