Purdue Pharma Canada is a research-based pharmaceutical company with its headquarters, R&D operations, and manufacturing located in Pickering, Ontario. The company is a leader in the research and development of medicines for the treatment of pain and central nervous system disorders (ADHD) and a growing pipeline of prescription and over the counter products. Privately held, Purdue Pharma Canada is independently associated with the worldwide Purdue/Napp/Mundipharma network of companies.