Attached files

file filename
10-K - FORM 10-K - MEDICINES CO /DEy83232e10vk.htm
EX-2.3 - MEDICINES CO /DEy83232exv2w3.htm
EX-31.2 - EX-31.2 - MEDICINES CO /DEy83232exv31w2.htm
EX-21 - EX-21 - MEDICINES CO /DEy83232exv21.htm
EX-32.1 - EX-32.1 - MEDICINES CO /DEy83232exv32w1.htm
EX-32.2 - EX-32.2 - MEDICINES CO /DEy83232exv32w2.htm
EX-31.1 - EX-31.1 - MEDICINES CO /DEy83232exv31w1.htm
EX-10.42 - EX-10.42 - MEDICINES CO /DEy83232exv10w42.htm
EX-10.41 - EX-10.41 - MEDICINES CO /DEy83232exv10w41.htm
Exhibit 23
Consent of Independent Registered Public Accounting Firm
We consent to the incorporation by reference in the Registration Statements (Forms S-8 No. 333-44884, 333-74612, 333-98191, 333-116295, 333-135460, 333-135461, 333-148602, 333-152105, 333-157499, 333-161672) pertaining to the 1998 Stock Incentive Plan, the 2000 Outside Director Stock Option Plan, the 2000 Employee Stock Purchase Plan, the 2001 Non-Officer, Non-Director Employee Stock Incentive Plan, the 2004 Stock Incentive Plan, the 2007 Equity Inducement Plan and the 2009 Equity Inducement Plan of The Medicines Company and Registration Statement (Form S-3 No. 333-139987) of our reports dated March 16, 2010 with respect to the consolidated financial statements and schedule of The Medicines Company and the effectiveness of internal control over financial reporting of The Medicines Company included in this Annual Report (Form 10-K) for the year ended December 31, 2009.
/s/ Ernst & Young LLP
MetroPark, NJ
March 16, 2010