Shareholder Class Action Update By Abbey, Gardy & Squitieri, LLP

Business Wire, April 30, 1999

NEW YORK--(BUSINESS WIRE)--April 30, 1999--

The following was released today by Abbey, Gardy & Squitieri, LLP:

Notice is hereby given to:

- All purchasers of McKesson Corp. or McKesson HBOC Inc. securities

between October 18, 1999 and April 27, 1999;

- All purchasers of HBO & Company securities between April 14, 1998

and January 12, 1999;

- All investors whose HBO & Company stock was exchanged for

McKesson HBOC Inc. stock pursuant to the January 12, 1999 merger.

You are hereby notified that a securities fraud class action lawsuit has been commenced in U.S. District Court in San Francisco against McKesson HBOC Inc. (NYSE: MCK) and certain of its officers and directors.

If you are a member of the class described above, you may, not later than June 28, 1999, move the court to serve as a lead plaintiff of a class action seeking to recover monetary damages on behalf of all similarly-situated investors, excluding the defendants and their affiliates.

If you wish to discuss this action, or would like to request a copy of the complaint filed, please CONTACT:

Mark C. Gardy, Esq.

Nancy Kaboolian, Esq.

James S. Notis, Esq.

Abbey, Gardy & Squitieri, LLP

212 East 39th Street

New York, New York 10016

TELEPHONE: (800) 889-3701 or (212) 889-3700

FAX: (212) 684-5191

E-MAIL: nkaboolian@a-g-s.com

-or-

James Jay Seirmarco, Esq.

Abbey, Gardy & Squitieri, LLP

595 Market Street, Suite 2500

San Francisco, California 94105

TELEPHONE: (415) 538-3725

FAX: (415) 538-3775

E-MAIL: jseirmarco@a-g-s.com