Not applicableWithdrawnNCT06983392What this trial is testingPersistence of Oral DNA Adducts in Smokers and VapersWho this might be right forSmokersVapingHealthy Volunteers University of Minnesota
Not applicableStudy completedNCT00107562What this trial is testingAdolescent Safer Sex Social Network InterventionWho this might be right forSexual BehaviorAlcohol DrinkingMarijuana Smoking University of North Carolina, Chapel Hill 200
Not applicableStudy completedNCT04238832What this trial is testingSalt-Based E-cigaretteWho this might be right forSmokingTobacco Use Medical University of South Carolina 24
Testing effectiveness (Phase 2)Study completedNCT00743366What this trial is testingEffect of Quetiapine on Marijuana Withdrawal and RelapseWho this might be right forMarijuana Smoking New York State Psychiatric Institute 20
Not applicableNot Yet RecruitingNCT07202039What this trial is testingElectronic Cigarettes as a Harm Reduction Strategy Among People With Opioid Use Disorder on BuprenorphineWho this might be right forTobacco-flavored ECSweet-Cooling ECSweet Non-cooling EC Prisma Health-Upstate 90
Not applicableLooking for participantsNCT07340554What this trial is testingNeuroimaging of Adolescent Cannabis Use TreatmentWho this might be right forCannabis UseCannabis DependenceCannabis Use Disorder+23 more Indiana University 80
Testing effectiveness (Phase 2)WithdrawnNCT05294263What this trial is testingVarenicline for the Treatment of Cannabis and Tobacco Use Disorders in VeteransWho this might be right forTobacco Use DisorderCannabis Use Disorder VA Office of Research and Development
Large-scale testing (Phase 3)Looking for participantsNCT07039175What this trial is testingIntervention to Increase Intention to Change Alcohol/Tobacco Use in Veterans With Chronic DiseaseWho this might be right forTobacco SmokingAlcohol-Related Disorders VA Office of Research and Development 270
Not applicableEnrolling By InvitationNCT06919276What this trial is testingNicotine and Cannabis Vape Labeling Experiment - Spring 2025Who this might be right forVapingAdolescentElectronic Cigarette Use+2 more University of Southern California 3,900
Not applicableLooking for participantsNCT03909477What this trial is testingLongitudinal Study of Xenon-129 MRI Imaging Effects of Cannabis SmokingWho this might be right forCannabis UseCannabis SmokingMarijuana Smoking+1 more Western University, Canada 200
Not applicableTemporarily pausedNCT05401929What this trial is testingTranscranial Magnetic Brain Stimulation to Reduce Cannabis Use in Heavy Cannabis UsersWho this might be right forCannabis Duke University 50
Post-approval studies (Phase 4)Ended earlyNCT04602494What this trial is testingVarenicline For Nicotine Vaping Cessation In Non Smoker Vaper AdolescentsWho this might be right forVapingNicotine Dependence Massachusetts General Hospital 5
Testing effectiveness (Phase 2)UnknownNCT00678938What this trial is testingSmoking Interventions in the General PopulationWho this might be right forTobacco Smoking University Medicine Greifswald 1,462
Not applicableLooking for participantsNCT07098065What this trial is testingHealth Warnings and Counseling for Smoking CessationWho this might be right forTobacco CessationHealth Warning LabelHypertension+1 more Hitotsubashi University 5,052
Not applicableLooking for participantsNCT06232447What this trial is testingMenthol, Inflammation, and Nicotine Transition StudyWho this might be right forCigarette SmokingInflammatory Response Rosalind Franklin University of Medicine and Science 68
Testing effectiveness (Phase 2)Ended earlyNCT01228994What this trial is testingBaclofen for Smoking Cessation in a Non-Psychiatric PopulationWho this might be right forNicotine Dependence Centre for Addiction and Mental Health 6
Not applicableStudy completedNCT00310115What this trial is testingMotivational Counseling in Preventing Smoking Relapse After Pregnancy in Pregnant Women Who Quit Smoking During PregnancyWho this might be right forBladder CancerCervical CancerEsophageal Cancer+8 more M.D. Anderson Cancer Center 469
Very early researchStudy completedNCT01434342What this trial is testingFeasibility of Delivering a Quitline Based Smoking Cessation Intervention in Cancer PatientsWho this might be right forLung CancerTobacco Use DisorderBreast Cancer+2 more Wake Forest University Health Sciences 146
Not applicableStudy completedNCT05620433What this trial is testingJoint Effort 2.0: a Mobile Application With University StudentsWho this might be right forCannabis UseCannabisCannabis Dependence+2 more Centre hospitalier de l'Université de Montréal (CHUM) 354
Not applicableNot Yet RecruitingNCT07372183What this trial is testingWound Healing Following Extraction and Ridge Preservation in Smokers and Non-smokersWho this might be right forSmoking, CigaretteAlveolar Bone GraftingWound Healing+2 more Marquette University 12