KING OF PRUSSIA, Pa.--(BUSINESS WIRE)--Trevena Inc., a biotechnology company focused on discovery of a new generation of drugs that target G-protein coupled receptors, announced today that BusinessWeek magazine included Trevena in its list of most successful US startup companies of 2008. The complete list of companies is available in the December 19th, 2008 edition of BusinessWeek, and can be found at http://images.businessweek.com/ss/08/12/1217_hottest_startups/1.htm