Overview Methadone/Buprenorphine Cross-Over Study - 4 Status: Completed Trial end date: 1969-12-31 Target enrollment: Participant gender: Summary The purpose of this study is to explore ways to cross patients over from methadone to buprenorphine. Phase: Phase 2 Details Lead Sponsor: National Institute on Drug Abuse (NIDA)Treatments: BuprenorphineMethadone