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Showing 1–24 of 95 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Marijuana Smoking Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Adolescent Safer Sex Social Network Intervention

NCT00107562
View directory record Official record
Conditions
Sexual Behavior, Alcohol Drinking, Marijuana Smoking
Interventions
Adolescent Safer Sex Social Network Intervention
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
16 Years to 19 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
2
States / cities
Tampa, Florida • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 27, 2017 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

iSTART: A Campus & Community Initiative for Services in Tec-health

NCT05362357
View directory record Official record
Conditions
Substance Use, Binge Drinking, Marijuana Use, Alcohol Drinking, Prescription Opioid Misuse, Illicit Drug Use
Interventions
iSTART Web-app
Behavioral
Lead sponsor
California State University, Northridge
Other
Eligibility
18 Years to 30 Years
Enrollment
1,100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Northridge, California
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Jul 19, 2026, 10:19 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Correlation of Women's Sexual Health and Marijuana Use

NCT02865096
View directory record Official record
Conditions
Women's Sexual Health
Interventions
Not listed
Lead sponsor
St. Louis University
Other
Eligibility
18 Years to 90 Years · Female only
Enrollment
373 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 6, 2017 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Young Adult Tobacco/Nicotine and Cannabis Co-use

NCT06239350
View directory record Official record
Conditions
Tobacco Use Disorder, Nicotine Dependence
Interventions
Counseling, Contingency management, Text-based support
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 25 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

MiREA-AC for Reducing Problematic Alcohol and Marijuana Use in College Students

NCT07339150
View directory record Official record
Conditions
Alcohol Misuse, Cannabis Misuse
Interventions
Motivational Intervention Reduction through Ecological Application (MiREA-A). MiREA-AC-- the expanded MiREA-A,
Behavioral
Lead sponsor
mHealth Systems Inc.
Industry
Eligibility
18 Years to 26 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
2
States / cities
Charlotte, North Carolina • Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Effect of Cannabis on E-Cigarette Use Behavior

NCT06609109
View directory record Official record
Conditions
Cannabis Use, Tobacco Use, Electronic Cigarette Use
Interventions
THC High Dose, THC Low Dose, THC 0mg, E-Cigarette Full Nicotine, E-Cigarette Placebo Nicotine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 4 Interventional Results available

Cannabis and Tobacco Co-use Study

NCT04228965
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Varenicline, Contingency Management, Counseling
Drug · Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 40 Years
Enrollment
181 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
3
States / cities
Charleston, South Carolina • Florence, South Carolina • Pickens, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional

TECH App Marijuana Use Intervention for Court-Involved Adolescents

NCT05979272
View directory record Official record
Conditions
Cannabis Use, Adolescent
Interventions
Treatment as usual, Teen Empowerment through Computerized Health (TECH) app
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
14 Years to 18 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
4
States / cities
Chicago, Illinois • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting Not applicable Interventional

Feasibility and Acceptability Trial to Reduce Tobacco and Cannabis Use During Pregnancy and Postpartum

NCT07489443
View directory record Official record
Conditions
Perinatal, Cannabis Use, Tobacco Use, Smoking Cessation
Interventions
Perinatal smoking cessation treatment and maintenance sessions
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older · Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Helping Eliminate Marijuana Use Through Pediatric Practice

NCT02744118
View directory record Official record
Conditions
Marijuana
Interventions
5A's Model, Healthy Internet Use Model
Other
Lead sponsor
American Academy of Pediatrics
Other
Eligibility
13 Years to 25 Years
Enrollment
620 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Elk Grove Village, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 8, 2020 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

An Effectiveness Trial of Project ALERT

NCT00650585
View directory record Official record
Conditions
Alcohol Drinking, Smoking, Marijuana Smoking
Interventions
Project ALERT
Behavioral
Lead sponsor
Pacific Institute for Research and Evaluation
Other
Eligibility
Not listed
Enrollment
8,338 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 12, 2013 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional

A Real-time, Contextual Intervention Using Mobile Technology to Reduce Marijuana Use in Youth

NCT01762696
View directory record Official record
Conditions
Marijuana Abuse
Interventions
MET, MOMENT
Behavioral
Lead sponsor
Boston Children's Hospital
Other
Eligibility
15 Years to 24 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
2
States / cities
Boston, Massachusetts • Jamaica Plain, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 11, 2016 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional

Influencer E-Cigarette and Cannabis Marketing: a Survey-Based Experiment Among Adolescents

NCT06919263
View directory record Official record
Conditions
Electronic Nicotine Delivery Systems
Interventions
Influencer marketing
Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
16 Years to 17 Years
Enrollment
1,462 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Development of a Videogame Prototype Targeting Cigarette and Marijuana Smoking, and Tobacco Product Prevention Among Young Adolescents (smokeScreen)

NCT03722888
View directory record Official record
Conditions
Smoking
Interventions
smokeSCREEN video game
Device
Lead sponsor
Yale University
Other
Eligibility
11 Years to 14 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
3
States / cities
Hamden, Connecticut • New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 28, 2018 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 2 Interventional Results available

Laboratory Study of Cannabidiol on the Effects of Smoked Marijuana

NCT01844687
View directory record Official record
Conditions
Smoking, Marijuana
Interventions
CBD
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
3
States / cities
Lexington, Kentucky • New York, New York • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Carcinogen and Toxicant Exposure Among Young Adults Who Co-Use E-cigarettes and Cannabis (Co-Tox Study)

NCT07167225
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma, E-Cig Use
Interventions
Effectiveness of different recruitment approaches, Choice of study completion locations, Cannabis Engagement Assessment, E-cigarette dependence Scale
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 25 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Families With Substance Use and Psychosis: A Pilot Study

NCT04284813
View directory record Official record
Conditions
Psychosis, Substance Use, Substance Use Disorders, Family, Tobacco Use, Nicotine Use Disorder, Cigarette Smoking, Cannabis, Marijuana, Alcohol Use Disorder, Alcohol, Schizophrenia, Schizoaffective Disorder, Bipolar Disorder, Mental Disorder
Interventions
CRAFT-FT
Behavioral
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 11, 2022 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Laboratory Model of Increasing Delta-9-tetrahydrocannabinol (THC) Potency on Cigarette Smoking

NCT02961309
View directory record Official record
Conditions
Tobacco Use
Interventions
THC
Drug
Lead sponsor
Battelle Memorial Institute
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 1, 2019 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 2 Interventional Results available

Varenicline Treatment for Cannabis Use Disorder

NCT02892110
View directory record Official record
Conditions
Substance Use Disorder
Interventions
Varenicline, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 2, 2019 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

TACUNA (Traditions and Connections for Urban Native Americans)

NCT04617938
View directory record Official record
Conditions
Opioid Use, Alcohol Drinking, Marijuana Use
Interventions
TACUNA plus Wellness Circle, Opioid Education Workshop
Behavioral
Lead sponsor
RAND
Other
Eligibility
18 Years to 25 Years
Enrollment
541 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
3
States / cities
Los Angeles, California • Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Vaping THC From Electronic Cigarettes

NCT02955329
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Nicotine, Cannabis, PAX Loose Leaf Vaporizer
Drug · Device
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 70 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 28, 2023 · Synced Jul 19, 2026, 10:19 AM EDT
Completed No phase listed Observational

Medical Marijuana Use in HIV+ Patients: Probability Survey

NCT01536912
View directory record Official record
Conditions
HIV Positive
Interventions
Not listed
Lead sponsor
Wayne State University
Other
Eligibility
18 Years to 70 Years
Enrollment
218 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 29, 2015 · Synced Jul 19, 2026, 10:19 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Perceptual Influences From Smoking Cannabis: an Experimental Study

NCT06588582
View directory record Official record
Conditions
Cannabis Use, Stress
Interventions
Water Temperature Variation - WW, Water Temperature Variation - CW
Other
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
21 Years to 65 Years
Enrollment
166 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Jul 19, 2026, 10:19 AM EDT
Completed Phase 2 Interventional

Effect of PP-01 on Cannabis Withdrawal Syndrome

NCT05494437
View directory record Official record
Conditions
Cannabis Withdrawal
Interventions
PP-01 High Dose, PP-01 Low Dose, Placebo, Nabilone, Gabapentin
Combination Product · Drug
Lead sponsor
PleoPharma, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
234 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
18
States / cities
Glendale, California • Lemon Grove, California • Orange, California + 15 more
Source: ClinicalTrials.gov public record
Updated Aug 15, 2024 · Synced Jul 19, 2026, 10:19 AM EDT