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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Substance Abuse Disorders Clear all
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 23, 2026, 3:41 AM EDT
Completed Phase 2 Interventional

Culturally Informed Family Based Treatment of Adolescents: A Randomized Trial

NCT01823250
View directory record Official record
Conditions
Substance Use Disorders, Risk Behavior, Psychiatric Disorders, Family Dysfunction
Interventions
Family Therapy based on Structural Family Therapy, Group Therapy, Psychoeducational Sessions, Individual Adolescent Therapy Sessions
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
14 Years to 17 Years
Enrollment
190 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Jul 23, 2026, 3:41 AM EDT
Completed No phase listed Observational

Developing Field Tools for Real-Time Assessment of Exposure to Psychosocial Stress and Drug Use in an Outpatient Treatment Population

NCT00787423
View directory record Official record
Conditions
Stress, Drug Abuse
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years and older
Enrollment
373 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Abuse Liability of Reduced Nicotine Content Cigarettes in the Context of Concurrent E-Cigarette Use

NCT02870218
View directory record Official record
Conditions
Nicotine Addiction, Cigarette Smoking
Interventions
Smoking research cigarettes with e-cigarette, Nicotine discrimination thresholds
Drug
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
2
States / cities
Charlotte, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 13, 2022 · Synced Jul 23, 2026, 3:41 AM EDT
Terminated Early Phase 1 Interventional

Reducing the Abuse of Opioids in Drug Users

NCT03837860
View directory record Official record
Conditions
Opioid Abuse, Unspecified, Opioid Dependence
Interventions
Oxycodone/Placebo, Oxycodone/Risperidone, Oxycodone/Ziprasidone
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
21 Years to 65 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Feb 14, 2022 · Synced Jul 23, 2026, 3:41 AM EDT
Recruiting Not applicable Interventional

Implementation of Tobacco Cessation Programming at Community Behavioral Health Sites

NCT06837220
View directory record Official record
Conditions
Nicotine Use Disorder, Smoking Cessation, Smoking Cessation Intervention
Interventions
Enhanced Courage to Quit
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 26 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 6, 2026 · Synced Jul 23, 2026, 3:41 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 23, 2026, 3:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Enhancing Housing First Programs With a Social Network Substance Use Intervention

NCT02140359
View directory record Official record
Conditions
Alcohol Drinking, Drug Abuse, HIV
Interventions
Motivational Network Interview
Behavioral
Lead sponsor
RAND
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
2
States / cities
Los Angeles, California • Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Nov 23, 2017 · Synced Jul 23, 2026, 3:41 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 23, 2026, 3:41 AM EDT
Completed Phase 4 Interventional Results available

Dutasteride Treatment for the Reduction of Heavy Drinking in Men

NCT01758523
View directory record Official record
Conditions
Alcoholism, Alcohol Abuse, Alcohol Dependence
Interventions
Dutasteride, sugar pill
Drug
Lead sponsor
UConn Health
Other
Eligibility
18 Years to 70 Years · Male only
Enrollment
189 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Farmington, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Jul 23, 2026, 3:41 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Abuse Liability and Appeal of Oral Nicotine Products

NCT06506162
View directory record Official record
Conditions
Nicotine Dependence
Interventions
Flavor, Nicotine concentration
Other
Lead sponsor
University of Southern California
Other
Eligibility
21 Years to 25 Years
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Jul 23, 2026, 3:41 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 23, 2026, 3:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Perceptions of Vaping Products

NCT06868368
View directory record Official record
Conditions
Abuse Tobacco, Exposure
Interventions
Biospecimen Collection, Survey Administration, Vaping Topography, Participant's Own Preferred E-cigarette, Nicotine E-cigarette, 6-methyl-nicotine (metatine) e-cigarette
Other · Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 34 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 21, 2025 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Not applicable Interventional Results available

A Randomized Trial of Vaccine Adherence in Young Injection Drug Users

NCT00244374
View directory record Official record
Conditions
Medication Adherence, Substance Abuse, Intravenous, Risk Behavior, Hepatitis A, Hepatitis B, Hepatitis C
Interventions
Hepatitis A & B vaccine, Outreach, AIC, SEP
Biological · Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
14 Years to 29 Years
Enrollment
546 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 29, 2013 · Synced Jul 23, 2026, 3:41 AM EDT
Completed No phase listed Observational

Health Behavior in School-Age Children: NEXT Longitudinal Study 2009-2016

NCT01031160
View directory record Official record
Conditions
Adolescent Health
Interventions
Not listed
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
15 Years to 22 Years
Enrollment
4,902 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Jul 23, 2026, 3:41 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 23, 2026, 3:41 AM EDT
Not yet recruiting Not applicable Interventional

Combining Social Network Strategies and Routine Substance Use Screening

NCT07414459
View directory record Official record
Conditions
HIV, Substance Use Disorder (SUD)
Interventions
Substance use disorder screening, Social network intervention
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older · Male only
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Jul 23, 2026, 3:41 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 23, 2026, 3:41 AM EDT
Completed Not applicable Interventional

Stage III Community-based Efficacy Trial for Mothering From the Inside Out

NCT02955199
View directory record Official record
Conditions
Addiction, Substance Abuse Drug Chronic, Child Neglect, Child Neglect Emotional, Child Abuse, Parenting, Parent-Child Problem, Parent-Child Relations, Parent / Child Problem, Parenteral Drug Abuse, Parents
Interventions
Mothering From the Inside Out (MIO), Parent Education
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 13, 2021 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Hispanic Men Building Respect Education and Safety/ HoMBRES Manteniendo Respeto, Educacion y Seguridad.

NCT03730987
View directory record Official record
Conditions
Substance Abuse, Domestic Violence, HIV/AIDS
Interventions
HoMBReS intervention, Families Talking Together (FTT), Diabetes Prevention Intervention
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older · Male only
Enrollment
244 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 16, 2022 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Remote Brief Intervention and Referrals to Treatment Service for Alcohol

NCT02622984
View directory record Official record
Conditions
Alcohol Abuse, Alcohol Dependence
Interventions
RBIRT, SBIRT
Behavioral
Lead sponsor
Polaris Health Directions
Industry
Eligibility
18 Years and older
Enrollment
330 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 9, 2021 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Phase 2 Interventional

Behavior Change and Maintenance Intervention for HIV+ MSM Methamphetamine Users

NCT00432926
View directory record Official record
Conditions
HIV Infections, Substance Abuse, Sexually Transmitted Diseases
Interventions
EDGE counseling, no maintenance, EDGE counseling, plus maintenance, Attention control
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older · Male only
Enrollment
429 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2012 · Synced Jul 23, 2026, 3:41 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Familias Unidas: Preventing Substance Abuse in Hispanic Youth

NCT01038206
View directory record Official record
Conditions
Prevention, Family Function, Substance Use, Sexual Behavior
Interventions
Familias Unidas
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
12 Years and older
Enrollment
746 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 2, 2015 · Synced Jul 23, 2026, 3:41 AM EDT
Completed No phase listed Observational

Improving Identification of Social Harm Among Substance Abusers in HIV Trials

NCT02148276
View directory record Official record
Conditions
Social Harms in Substance Users in HIV Trials, Audio Computer Assisted Self-administered Questionnaire
Interventions
Not listed
Lead sponsor
Treatment Research Institute
Other
Eligibility
18 Years and older
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced Jul 23, 2026, 3:41 AM EDT