Overview ALK33BUP-101: Safety and Pharmacodynamic Effects of ALKS 33-BUP Administered Alone and When Co-administered With Cocaine Status: Completed Trial end date: 2012-02-01 Target enrollment: Participant gender: Summary The purpose of this study is to assess the safety and tolerability of ALKS33-BUP when administered to opioid-experienced cocaine abusers. Phase: Phase 1 Details Lead Sponsor: Alkermes, Inc.Collaborator: National Institute on Drug Abuse (NIDA)Treatments: ALKS-33BuprenorphineCocaine