Overview Study Evaluating The Efficacy Of Varenicline In Cessation Of Oral Smokeless Tobacco Use Status: Completed Trial end date: 2009-07-01 Target enrollment: Participant gender: Summary The primary goal of this study is to compare efficacy of varenicline to placebo for cessation of use of smokeless tobacco. Phase: Phase 4 Details Lead Sponsor: PfizerTreatments: LobelineVarenicline