Alexion Pharmaceuticals Invites You to Participate in its First Quarter 2008 Results Conference Call and Web Cast

CHESHIRE, Conn., April 14 /PRNewswire-FirstCall/ -- Alexion Pharmaceuticals, Inc. NASDAQ: ALXN, today announced that the Company will conduct a conference call and audio web cast on Wednesday, April 30, 2008, at 10:00 a.m. Eastern Time (ET), in conjunction with the release of its financial results for the first quarter ended March 31, 2008. Alexion anticipates releasing its financial results at 6:30 a.m. ET on Wednesday, April 30, 2008.

To participate in this conference call, dial 719-325-4776, confirmation code 3348104 shortly before 10:00 a.m. ET. A replay of the call will be available from 1:00 p.m. ET through a limited time thereafter. The replay number is 719-457-0820, confirmation code 3348104. The audio web cast can be accessed at: www.alexionpharm.com.

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