COVINGTON, Ky.--(BUSINESS WIRE)--Omnicare, Inc. (NYSE: OCR), the nation's leading provider of pharmaceutical care for the elderly, today announced that Patrick E. Keefe, Executive Vice President and Chief Operating Officer, plans to retire after 26 years with the Company, effective June 29, 2010. Jeffrey M. Stamps, Senior Vice President – Pharmacy Operations for Omnicare, will assume Mr. Keefe’s responsibilities on an interim basis until a permanent successor is named. Following his retirement, Mr. Keefe will continue to serve the Company as a consultant.