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Showing 1–24 of 395 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Marijuana-Related Disorder Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Pregnancy-associated Hormones on THC Metabolism in Women

NCT04374773
View directory record Official record
Conditions
Pregnancy Related, Cannabis Use
Interventions
Dronabinol
Drug
Lead sponsor
University of Washington
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 1Phase 2 Interventional

Effects of Smoked Marijuana on Neuropathic Pain

NCT00254761
View directory record Official record
Conditions
Neuropathic Pain
Interventions
Cannabis
Drug
Lead sponsor
Center for Medicinal Cannabis Research
Other
Eligibility
18 Years to 70 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Feb 27, 2008 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Marijuana's Impact on Alcohol Motivation and Consumption

NCT02983773
View directory record Official record
Conditions
Alcohol Drinking, Marijuana
Interventions
THC 7.2%, THC 3.1%, Placebo
Drug
Lead sponsor
Brown University
Other
Eligibility
21 Years to 44 Years
Enrollment
157 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Jul 22, 2026, 9:14 AM EDT
Not listed No phase listed Observational

The Use of Medicinal Cannabinoids as Adjunctive Treatment for Medically Refractory Epilepsy

NCT02523183
View directory record Official record
Conditions
Epilepsy, Unspecified, Refractory (Medically)
Interventions
Medical Cannabis
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
1 Month to 20 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 17, 2020 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Not applicable Interventional Results available

An App to Reduce Cannabis Use Among Emerging Adults

NCT05824754
View directory record Official record
Conditions
Cannabis Use
Interventions
Just-In-Time-Adaptive-Intervention (JITAI)
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 25 Years
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 11, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 2 Interventional Results available

Therapeutic Substance Abuse Treatment in Pregnancy - 1

NCT00227903
View directory record Official record
Conditions
Alcohol Abuse, Cocaine Abuse, Marijuana Abuse
Interventions
MI-CBT, Brief Advice
Behavioral
Lead sponsor
Yale University
Other
Eligibility
16 Years to 45 Years · Female only
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
2
States / cities
Bridgeport, Connecticut • New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 14, 2020 · Synced Jul 22, 2026, 9:14 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 22, 2026, 9:14 AM EDT
Completed Not applicable Interventional

Peer Approaches to Substances in Early Psychosis Programs: A Pilot Study of a Peer-Led Intervention

NCT04517279
View directory record Official record
Conditions
Psychotic Disorders, Substance Use
Interventions
Peer Approach to Substances in Early Psychosis Programs, Usual Care Peer Services
Behavioral
Lead sponsor
University of Texas at Austin
Other
Eligibility
15 Years to 32 Years
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
15
States / cities
Austin, Texas • Beaumont, Texas • Big Spring, Texas + 12 more
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 4 Interventional

Substance Dependent Teens - Impact of Treating Depression Study 1 - 1

NCT00061113
View directory record Official record
Conditions
Alcohol-Related Disorders, Marijuana Abuse, Substance-Related Disorders
Interventions
Fluoxetine + outpatient cognitive behavioral therapy, fluoxetine, placebo + CBT
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
13 Years to 19 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
2
States / cities
Aurora, Colorado • Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Jul 22, 2026, 9:14 AM EDT
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

The Pharmacokinetics of a Hemp-Based Topical Product

NCT07603518
View directory record Official record
Conditions
Cannabis
Interventions
CBD, THC
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Jul 22, 2026, 9:14 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cannabis Observations on Brain Waves, Retrieval, and Attention: Experiment 1

NCT05868213
View directory record Official record
Conditions
Cannabis, Memory, Electroencephalography
Interventions
Cannabis (smoked flower)
Drug
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
21 Years to 40 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jul 22, 2026, 9:14 AM EDT
Completed No phase listed Observational Results available

Pain Research: Innovative Strategies With Marijuana

NCT03522324
View directory record Official record
Conditions
Chronic Pain, Chronic Low Back Pain, Cannabis Use
Interventions
Cannabis Edible
Drug
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
21 Years to 70 Years
Enrollment
268 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition

NCT02404688
View directory record Official record
Conditions
Cannabis, Alcohol Effect, Driving Under the Influence of Alcohol and Other Drugs
Interventions
Active delta-9-THC, Placebo, Active Ethanol
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2026
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

The Effects of Cannabidiol and ∆-9-THC in Humans

NCT01180374
View directory record Official record
Conditions
Healthy
Interventions
Cannabidiol, Delta-9-THC, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 30, 2022 · Synced Jul 22, 2026, 9:14 AM EDT
Terminated Phase 2 Interventional Results available

Vaped Marijuana to Attenuate Naloxone-Precipitated Withdrawal

NCT05114460
View directory record Official record
Conditions
Opioid Overdose
Interventions
Naloxone, Marijuana
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 55 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 17, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 2 Interventional Results available

Pilot Study of the Safety and Efficacy of Four Different Potencies of Smoked Marijuana in 76 Veterans With PTSD

NCT02759185
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
High THC cannabis, High CBD cannabis, THC/CBD cannabis, Placebo cannabis
Drug
Lead sponsor
Multidisciplinary Association for Psychedelic Studies
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 11, 2023 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Not applicable Interventional

Alcohol, Suicide and HIV Prevention for Teens in Mental Health Treatment

NCT02228044
View directory record Official record
Conditions
Suicide, Alcohol Abuse, Drug Abuse, HIV
Interventions
Prevention program
Behavioral
Lead sponsor
George Mason University
Other
Eligibility
13 Years to 18 Years
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2014
U.S. locations
1
States / cities
Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 27, 2014 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 4 Interventional Results available

Treatment of Schizophrenia and Comorbid Cannabis Use Disorder: Comparing Clozapine to Treatment-as-Usual

NCT00498550
View directory record Official record
Conditions
Schizophrenia, Dual Diagnosis, Schizoaffective Disorder, Psychotic Disorder, Cannabis Abuse
Interventions
Clozapine, Treatment as usual
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2009
U.S. locations
4
States / cities
Los Angeles, California • Kansas City, Missouri • Manchester, New Hampshire + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Medical Marijuana on Neurocognition and Escalation of Use

NCT03224468
View directory record Official record
Conditions
Pain, Insomnia, Depression, Anxiety
Interventions
Medical Marijuana
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
269 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2023 · Synced Jul 22, 2026, 9:14 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cannabis Observations on Brain Waves, Retrieval, and Attention: Experiment 3

NCT06669585
View directory record Official record
Conditions
Cannabis, Memory, Electroencephalography
Interventions
Cannabis (smoked flower)
Drug
Lead sponsor
L. Cinnamon Bidwell
Other
Eligibility
21 Years to 40 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Jul 22, 2026, 9:14 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Neural Correlates of Cannabis Use

NCT03104257
View directory record Official record
Conditions
Cannabis Dependence, Healthy
Interventions
[11-C]OMAR
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
162 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Recruiting No phase listed Observational

Cannabis Use and Outcomes in Black and White Patients With Cancer

NCT06037681
View directory record Official record
Conditions
Cancer
Interventions
Not listed
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
21 Years to 99 Years
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
3
States / cities
Buffalo, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Cannabis, Schizophrenia and Reward: Self-Medication and Agonist Treatment?

NCT01964404
View directory record Official record
Conditions
Schizophrenia, Dual Diagnosis, Psychotic Disorder, Cannabis Use Disorder
Interventions
Marijuana, Dronabinol, Placebo
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 55 Years
Enrollment
263 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2021
U.S. locations
2
States / cities
Lebanon, New Hampshire • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Dec 8, 2025 · Synced Jul 22, 2026, 9:14 AM EDT
Completed Not applicable Interventional

Do Discounted Vouchers for Medical Cannabis Reduce Opioid Use in Adults With Pain

NCT04495725
View directory record Official record
Conditions
Opioid Use, Marijuana, Chronic Pain
Interventions
Discounted Vouchers for Medical Cannabis Soft-Gel Capsule Products
Other
Lead sponsor
Vireo Health
Other
Eligibility
18 Years to 99 Years
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Queens, New York
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Jul 22, 2026, 9:14 AM EDT