NCT04200534 2025-08-22Centralized Lung Cancer EARly Detection Among Smokers (CLEAR Study)M.D. Anderson Cancer CenterPhase EARLY_PHASE1 Active not recruiting358 enrolled
NCT00790569 2018-06-06Varenicline or Nicotine Patch and Nicotine Gum in Helping Smokers in a Methadone Treatment Program Stop SmokingButler HospitalPhase NA Completed315 enrolled 19 charts
NCT00033592 2016-07-13Comparison of Nicotine Inhaler and/or Bupropion in Helping People to Stop Smoking and Prevent the Recurrence of SmokingAlliance for Clinical Trials in OncologyPhase 3 Completed1,708 enrolled