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ClinicalTrials.gov public records Last synced Oct 20, 2026, 6:15 PM EDT

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Showing 1–24 of 233 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo marijuana Clear all
Completed Early Phase 1 Interventional Accepts healthy volunteers

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

NCT01591629
View directory record Official record
Conditions
Healthy
Interventions
Naloxone, Delta-9-THC, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 9, 2022 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Hallucinogens and Other Drugs on Mood and Performance

NCT02033707
View directory record Official record
Conditions
Healthy
Interventions
Hallucinogens and psychoactive substances
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 16, 2019 · Synced Oct 20, 2026, 6:15 PM EDT
Recruiting Phase 3 Interventional

Efficacy of PP-01 in Mitigating Cannabis Withdrawal Symptoms in Adults With Cannabis Use Disorder

NCT07644052
View directory record Official record
Conditions
Cannabis Withdrawal
Interventions
PP-01, Nabilone, Placebo
Combination Product · Drug
Lead sponsor
PleoPharma, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
22
States / cities
Little Rock, Arkansas • Rogers, Arkansas • New Haven, Connecticut + 19 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 20, 2026, 6:15 PM 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 9, 2025 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Dronabinol (Oral THC) on Cannabis Use

NCT01394185
View directory record Official record
Conditions
Marijuana Smoking
Interventions
Dronabinol 120mg/day, Placebo, Dronabinol 240mg/day
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 100 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 3, 2017 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Marijuana Effects on Simulated Driving Performance

NCT03699540
View directory record Official record
Conditions
Cannabis, Cannabis Use, Marijuana, Marijuana Usage, Alcohol Drinking
Interventions
Marijuana, Alcohol, placebo alcohol, Inactive marijuana
Drug
Lead sponsor
Shanna Babalonis, PhD
Other
Eligibility
21 Years to 50 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Oct 20, 2026, 6:15 PM 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 12, 2023 · Synced Oct 20, 2026, 6:15 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Responses to Marijuana-Related Cues Versus Neutral Cues in Adults Taking Tetrahydrocannabinol (THC) - 2

NCT00218504
View directory record Official record
Conditions
Marijuana Abuse
Interventions
Tetrahydrocannabinol
Drug
Lead sponsor
Wayne State University
Other
Eligibility
21 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 5, 2012 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 3 Interventional

Divalproex Sodium (Depakote) for Explosive Tempers in Adolescents and Adults

NCT00218114
View directory record Official record
Conditions
Attention Deficit and Disruptive Behavior Disorders, Marijuana Abuse
Interventions
Divalproex Sodium, Placebo
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
12 Years to 55 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2005
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 10, 2017 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Early Phase 1 Interventional Results available

Dronabinol Interactions With Cognitive Enhancing Drug in Humans

NCT00842985
View directory record Official record
Conditions
Cannabis, Marijuana Abuse
Interventions
drug condition
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 30, 2017 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Not applicable Interventional Results available

Pain Inflammation and Cannabis in HIV

NCT05554146
View directory record Official record
Conditions
HIV Infections, Neuropathic Pain, Cannabis
Interventions
Receipt of Coupon for Placebo Soft-Gel Capsule, Receipt of Coupon for High THC Soft-Gel Capsule, Receipt of Coupon for Equal THC and CBD Soft-Gel Capsule, Receipt of Coupon for High CBD Soft-Gel Capsule
Other
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 100 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional

Atomoxetine for Treating Marijuana-Abusing Adolescents Who Have Attention Deficit Hyperactivity Disorder

NCT00142961
View directory record Official record
Conditions
Attention Deficit Disorder With Hyperactivity, Marijuana Abuse
Interventions
Atomoxetine, placebo
Drug · Other
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
14 Years to 21 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 23, 2019 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Results available

Effectiveness Study of Dronabinol and BRENDA for the Treatment of Cannabis Withdrawal

NCT00480441
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Dronabinol, BRENDA therapy, Placebo
Drug · Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 55 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 29, 2019 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effects of Delta-9-THC and Iomazenil in Healthy Humans

NCT00982982
View directory record Official record
Conditions
Schizophrenia, Mental Disorders, Psychotic Disorders
Interventions
THC and Iomazenil, Placebo (control)
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 5, 2022 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1Phase 2 Interventional

Medicinal Cannabis for Painful HIV Neuropathy

NCT00255580
View directory record Official record
Conditions
Neuropathic Pain
Interventions
Smoked cannabis
Drug
Lead sponsor
Center for Medicinal Cannabis Research
Other
Eligibility
21 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2008 · Synced Oct 20, 2026, 6:15 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Cannabis Consumption and Driving Impairment Assessment on a Closed Course

NCT06059677
View directory record Official record
Conditions
Cannabis Smoking, Driving Impaired
Interventions
Active smoked cannabis, Placebo smoked cannabis
Drug
Lead sponsor
Bayliss J. Camp, PhD
Government
Eligibility
21 Years to 55 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2023 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Impact of Oral Cannabis Administration and Co-Administration of Alcohol on Impairment

NCT04931095
View directory record Official record
Conditions
Cannabis Intoxication, Alcohol Intoxication
Interventions
Cannabis, Alcohol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years to 55 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Differences in Cannabis Impairment and Its Measurement Due to Route of Administration

NCT03122691
View directory record Official record
Conditions
Behavioral Pharmacology of Cannabis
Interventions
cannabis
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 45 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Oct 20, 2026, 6:15 PM EDT
Not yet recruiting Phase 1 Interventional

Cannabis and Opioid Use Disorder, Study 2

NCT07661446
View directory record Official record
Conditions
Opioid Use Disorders, Cannabis Use
Interventions
Inhaled Cannabis, Intranasal Opioid
Drug
Lead sponsor
University of Kentucky
Other
Eligibility
18 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Results available

Treatment for Cannabis Withdrawal and Dependence

NCT01611948
View directory record Official record
Conditions
Cannabis Dependence
Interventions
Aprepitant, Placebo, Manual-guided behavioral counseling
Drug · Behavioral
Lead sponsor
The Scripps Research Institute
Other
Eligibility
18 Years to 70 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Results available

UH3 Varenicline for Cannabis Use Disorder

NCT03980561
View directory record Official record
Conditions
Cannabis Use Disorder
Interventions
Varenicline, Placebo
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
2
States / cities
Charleston, South Carolina • Pickens, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 18, 2024 · Synced Oct 20, 2026, 6:15 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

The Effects of Cannabis Use in People With Schizophrenia on Clinical, Neuropsychological and Physiological Phenotypes

NCT01832766
View directory record Official record
Conditions
Schizophrenia
Interventions
Dronabinol, Placebo Comparator
Drug · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 21, 2015 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional

Effect of AEF0117 on Subjective Effects of Cannabis in CUD Subjects

NCT03717272
View directory record Official record
Conditions
Marijuana Abuse
Interventions
AEF0117, Placebo oral capsule
Drug
Lead sponsor
Aelis Farma
Industry
Eligibility
21 Years to 60 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 2, 2021 · Synced Oct 20, 2026, 6:15 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Dronabinol Treatment for Marijuana Addiction

NCT00217971
View directory record Official record
Conditions
Marijuana Abuse
Interventions
Dronabinol, Placebo
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 60 Years
Enrollment
156 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Oct 20, 2026, 6:15 PM EDT