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ClinicalTrials.gov public records Last synced Sep 30, 2026, 6:57 AM EDT

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Showing 25–48 of 48 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Low THC marijuana Clear all
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 7, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Vaporized Cannabis Administration and Co-Administration of Alcohol on Impairment

NCT06293040
View directory record Official record
Conditions
Cannabis Intoxication, Alcohol Intoxication
Interventions
Cannabis, Alcohol, Placebo Cannabis, Placebo Alcohol
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Examine the Feasibility of a Standardized Field Test for Marijuana Impairment: Laboratory Evaluations

NCT03191084
View directory record Official record
Conditions
Marijuana Impairment
Interventions
Low Dose THC Marijuana, High Dose THC Marijuana, Placebo Marijuana
Drug
Lead sponsor
Yale University
Other
Eligibility
20 Years to 40 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Effect of Cannabis on Cigarette Use Behavior

NCT06609083
View directory record Official record
Conditions
Cannabis Use, Tobacco Use, Cigarette Smoking
Interventions
THC 30mg, THC 5mg, THC 0mg, Cigarette Full Nicotine, Cigarette Reduced Nicotine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 16, 2026 · Synced Sep 30, 2026, 6:57 AM 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 Sep 30, 2026, 6:57 AM EDT
Recruiting Not applicable Interventional

Testing Warning Labels for Retail Cannabis Products Using a Discrete Choice Experiment

NCT07701304
View directory record Official record
Conditions
Cannabis Use, Risk Perception, Decision Making
Interventions
Discrete choice experiment (DCE) survey-experiment
Behavioral
Lead sponsor
University of Oklahoma
Other
Eligibility
21 Years and older
Enrollment
450 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Age-dependent Effects of Smoked and Oral Delta-9-THC

NCT05865470
View directory record Official record
Conditions
Pain, Abuse, Drug, Intoxication; Cannabinoids
Interventions
Cannabis, Dronabinol, Smoked Placebo, Oral Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 65 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Sep 30, 2026, 6:57 AM 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 14, 2018 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 2 Interventional

PAIN: A Project Assessing the Impact of a Novel Cannabinoid Product

NCT03984565
View directory record Official record
Conditions
Chronic Pain
Interventions
Cannabidiol, Placebo
Drug
Lead sponsor
Staci Gruber, Ph.D.
Other
Eligibility
21 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Suspended Phase 2 Interventional Accepts healthy volunteers

Repeated Administration of Cannabis Varying in THC and CBD

NCT05563948
View directory record Official record
Conditions
Cannabis
Interventions
Cannabis
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
21 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2034
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 30, 2026, 6:57 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 12, 2023 · Synced Sep 30, 2026, 6:57 AM 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 17, 2024 · Synced Sep 30, 2026, 6:57 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Cannabinoids, Neural Synchrony, and Information Processing

NCT00708994
View directory record Official record
Conditions
Cannabis, Psychotic Disorders
Interventions
THC, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 9, 2022 · Synced Sep 30, 2026, 6:57 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 28, 2008 · Synced Sep 30, 2026, 6:57 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Effects of Vaporized Marijuana on Neuropathic Pain

NCT01037088
View directory record Official record
Conditions
Neuropathic Pain, Reflex Sympathetic Dystrophy, Peripheral Neuropathy, Post-herpetic Neuralgia, Spinal Cord Injury, Multiple Sclerosis
Interventions
Mild dose cannabis, Low dose cannabis, Cannabis
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 70 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 31, 2018 · Synced Sep 30, 2026, 6:57 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Vaporized Cannabis and Spinal Cord Injury Pain

NCT01555983
View directory record Official record
Conditions
Spinal Cord Injuries, Spinal Cord Diseases
Interventions
Vaporization of Cannabis
Drug
Lead sponsor
Barth Wilsey
Other
Eligibility
18 Years to 70 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Mather, California
Source: ClinicalTrials.gov public record
Updated Apr 18, 2017 · Synced Sep 30, 2026, 6:57 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Ethanol and Cannabinoid Effects on Simulated Driving and Related Cognition: Sub-Study I

NCT02709954
View directory record Official record
Conditions
Cannabis, Alcohol Effect, Driving Under the Influence of Alcohol and Other Drugs
Interventions
Active inhaled delta-9-THC, Placebo, Active Oral Ethanol
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2026
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Sep 30, 2026, 6:57 AM 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 Sep 30, 2026, 6:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cannabis Impairment Detection Application (CIDA)

NCT04230460
View directory record Official record
Conditions
Driving Under the Influence, Marijuana Intoxication, Alcohol Intoxication
Interventions
Cannabis (THC) (Inhaled) Placebo, Cannabis (High% THC) (Inhaled), Cannabis (Very High% THC) (Inhaled), Alcohol (oral)
Drug
Lead sponsor
Advanced Brain Monitoring, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 12, 2021 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Effect of Cannabis on E-Cigarette Use Behavior

NCT06609109
View directory record Official record
Conditions
Cannabis Use, Tobacco Use, Electronic Cigarette Use
Interventions
THC High Dose, THC Low Dose, THC 0mg, E-Cigarette Full Nicotine, E-Cigarette Placebo Nicotine
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 9, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Analgesic and Subjective Effects of Terpenes

NCT04451863
View directory record Official record
Conditions
Pain, Abuse, Drug
Interventions
Low THC, High THC, Low Myrcene, High Myrcene, Low Beta-Caryophyllene, High Beta-Caryophyllene, Placebo
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 55 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

The Effects of Cannabis on Male Reproductive Functions

NCT06755346
View directory record Official record
Conditions
Male Reproductive Problem
Interventions
Cannabis plant (THC 20mg), Cannabis (0%/ THC / 0% CBD), Cannabis plant (THC 40mg)
Drug
Lead sponsor
Kanako Hayashi
Other
Eligibility
21 Years to 64 Years · Male only
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Pullman, Washington
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Cannabis Effects as a Function of Sex

NCT04385082
View directory record Official record
Conditions
Pain, Abuse, Drug
Interventions
Active Cannabis, Placebo Cannabis
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
21 Years to 55 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Sep 30, 2026, 6:57 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Pregnenolone as a Treatment for Cannabis Intoxication

NCT07216690
View directory record Official record
Conditions
Cannabis Intoxication
Interventions
Cannabis, Pregnenolone 250 mg, Pregnenolone 500 mg, Placebo, Placebo brownie
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Sep 30, 2026, 6:57 AM EDT