DURHAM, NC--(Marketwired - April 01, 2015) - Patheon, a leading global provider of high-quality drug development and delivery solutions to the pharmaceutical and biopharma sectors, has closed the previously announced transaction to acquire IRIX Pharmaceuticals, a Florence, S.C.-headquartered�company that specializes in making difficult to manufacture Active Pharmaceutical Ingredients (API) for drugs from early and late development, through commercial launch. With the acquisition, Patheon establishes a North American presence for comprehensive API development and manufacturing to address customers' most challenging needs for drugs in all development phases.�