Overview Pharmacogenetics of Nicotine Addiction Treatment Status: Completed Trial end date: 2014-09-01 Target enrollment: Participant gender: Summary The purpose of this research program is to understand how a biomarker called the "nicotine metabolite ratio" (also referred to as NMR) may influence a smoker's ability to quit smoking. Phase: Phase 3 Details Lead Sponsor: University of PennsylvaniaCollaborator: National Institute on Drug Abuse (NIDA)Treatments: NicotineVarenicline