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EXHIBIT 23.1
CONSENT OF INDEPENDENT AUDITORS
We consent to the reference to our firm under the caption "Experts"
in the Registration Statement (Form S-4) and related Prospectus of Millennium
Pharmaceuticals, Inc. for the registration of $500,000,000 of its common
stock and to the incorporation by reference therein of our report dated
January 27, 2000 with respect to the consolidated financial statements of
Millennium Pharmaceuticals, Inc. included in its Annual Report (Form 10-K)
for the year ended December 31, 1999, filed with the Securities and Exchange
Commission.
/s/ Ernst & Young LLP
Boston, Massachusetts
July 28, 2000
