Ironwood Pharmaceuticals, Inc., a healthcare company, focuses on the development and commercialization of gastrointestinal (GI) products. It markets linaclotide, a guanylate cyclase type-C agonist for the treatment of adults suffering from irritable bowel syndrome with constipation (IBS-C) or chronic idiopathic constipation (CIC) under the LINZESS name in the United States and Mexico, as well as under the CONSTELLA name in the Canada and European Union. The company is also developing IW-3300, a GC-C agonist for the treatment of visceral pain conditions, including interstitial cystitis/bladder pain syndrome and endometriosis; and CNP-104, an immune nanoparticle for the treatment of biliary cholangitis.