Press Releases
May 17, 2007

Alexion to Present at Citigroup's Global Healthcare Conference

CHESHIRE, Conn., May 17, 2007 /PRNewswire-FirstCall via COMTEX News Network/ -- Alexion Pharmaceuticals, Inc. (Nasdaq: ALXN) today announced that Dr. Leonard Bell, Chief Executive Officer of Alexion Pharmaceuticals, will present at Citigroup's Global Healthcare Conference in New York City at 10:30 a.m. ET on Thursday, May 24, 2007.

An audio webcast of Dr. Bell's remarks will be available live. You can access the webcast at: http://www.alexionpharm.com. An archived version of the remarks will also be available through the Company's web site for a limited time following the conference.

SOURCE Alexion Pharmaceuticals, Inc.

Leonard Bell, M.D., Chief Executive Officer of Alexion Pharmaceuticals, Inc.,
+1-203-272-2596; or Media, David Patti of Makovsky + Company, +1-212-508-9623; or
Investors, Rhonda Chiger of Rx Communications, +1-917-322-2569, both for Alexion
Pharmaceuticals, Inc.
http://www.alexionpharm.com

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