Ironwood Pharmaceuticals, Inc. operates as a healthcare enterprise primarily dedicated to discovering, developing, and commercializing therapeutic solutions for gastrointestinal (GI) conditions. Its flagship commercial product is linaclotide, a guanylate cyclase type-C (GC-C) agonist. This medication is prescribed for adult patients managing irritable bowel syndrome with constipation (IBS-C) or chronic idiopathic constipation (CIC), sold as LINZESS in the United States and Mexico, and under the CONSTELLA brand throughout Canada and the European Union. Beyond its marketed offerings, Ironwood's development pipeline includes IW-3300, another GC-C agonist targeting various visceral pain conditions, such as interstitial cystitis/bladder pain syndrome and endometriosis. Additionally, the company is advancing CNP-104, an immune nanoparticle being investigated for biliary cholangitis. Ironwood maintains key strategic alliances with AbbVie Inc., AstraZeneca AB, and Astellas Pharma Inc. to support the ongoing development and market introduction of linaclotide. Established in 1998, the Boston, Massachusetts-based firm initially operated as Microbia, Inc. before officially rebranding to Ironwood Pharmaceuticals, Inc. in April 2008.