Not applicableStudy completedNCT01536912What this trial is testingMedical Marijuana Use in HIV+ Patients: Probability SurveyWho this might be right forHIV Positive Wayne State University 218
Not applicableStudy completedNCT01096303What this trial is testingEffects of Marijuana Used on Lung Function in Persons With Chronic Obstructive Pulmonary Disease (COPD)Who this might be right forChronic Obstructive Pulmonary Disease The University of Texas Health Science Center, Houston 200
Not applicableWithdrawnNCT04266314What this trial is testingMaternal Marijuana Use and Fetal and Infant OutcomeWho this might be right forCannabis Use DisorderPregnancy Related Johns Hopkins University
Not applicableStudy completedNCT06919276What this trial is testingNicotine and Cannabis Vape Labeling Experiment - Spring 2025Who this might be right forVapingAdolescentElectronic Cigarette Use+2 more University of Southern California 3,048
Not applicableStudy completedNCT01536899What this trial is testingMedical Marijuana Use in HIV+ Patients Prospective Cohort StudyWho this might be right forHIV PositiveMarijuana Smoking Wayne State University 119
Not applicableStudy completedNCT07413432What this trial is testingA Virtual Reality Game to Prevent E-cigarette and Cannabis VapingWho this might be right forCannabisVapingEmotion Regulation Yale University 62
Not applicableStudy completedNCT04968275What this trial is testingA Cannabis Harm Reduction e-Intervention for Young Cannabis Users With Early PsychosisWho this might be right forPsychotic DisorderMarijuana UseYoung Adult Centre hospitalier de l'Université de Montréal (CHUM) 101
Not applicableStudy completedNCT03722888What this trial is testingDevelopment of a Videogame Prototype Targeting Cigarette and Marijuana Smoking, and Tobacco Product Prevention Among Young Adolescents (smokeScreen)Who this might be right forSmoking Yale University 40
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 applicableStudy completedNCT02744118What this trial is testingHelping Eliminate Marijuana Use Through Pediatric PracticeWho this might be right forMarijuana American Academy of Pediatrics 620
Not applicableActive Not RecruitingNCT06120855What this trial is testingStudy on Regulated Cannabis Sales in PharmaciesWho this might be right forMarijuana SmokingCannabisCannabis Use University of Bern 1,177
Not applicableStudy completedNCT02063984What this trial is testingBehavioral Treatment of Adolescent Substance UseWho this might be right forSubstance Use Disorders Dartmouth-Hitchcock Medical Center 59
Not applicableStudy completedNCT03360799What this trial is testingQuestionnaires in Assessing Attitudes About Legalization of Marijuana Use in Participants With CancerWho this might be right forMalignant Neoplasm M.D. Anderson Cancer Center 103
Not applicableStudy completedNCT03927053What this trial is testingConsequences of Marijuana Use in HIV-infected YouthWho this might be right forYouth With HIV Duke University 21
Not applicableStudy completedNCT03107936What this trial is testingDevelopment of a Videogame Prototype Targeting Cigarette and Marijuana Smoking, and Tobacco Product Prevention Among Young AdolescentsWho this might be right forSmoking Yale University 40
Not applicableLooking for participantsNCT05991882What this trial is testingMobile Intervention for Simultaneous Alcohol and Marijuana Use in Young AdultsWho this might be right forAlcohol DrinkingCannabis Use Kaiser Permanente 136
Testing effectiveness (Phase 2)Study completedNCT01292642What this trial is testingCognitive Behavioral Therapy and the Nicotine Transdermal Patch for Cannabis Dependence and Nicotine DependenceWho this might be right forCannabis DependenceNicotine Dependence Mclean Hospital 12
Testing effectiveness (Phase 2)Study completedNCT00403117What this trial is testingEffects of a Range of Naltrexone Doses in Combination With Smoked MarijuanaWho this might be right forMarijuana Use New York State Psychiatric Institute 49
Not applicableStudy completedNCT04827992What this trial is testingEvaluation of Medical Cannabis and Prescription Opioid Taper Support for Reduction of Pain and Opioid Dose in Patients With Chronic Non-Cancer PainWho this might be right forOpioid UsePainMarijuana Use Massachusetts General Hospital 87
Not applicableNot Yet RecruitingNCT07489443What this trial is testingFeasibility and Acceptability Trial to Reduce Tobacco and Cannabis Use During Pregnancy and PostpartumWho this might be right forPerinatalCannabis UseTobacco Use+1 more University of Pittsburgh 25