McKesson Declares Quarterly Dividend October 24, 2008

The Board of Directors of McKesson Corporation (NYSE:MCK) at its meeting today declared a regular dividend of twelve cents per share on the Common Stock, payable on January 2, 2009, to stockholders of record on December 1, 2008.

McKesson Corporation, currently ranked 18th on the FORTUNE 500, is a healthcare services and healthcare information technology company dedicated to helping its customers deliver high-quality healthcare by reducing costs, streamlining processes, and improving the quality and safety of patient care. McKesson is the longest-operating company in healthcare today, marking its 175th anniversary this year. Over the course of its history, McKesson has grown by providing pharmaceutical and medical-surgical supply management across the spectrum of care; healthcare information technology for hospitals, physicians, homecare, and payors; hospital and retail pharmacy automation; and services for manufacturers and payors designed to improve outcomes for patients. For more information, visit www.mckesson.com.