Ironwood Pharmaceuticals, Inc., a commercial biotechnology company, engages in the research, development, and commercialization of human therapeutic products. The company 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 CONSTELLA name in the European Union; MD-7246, an oral, intestinal, non-opioid, pain-relieving agent for patients suffering from IBS with diarrhea; and IW 3718, a gastric retentive formulation of a bile acid sequestrant, which is in Phase III clinical trials for the treatment of GERD. The company pipeline products also include olinciguat, an oral and once-daily vascular sGC stimulator, which is in Phase II trials for the treatment of patients suffering from sickle cell diseases; praliciguat, an oral, once daily systemic sGC stimulator that is in Phase II trials for the treatment of heart failure and for diabetic nephropathy; IW 6463, a central nervous system penetrant oral sGC stimulator in clinical development for serious neurodegenerative diseases; and two organ targeted programs for the treatment of liver and lung. Ironwood Pharmaceuticals, Inc. has collaboration agreements with Allergan plc and AstraZeneca AB to develop and commercialize linaclotide for the treatment of IBS-C, CIC, and other gastrointestinal (GI) conditions in North America, China, Hong Kong, Macau, and Japan, as well as a license agreement with Astellas Pharma Inc. to develop and commercialize linaclotide for the treatment of IBS-C, CIC, and other GI conditions in Japan. The company was formerly known as Microbia, Inc. and changed its name to Ironwood Pharmaceuticals, Inc. in April 2008. Ironwood Pharmaceuticals, Inc. was founded in 1998 and is headquartered in Boston, Massachusetts.