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ClinicalTrials.gov public records Last synced May 22, 2026, 1:34 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 91 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Marijuana Smoking Clear all
Completed Not applicable Interventional
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 May 22, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Alcohol Drinking, Marijuana
Interventions
Text Messaging and Brief Negotiation Interview
Behavioral
Lead sponsor
Yale University
Other
Eligibility
13 Years to 18 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 22, 2018 · Synced May 22, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Alcohol Use, Marijuana Use, Sexually Transmitted Infections
Interventions
motivational intervention, health education
Behavioral
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years to 25 Years
Enrollment
566 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Sep 17, 2017 · Synced May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Cannabis, HIV, Inflammation, Cognition, Neuroimaging
Interventions
Multimodal, multi-parametric MRI, Immune and cytokine profiling, Neuropsychological testing
Other · Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
25 Years to 59 Years
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced May 22, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 May 22, 2026, 1:34 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Vaping, Adolescent, Electronic Cigarette Use, Nicotine, Cannabis
Interventions
Vaping Device Labeling
Other
Lead sponsor
University of Southern California
Other
Eligibility
11 Years to 19 Years
Enrollment
3,900 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced May 22, 2026, 1:34 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Malignant Neoplasm
Interventions
Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Gilbert, Arizona • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 29, 2019 · Synced May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
THC, Cannabis, Cannabis Smoking, Cannabis Use, Unspecified, Cigarette Smoking, Tobacco Use, Nicotine Dependence, Nicotine Withdrawal, Cardiovascular Risk Factor
Interventions
Smoked Cannabis, Vaped Cannabis, Tobacco Cigarette
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years and older
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 30, 2024 · Synced May 22, 2026, 1:34 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Behavioral Economics, Cannabis Smoking, Tobacco Smoking
Interventions
Cue Reactivity
Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years to 25 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Chronic Pain
Interventions
Eccentric Biceps Flexion, Concentric Biceps Flexion
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 65 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced May 22, 2026, 1:34 AM EDT
Completed Phase 4 Interventional Results available
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 May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Marijuana Use
Interventions
Brief Motivational Intervention (BMI), Substance-Free Activity Session (SFAS), Relaxation Session
Behavioral
Lead sponsor
University of Memphis
Other
Eligibility
18 Years and older
Enrollment
133 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced May 22, 2026, 1:34 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Youth With HIV
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
21 Years to 28 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
2
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 12, 2023 · Synced May 22, 2026, 1:34 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
THC, Cannabis, Cannabis Use, Cannabis Smoking, Tobacco Use, Vaping
Interventions
Cannabis, Nicotine, Pax Loose Leaf Vaporizer, Placebo Marijuana
Drug · Device · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional
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 May 22, 2026, 1:34 AM EDT
Completed Not applicable Interventional Results available
View directory record Official record
Conditions
Substance Use Disorders
Interventions
Intensive Outpatient Treatment (IOP) + Contingency Management (CM), Working Memory Training
Behavioral
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
12 Years to 26 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 3, 2021 · Synced May 22, 2026, 1:34 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available
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 May 22, 2026, 1:34 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Marijuana Smoking
Interventions
Marijuana, Quetiapine, Placebo oral capsule
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 17, 2017 · Synced May 22, 2026, 1:34 AM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Cigarette Smoking-Related Carcinoma
Interventions
Non-Interventional Study
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years to 30 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced May 22, 2026, 1:34 AM EDT
Not listed Not applicable Interventional
View directory record Official record
Conditions
Marijuana Use, Marijuana Dependence, Tobacco Use, Alcohol Use, Unspecified
Interventions
Domain-Specific Episodic Future Thinking
Behavioral
Lead sponsor
Michael Sofis
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Sudbury, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 11, 2022 · Synced May 22, 2026, 1:34 AM EDT
Not yet recruiting Not applicable Interventional
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 Mar 23, 2026 · Synced May 22, 2026, 1:34 AM EDT