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Showing 1–24 of 29 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Marijuana User Clear all
Recruiting Not applicable Interventional

Evaluation of a Brief Computerized and Smart Phone-based Intervention for Stress in Regular Cannabis Users

NCT06085222
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Emotional Engagement Distress Tolerance Intervention, Health Education Intervention
Behavioral
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 30 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Sep 21, 2025 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional

Affective Management Training for Cannabis Misuse

NCT03432013
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
CUD-AMT, SUD-CBT
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 25 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 16, 2022 · Synced Jul 22, 2026, 10:50 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Attempts to Stop/Reduce Marijuana Among Dependent Users

NCT01039415
View directory record Official record
Conditions
Marijuana Abuse, Marijuana Dependence
Interventions
Not listed
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
234 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Oct 30, 2016 · Synced Jul 22, 2026, 10:50 AM EDT
Completed No phase listed Observational Results available

Feasibility and Validation of a Standard Phenotyping Assessment Battery

NCT03495869
View directory record Official record
Conditions
Opioid-use Disorder, Cocaine Use Disorder, Marijuana Use Disorder, Healthy Controls
Interventions
Not listed
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 70 Years
Enrollment
368 participants
Timeline
2018 – 2020
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 3, 2021 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional

CONNECT for Depressed Cannabis Users Trial

NCT03727659
View directory record Official record
Conditions
Substance Abuse, Depression
Interventions
SHADE therapy + CONNECT FaceBook support
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 9, 2021 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Project CheckUP: A Brief Behavioral Intervention for Quitline Callers Who Use Marijuana (MJ) and Tobacco

NCT04737772
View directory record Official record
Conditions
Smoking Cessation, Marijuana Use
Interventions
Behavioral: Quitline treatment as usual, QL Marijuana Check-Up intervention (QL-MJCU)
Behavioral
Lead sponsor
Consumer Wellness Solutions
Industry
Eligibility
21 Years and older
Enrollment
107 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 26, 2025 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

The Effect of Prescription Medications in Marijuana Users

NCT00893074
View directory record Official record
Conditions
Marijuana Abuse
Interventions
Dronabinol 30mg/day, Dronabinol 60mg/day, Dronabinol 120mg/day, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 2, 2017 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Phase 4 Interventional

Improving Substance Use and Clinical Outcomes in Heavy Cannabis Users With Quetiapine

NCT01153490
View directory record Official record
Conditions
Cannabis Dependence
Interventions
Behavioral Intervention
Behavioral
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 65 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Glen Oaks, New York • Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2018 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigating Real-world Stress-related Mechanisms in Heavy Cannabis Users

NCT05833230
View directory record Official record
Conditions
Cannabis Use, Cannabis, Cannabis Abuse
Interventions
Intensive Day Monitoring
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 3, 2025 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Phase 2 Interventional

Cannabidiol and Older Adult Cannabis Users

NCT06290063
View directory record Official record
Conditions
Sleep, Anxiety, Depression, Pain
Interventions
fsCBD Cannabidiol, bsCBD Cannabidiol, Placebo
Drug
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
60 Years and older
Enrollment
385 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Transcranial Magnetic Brain Stimulation to Reduce Cannabis Use in Heavy Cannabis Users

NCT05401929
View directory record Official record
Conditions
Cannabis
Interventions
iTBS
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Not applicable Interventional

Neuroimaging of Adolescent Cannabis Use Treatment

NCT07340554
View directory record Official record
Conditions
Cannabis Use, Cannabis Dependence, Cannabis Use Disorder, Cannabis Abuse, Cannabis Intoxication, Cannabis Smoking, Cannabis Withdrawal, Cannabis-Related Disorder, Cannabis Abuse, in Remission, Cannabis Abuse, Episodic Use, Marijuana, Marijuana Abuse, Marijuana Use, Marijuana Smoking, Marijuana Dependence, Marijuana User, Marijuana-Related Disorder, Marijuana Use Disorder, Addiction, Addiction, Substance, Substance Use, Substance Use Disorders, Substance Dependence, Substance Abuse, Substance Related Problem, Substance Abuse Drug Chronic
Interventions
Contingency Management, Elastic Net Regression
Behavioral · Device
Lead sponsor
Indiana University
Other
Eligibility
14 Years to 17 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Colorado Marijuana Users Health Cohort

NCT02735954
View directory record Official record
Conditions
COPD, Insomnia, Cannabis
Interventions
Marijuana
Other
Lead sponsor
National Jewish Health
Other
Eligibility
21 Years to 80 Years
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional Results available

Effect of Oxytocin on Stress in Marijuana Users

NCT01335789
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Oxytocin, Saline
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 13, 2015 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Phase 2 Interventional

Cannabidiol and Cannabis Concentrate Users

NCT06575751
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Broad Spectrum Cannabidiol (bsCBD) 400 mg, Broad Spectrum Cannabidiol (bsCBD) 200 mg, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
25 Years to 60 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional

Neurobehavioral Measurement of Substance Users in Outpatient Treatment Setting

NCT03662529
View directory record Official record
Conditions
Cocaine Dependence, Cocaine Use Disorder, Opiate Dependence, Opioid-use Disorder, Cannabis Dependence
Interventions
Four-Session Mind Freedom Plan, Treatment as usual therapy
Behavioral
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 6, 2018 · Synced Jul 22, 2026, 10:50 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Evaluation of the Interactions of Cannabidiol (CBD) With Morphine

NCT05143424
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
Morphine Sulfate
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2024 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Phase 2 Interventional

A Study of Cannabidiol in Young Adult Cannabis Users

NCT06569394
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Broad Spectrum Cannabidiol (bsCBD) 400 mg, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 25 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Hormones and Reduction in Co-users of Marijuana and Nicotine

NCT02579421
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Progesterone, placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 60 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Jul 22, 2026, 10:50 AM EDT
Withdrawn Phase 2 Interventional

Effects of Cannabidiol on Psychiatric Symptoms, Cognition, and Cannabis Consumption in Cannabis Users With Recent-Onset Psychosis

NCT03883360
View directory record Official record
Conditions
Schizophrenia Spectrum Disorders, Cannabis Use
Interventions
Cannabidiol (CBD), Placebo
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 35 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2050
U.S. locations
3
States / cities
Los Angeles, California • Baltimore, Maryland • Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 18, 2021 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Phase 1 Interventional

Marijuana Cue-Reactivity & Seeking Behavior in Regular Cannabis Users

NCT03154580
View directory record Official record
Conditions
Marijuana Abuse
Interventions
N-acetyl cysteine
Drug
Lead sponsor
Wayne State University
Other
Eligibility
21 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 22, 2024 · Synced Jul 22, 2026, 10:50 AM EDT
Recruiting Not applicable Interventional

Cannabis and Processing Emotions Study

NCT06907979
View directory record Official record
Conditions
Cannabis Use Disorder, Severe
Interventions
TMS - Sham, TMS - Active iTBS, TMS - Active cTBS
Device
Lead sponsor
Auburn University
Other
Eligibility
18 Years to 50 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Auburn, Alabama
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Active, not recruiting Not applicable Interventional

A Brief Intervention for Alcohol Users With Interpersonal Trauma

NCT05414344
View directory record Official record
Conditions
Heavy Drinking, Alcohol Drinking, Substance Use, Drinking Behavior
Interventions
Standard Brief Intervention, Trauma-Informed and Peer-Supported Brief Intervention, Assessment only
Behavioral
Lead sponsor
Western Kentucky University
Other
Eligibility
18 Years to 25 Years
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bowling Green, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Jul 22, 2026, 10:50 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Effects of Smoked Marijuana on Risk Taking and Decision Making Tasks

NCT00373399
View directory record Official record
Conditions
Marijuana Use Disorder
Interventions
Inactive Marijuana (0% THC), Low THC marijuana (1.8 %THC), High THC marijuana (3.9% THC)
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 45 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 18, 2018 · Synced Jul 22, 2026, 10:50 AM EDT