OSAKA, Japan & STAMFORD, Conn.– — Shionogi & Co., Ltd. , a drug-discovery based pharmaceutical company dedicated to developing medicines that protect the health and well-being of patients, and its wholly-owned U.S. subsidiary, Shionogi Inc. , and Purdue Pharma L.P. , a privately-held pharmaceutical company founded by physicians over 60 years ago, distinguished by its pioneering research, products and medical programs directed toward alleviating pain, today announced the establishment of an alliance for the joint U.S. launch and commercialization of SymproicA .