Exhibit 23.1
[LETTERHEAD OF PRICEWATERHOUSECOOPERS LLP]
CONSENT OF INDEPENDENT AUDITORS
We hereby consent to the incorporation by reference in this Registration Statement on Form S-8 of our report dated October 18, 2002 relating to the consolidated financial statements of Alexion Pharmaceuticals, Inc. which appears in Alexion Pharmaceuticals, Inc.’s Annual Report on Form 10-K for the year ended July 31, 2002.
/s/ PricewaterhouseCoopers LLP
Hartford, Connecticut
July 3, 2003