Ironwood Pharmaceuticals to Host First Quarter 2011 Investor Update Call

May 5, 2011

CAMBRIDGE, Mass.--(BUSINESS WIRE)-- Ironwood Pharmaceuticals, Inc. (NASDAQ: IRWD) today announced it will host its first quarter 2011 investor update conference call and webcast at 8:30 a.m. Eastern Time on Thursday, May 12, 2011. Individuals interested in participating in the call should dial (888) 820-9416 (U.S. and Canada) or (913) 312-1416 (international) using conference ID number 1229502. To access the webcast, please visit the Investors section of Ironwood's website at www.ironwoodpharma.com at least 15 minutes prior to the start of the call to ensure adequate time for any software downloads that may be required.

The call will be available for replay via telephone starting May 12, 2011, at approximately 11:30 a.m. Eastern Time, running through 11:59 p.m. Eastern Time on May 26, 2011. To listen to the replay, dial (888) 203-1112 (U.S. and Canada) or (719) 457-0820 (international) using conference ID number 1229502. The archived webcast will be available on Ironwood's website for 14 days beginning approximately one hour after the call.

About Ironwood Pharmaceuticals

Ironwood Pharmaceuticals (NASDAQ: IRWD) is an entrepreneurial pharmaceutical company dedicated to the art and science of great drugmaking. Linaclotide, Ironwood's GC-C agonist, is in Phase 3 clinical development for the treatment of irritable bowel syndrome with constipation (IBS-C) and chronic constipation. Ironwood also has a growing pipeline of additional drug candidates in earlier stages of development. Ironwood is located in Cambridge, Mass. To learn more, visit www.ironwoodpharma.com.

Ironwood Pharmaceuticals, Inc.
Susan Brady, 617-621-8304
Corporate Communications
sbrady@ironwoodpharma.com

Source: Ironwood Pharmaceuticals, Inc.

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