WATERTOWN, Mass.--(BUSINESS WIRE)--Panacos Pharmaceuticals, Inc. (NASDAQ: PANC), today announced the Company’s Chief Medical Officer, Scott McCallister, and the Vice President of Manufacturing Operations, John Richards, will leave Panacos on February 13, 2009. These positions were eliminated after Panacos sold bevirimat, and the Company has refocused its efforts on its early stage programs. Dr. McCallister has served in this capacity since October 2006, and Dr. Richards joined the Company in February 2006.