Overview Study of Bupropion Versus Bupropion + Naltrexone for Smoking Cessation Status: Unknown status Trial end date: 2010-07-01 Target enrollment: Participant gender: Summary The purpose of this study is to compare the effects of bupropion + placebo to bupropion + naltrexone as treatments to help smokers quit. Phase: Phase 2/Phase 3 Details Lead Sponsor: University of MinnesotaUniversity of Minnesota - Clinical and Translational Science InstituteCollaborator: National Institute on Drug Abuse (NIDA)Treatments: BupropionNaltrexone