Purdue Pharma helps bring patients relief from pain. The company researches, develops, makes, and markets prescription and over-the-counter medicines and healthcare products for pain relief. They include sustained-release and long-acting treatments for chronic and severe pain. Purdue has an exclusive US licensing and co-promotion agreement with Labopharm Inc. of Laval, Canada for Ryzolt (tramadol HCl extended-release tablets), an extended release formulation of tramadol. Its other opioid drugs for pain relief include controlled-release analgesic OxyContin (a version of oxycodone), and morphine drug MS Contin.