Overview Study to Compare Oxymorphone Extended-Release (Opana ER) Versus Oxycodone Controlled-Release (Oxycontin) Status: Completed Trial end date: 2009-09-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the subjective and objective effects of Oxymorphone ER (Opana ER) versus Oxycodone CR (Oxycontin). Phase: Phase 4 Details Lead Sponsor: Endo PharmaceuticalsCollaborators: Kendle Early Stage - TorontoKendle Early Stages TorontoTreatments: Analgesics, OpioidHydromorphoneOxycodoneOxymorphone