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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Completed Phase 2 Interventional Results available

A Study of Tolerability and Efficacy of Cannabidiol on Tremor in Parkinson's Disease

NCT02818777
View directory record Official record
Conditions
Parkinson's Disease
Interventions
cannabidiol
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 80 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 18, 2019 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Results available

Contingency Management of Alcohol Abuse in the Severely Mentally ILL

NCT01567943
View directory record Official record
Conditions
Alcohol Abuse, Schizophrenia, Bipolar Disorder, Major Depressive Disorder
Interventions
Contingency Management
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 65 Years
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 22, 2017 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional

Behavioral Treatment of Drug Abuse in Severe and Persistent Mental Illness (SPMI) Patients

NCT00295139
View directory record Official record
Conditions
Schizophrenia, Mood Disorders, Substance Dependence
Interventions
Behavioral Treatment for Substance Abuse in SPMI (BTSAS), Supportive Treatment in Addiction Recovery (STAR), Critical Time Intervention (CTI)
Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 55 Years
Enrollment
293 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
4
States / cities
Baltimore, Maryland • Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 17, 2022 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Abilify Therapy for Reducing Comorbid Substance Abuse

NCT00208169
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Bipolar Disorder, Major Depressive Disorder, Anxiety Disorders, Substance Abuse
Interventions
Aripiprazole
Drug
Lead sponsor
Creighton University
Other
Eligibility
19 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 23, 2007 · Synced Jun 10, 2026, 10:18 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

I-123 Brain Studies of Serotonin Metabolism in Psychiatric Patients and Normal Volunteers

NCT00001771
View directory record Official record
Conditions
Healthy, Mental Disorder, Obsessive Compulsive Disorder, Schizophrenia, Tourette Syndrome
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
112 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1998 – 2003
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Homeless Youth Study - Stepping Stone 2.0

NCT03776422
View directory record Official record
Conditions
Mental Health Issue (E.G., Depression, Psychosis, Personality Disorder, Substance Abuse)
Interventions
Mobile self-help intervention
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
16 Years to 25 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Family-Skills Training to Prevent Tobacco and Other Substance Use in Latino Youth

NCT01442753
View directory record Official record
Conditions
Tobacco Use Disorder, Alcohol Use Disorder, Drug Use Disorder, Smoking, Alcohol Drinking, Drug Abuse
Interventions
Family-Skills Training
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
Not listed
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 3, 2015 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of Quetiapine in the Treatment of Patients With Schizophrenia and a Comorbid Substance Use Disorder

NCT00156715
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder, Psychotic Disorder, Substance Abuse, Alcohol Abuse
Interventions
Quetiapine
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
4
States / cities
Augusta, Georgia • Lebanon, New Hampshire • Manchester, New Hampshire
Source: ClinicalTrials.gov public record
Updated Mar 13, 2018 · Synced Jun 10, 2026, 10:18 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Assessment of Cannabis Craving in Schizophrenia Using Virtual Reality

NCT01212081
View directory record Official record
Conditions
Cannabis Use
Interventions
Not listed
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jun 10, 2026, 10:18 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Weaving Healthy Families Program

NCT03924167
View directory record Official record
Conditions
Alcohol Abuse, Drug Use, Violence, Domestic, Child Abuse, Diet Modification, Health Behavior, Health Knowledge, Attitudes, Practice, Relationship, Family, Relation, Parent-Child, Emotional Stress
Interventions
Weaving Healthy Families Program
Behavioral
Lead sponsor
Tulane University
Other
Eligibility
5 Years to 120 Years
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 19, 2024 · Synced Jun 10, 2026, 10:18 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Imaging Cannabinoid Receptors Using Positron Emission Tomography (PET) Scanning

NCT01730781
View directory record Official record
Conditions
Schizophrenia, Cannabis Dependence, Prodromal for Psychotic Illness, Family History of Alcoholism, Healthy Control, Opioid-use Disorder, Post Traumatic Stress Disorder
Interventions
[11-C]OMAR
Radiation
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years · Male only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Results available

First Episode Schizophrenia and Cannabis-Related Disorder Study

NCT00573287
View directory record Official record
Conditions
Cannabis-Related Disorder, Substance-Related Disorders, Schizophrenia, Psychotic Disorders
Interventions
clozapine, risperidone
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
17 Years to 45 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
5
States / cities
Concord, New Hampshire • Lebanon, New Hampshire • Manchester, New Hampshire + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2019 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Families With Substance Use and Psychosis: A Pilot Study

NCT04284813
View directory record Official record
Conditions
Psychosis, Substance Use, Substance Use Disorders, Family, Tobacco Use, Nicotine Use Disorder, Cigarette Smoking, Cannabis, Marijuana, Alcohol Use Disorder, Alcohol, Schizophrenia, Schizoaffective Disorder, Bipolar Disorder, Mental Disorder
Interventions
CRAFT-FT
Behavioral
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 11, 2022 · Synced Jun 10, 2026, 10:18 PM 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 Jun 10, 2026, 10:18 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Brain Tissue Collection for Neuropathological Studies

NCT00001260
View directory record Official record
Conditions
Bipolar Disorder, Depression, Anxiety Disorders, Schizophrenia, Tourette's Syndrome, Brain Diseases
Interventions
Not listed
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
2,161 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1990 – 2017
U.S. locations
3
States / cities
Washington D.C., District of Columbia • Bethesda, Maryland • Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Jun 10, 2026, 10:18 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

Combination of Dronabinol and Clonidine for Cannabis Dependence in Patients With Schizophrenia

NCT01598896
View directory record Official record
Conditions
Cannabis Dependence, Marijuana Dependence
Interventions
Dronabinol, Clonidine, Placebo
Drug
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 45 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Phase 2 Interventional Results available

A Study of Tolerability and Efficacy of Cannabidiol on Motor Symptoms in Parkinson's Disease

NCT03582137
View directory record Official record
Conditions
Parkinson Disease
Interventions
Cannabidiol, Placebo
Drug · Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 85 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 22, 2024 · Synced Jun 10, 2026, 10:18 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Brain Imaging in Early Psychosis

NCT03932188
View directory record Official record
Conditions
Mental Health Issue (E.G., Depression, Psychosis, Personality Disorder, Substance Abuse)
Interventions
Mental Health Assessments and Computerized Cognitive Test, MRI scan
Behavioral · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
13 Years to 25 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 24, 2020 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Phase 2 Interventional Results available

Combined Treatment for Alcohol-Dependent Individuals With PTSD

NCT00262223
View directory record Official record
Conditions
Stress Disorders, Post-Traumatic, Alcohol Abuse, Substance-Related Disorders
Interventions
Seeking Safety, Sertraline, Pill placebo
Behavioral · Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 2, 2020 · Synced Jun 10, 2026, 10:18 PM EDT
Not listed Phase 2Phase 3 Interventional

A Comparison of Adolescent Group Therapy and Transitional Family Therapy for Adolescent Alcohol and Drug Abusers

NCT00484367
View directory record Official record
Conditions
Alcohol Abuse, Alcohol Dependence, Cannabis Abuse, Cannabis Dependence, Other Substance Abuse
Interventions
Adolescent group therapy, Transitional family therapy
Behavioral
Lead sponsor
The Morton Center, Inc.
Other
Eligibility
13 Years to 17 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2012
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 25, 2011 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Youth to Text or Telehealth for Engagement in HIV Care

NCT03681145
View directory record Official record
Conditions
HIV/AIDS, Mental Health Issue (E.G., Depression, Psychosis, Personality Disorder, Substance Abuse), Depression, Substance Use
Interventions
Counselor delivered telehealth intervention
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 29 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Testing the Interactive Effects of Delta-9-Tetrahydrocannabinol and Pregnenolone

NCT02576912
View directory record Official record
Conditions
Healthy
Interventions
Active Delta-9-THC, Active Pregnenolone, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 55 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 6, 2023 · Synced Jun 10, 2026, 10:18 PM EDT
Not listed Phase 4 Interventional

Clozapine Versus Olanzapine as Treatment for Comorbid Psychotic Disorder and Substance Use Disorder

NCT03857581
View directory record Official record
Conditions
Psychosis, Substance Use Disorders
Interventions
Clozapine, Olanzapine
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 60 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Evans, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 22, 2020 · Synced Jun 10, 2026, 10:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Iwin: Individual Well-Being Navigator

NCT02823535
View directory record Official record
Conditions
Other Drug Substance Abuse
Interventions
Iwin: Individual Well-Being Navigator
Behavioral
Lead sponsor
Pro-Change Behavior Systems
Other
Eligibility
18 Years to 54 Years
Enrollment
253 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
4
States / cities
Watertown, Massachusetts • Poughkeepsie, New York • South Kingstown, Rhode Island + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Jun 10, 2026, 10:18 PM EDT