SAN DIEGO--(BUSINESS WIRE)--Optimer Pharmaceuticals, Inc. (NASDAQ:OPTR) today announced the appointments of Francois-Xavier Frapaise, M.D., as Senior Vice President and Chief Scientific Officer and Peter E. Grebow, Ph.D., to the company’s Board of Directors. Dr. Frapaise will lead all clinical and pre-clinical drug discovery programs, as well as any post-marketing studies. Dr. Grebow brings to the Board of Directors a wealth of experience in worldwide business development, pharmaceutical manufacturing and drug development.