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Showing 1–24 of 74 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: marijuana cigarette Clear all
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 Sep 28, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Social Media Intervention to Stop Nicotine and Cannabis Vaping Among Adolescents

NCT04707911
View directory record Official record
Conditions
Vaping
Interventions
Social Media Intervention
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
13 Years to 21 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 20, 2024 · Synced Sep 28, 2026, 8:27 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 4, 2022 · Synced Sep 28, 2026, 8:27 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Guiding Good Choices for Health

NCT04040153
View directory record Official record
Conditions
Adolescent Substance Use
Interventions
Guiding Good Choices
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
11 Years to 12 Years
Enrollment
3,636 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2025
U.S. locations
3
States / cities
Oakland, California • Aurora, Colorado • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 2, 2024 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

THC Crossover Study

NCT04429568
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 Sep 28, 2026, 8:27 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Understanding the Clinical Pharmacology of Marijuana-Tobacco Co-administration

NCT05999383
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 Sep 28, 2026, 8:27 PM EDT
Completed No phase listed Observational Results available

Brain Nicotine Receptor Density in Veteran Smokers

NCT01721473
View directory record Official record
Conditions
Positron Emission Tomography
Interventions
positron emission tomography scan
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 65 Years
Enrollment
184 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
2
States / cities
San Diego, California • West Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 6, 2019 · Synced Sep 28, 2026, 8:27 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

E-cigarette Cessation in Adults Who Co-use Cannabis

NCT06688539
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Use Disorder
Interventions
Varenicline Pill, Contingency management, Counseling
Drug · Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 40 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
3
States / cities
Charleston, South Carolina • Lancaster, South Carolina • Pickens, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 28, 2026, 8:27 PM 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 Sep 28, 2026, 8:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Low-dose Naltrexone in Combination With a Range of Smoked Marijuana

NCT00743145
View directory record Official record
Conditions
Marijuana Smoking
Interventions
Inactive Marijuana (0% THC), Active Marijuana (5.5% THC), Active Marijuana (6.2% THC), Naltrexone, Placebo naltrexone
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 45 Years
Enrollment
23 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 Sep 13, 2018 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Not applicable Interventional Results available

Mobile Contingency Management for Marijuana and Tobacco Cessation

NCT02869451
View directory record Official record
Conditions
Cigarette Smoking, Marijuana Abuse
Interventions
bupropion, transdermal nicotine patch, Nicotine polacrilex, nicotine lozenge, counseling for marijuana and smoking cessation, mobile contingency management
Drug · Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years to 70 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 6, 2020 · Synced Sep 28, 2026, 8:27 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 28, 2023 · Synced Sep 28, 2026, 8:27 PM 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

NCT03107936
View directory record Official record
Conditions
Smoking
Interventions
smokeSCREEN game
Behavioral
Lead sponsor
Yale University
Other
Eligibility
10 Years to 16 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
4
States / cities
Hamden, Connecticut • New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 18, 2018 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Comparison Between Marijuana Smoked in Cigarette Paper Versus Cigar Paper

NCT00374127
View directory record Official record
Conditions
Marijuana Dependence
Interventions
Marijuana blunt, marijuana cigarette
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 45 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 31, 2017 · Synced Sep 28, 2026, 8:27 PM 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 Sep 28, 2026, 8:27 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Eye Tracking as a Biomarker of Cannabis Effects

NCT04100590
View directory record Official record
Conditions
Cannabis Use, Pain, Acute
Interventions
Cannabis
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 55 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 29, 2022 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Behavioral Pharmacology of Cannabis and Nicotine

NCT04124432
View directory record Official record
Conditions
Cannabis, Nicotine
Interventions
Cannabis, Nicotine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 55 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 16, 2024 · Synced Sep 28, 2026, 8:27 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Mapping Brain Glutamate in Humans: Sex Differences in Cigarette Smokers

NCT05279053
View directory record Official record
Conditions
Sex, Cigarette Smoking
Interventions
Abstinence and Smoking
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 45 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 19, 2026 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effect of Quetiapine on Marijuana Withdrawal and Relapse

NCT00743366
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 Sep 28, 2026, 8:27 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Virtual Reality Game to Prevent E-cigarette and Cannabis Vaping

NCT07413432
View directory record Official record
Conditions
Cannabis, Vaping, Emotion Regulation
Interventions
Virtual reality videogame intervention for vaping prevention
Behavioral
Lead sponsor
Yale University
Other
Eligibility
11 Years to 15 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 28, 2026, 8:27 PM 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 Sep 28, 2026, 8:27 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Acute Effects of Cannabis on Cognition and Mobility in Older HIV-infected and HIV-Un-infected Women

NCT03633721
View directory record Official record
Conditions
HIV, AIDS, Aging
Interventions
Cannabis, Placebo
Drug · Other
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Sep 28, 2026, 8:27 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Cannabis and Schizophrenia: Self-Medication and Agonist Treatment

NCT00946348
View directory record Official record
Conditions
Schizophrenia, Dual Diagnosis, Schizoaffective Disorder, Psychotic Disorder, Cannabis Use Disorder
Interventions
Dronabinol, Cannabis
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 11, 2021 · Synced Sep 28, 2026, 8:27 PM 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 Sep 28, 2026, 8:27 PM EDT