2008-04-17 23:49:30 -

www.mckesson.com - McKesson Corporation (NYSE:MCK) will release financial results for its fourth fiscal quarter ended March 31, 2008 on Monday, May 5, 2008 following the close of markets at approximately 4:00 PM Eastern Time (1:00 PM Pacific Time). The company has scheduled a conference call for 5:00 PM Eastern Time (2:00 PM Pacific Time), during which John

Hammergren, chairman and chief executive officer, and Jeff Campbell, executive vice president and chief financial officer, will review these results.

The dial-in number for individuals wishing to participate on the call is (210) 234-0000. Ana Schrank, vice president, Investor Relations, is the leader of the call, and the password to join the call is "McKesson." A playback of the call will be available through May 21, 2008 by calling (866) 487-7574. The conference call will also be broadcast live over the Internet and can be accessed by all interested parties at www.mckesson.com.

McKesson Corporation, currently ranked 18th on the FORTUNE 500, is a healthcare services and 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, and in 2008 marks 175 years of continuous operations. 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.

McKesson Corporation
Ana Schrank, 415-983-7153
Vice President, Investor Relations