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Showing 1–24 of 42 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Harm-Reduction Counseling Clear all
Completed Phase 3 Interventional Accepts healthy volunteers

Family Planning-based Partner Abuse Intervention to Reduce Unintended Pregnancy

NCT01459458
View directory record Official record
Conditions
Violence, Pregnancy
Interventions
Family Planning-based Partner Violence Intervention
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
16 Years to 29 Years · Female only
Enrollment
3,687 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2015
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 1, 2015 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional

Improving Brief Marijuana Interventions With a Behavioral Economic Supplement

NCT02837315
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 Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional

E-cigarettes for Harm Reduction Among Smokers With Serious Mental Illness

NCT05815199
View directory record Official record
Conditions
Cigarette Smoking
Interventions
E-cigarette (EC), Nicotine Replacement Therapy (NRT), Harm-Reduction Counseling, Ecological Momentary Intervention (EMI) Text Messaging
Other · Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 9, 2025 · Synced Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Text-Based Messaging Strategies for Preventing Subsequent Problematic Alcohol Use

NCT06318975
View directory record Official record
Conditions
Alcohol Drinking, Binge Drinking, Text Messaging
Interventions
Brief Alcohol Intervention, Automated and Targeted Text Messages
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
7,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 1 Interventional

Improving Quality-of-life and Depressive Symptoms of Combat Veterans Via Internet-based Intervention

NCT01231711
View directory record Official record
Conditions
Depression, Post-Traumatic Stress Disorder, Functional Status
Interventions
Vets Prevail
Behavioral
Lead sponsor
Prevail Health Solutions, LLC
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 31, 2010 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Switching to a Vaping Device: Evaluating Risk Reduction Among Quitline Treatment Failures

NCT03502200
View directory record Official record
Conditions
Smoking, Cigarette
Interventions
JUUL, Treatment As Usual
Device · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
21 Years to 99 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 20, 2023 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact on Opioid Use of Bundling Medication-assisted Treatment With mHealth

NCT02712034
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
MAT + A-CHESS, MAT
Behavioral · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
417 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 13, 2020 · Synced Sep 5, 2026, 9:04 AM EDT
Active, not recruiting Not applicable Interventional

Counseling for Harm Reduction and Retention in Medication-assisted Treatment - Cherokee Nation

NCT05733442
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
Treatment as usual (TAU), CHaRRM-CN
Other
Lead sponsor
Washington State University
Other
Eligibility
18 Years and older
Enrollment
136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Tahlequah, Oklahoma • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

American Indian and Alaska Native Men Who Have Sex With Men HIV & Substance Abuse Research

NCT03049904
View directory record Official record
Conditions
HIV, Substance Use
Interventions
Vr2L 2Spirit
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older · Male only
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 29, 2018 · Synced Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional

Electronic Cigarettes as a Harm Reduction Strategy Among People With Opioid Use Disorder on Buprenorphine

NCT07202039
View directory record Official record
Conditions
Tobacco-flavored EC, Sweet-Cooling EC, Sweet Non-cooling EC
Interventions
Brief individual counseling sessions
Behavioral
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
21 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 4 Interventional Results available

Extended-release Naltrexone and Care Management for Alcohol Dependent Frequent Emergency Department Users

NCT02445339
View directory record Official record
Conditions
Alcohol Dependence, Alcohol Use Disorder
Interventions
XR-NTX+CM (Extended-Release Naltrexone plus Care Management)
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional

Pharmacist-Led Interventions to Increase Access to Medications for Opioid Use Disorders (PLI-MOUD)

NCT05776823
View directory record Official record
Conditions
Opioid Use Disorder, Overdose
Interventions
Pharmacist Narcan Training, BIRT, SMC, Substance Use Counselor Narcan Training
Behavioral
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older
Enrollment
267 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 1Phase 2 Interventional

Stonewall Treatment Evaluation Project

NCT01129401
View directory record Official record
Conditions
Substance Abuse, HIV Infections
Interventions
Stonewall Project
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Male only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
2
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2014 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional

Electronic Cigarettes as a Harm Reduction Strategy Among Patients With COPD

NCT04465318
View directory record Official record
Conditions
COPD
Interventions
E-cigarette (EC), Nicotine Replacement Therapy (NRT), Smoking Harm Reduction Counseling Sessions
Other · Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years to 75 Years
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 14, 2023 · Synced Sep 5, 2026, 9:04 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Motivational Interviewing to Increase Uptake of Drug Checking and Safe Drug Use Behaviors to Reduce Overdose

NCT06855836
View directory record Official record
Conditions
Overdose
Interventions
MI-CHANCE (TS + FTIR + MI), TS + FTIR + Flu and Hepatitis A Education
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
588 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional

Comprehensive HIV and Harm Prevention Via Telehealth

NCT05897099
View directory record Official record
Conditions
HIV Infections
Interventions
Comprehensive Tele-harm Reduction, Off-site Linkage to HIV Prevention
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
350 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
2
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Randomized Controlled Trial of the Bruthas Project

NCT01270230
View directory record Official record
Conditions
HIV Infection
Interventions
Bruthas Project, Standard HIV Testing and Counseling
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years · Male only
Enrollment
396 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2016 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Results available

Personally-Tailored Opioid-overdose and Medication for Opioid Use Disorder (MOUD) Education (TOME) for Pregnant and Postpartum Persons in MOUD

NCT06262347
View directory record Official record
Conditions
Opioid Use Disorder, Pregnancy Related, Substance Use, Drug Abuse, Drug Abuse in Pregnancy, Drug Addiction
Interventions
Personally-Tailored Opioid-overdose and Medication for opioid use disorder (MOUD) Education (TOME), Control
Behavioral
Lead sponsor
T. John Winhusen, PhD
Other
Eligibility
18 Years and older · Female only
Enrollment
131 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
6
States / cities
Jacksonville, Florida • Pittsburgh, Pennsylvania • Charleston, South Carolina + 3 more
Source: ClinicalTrials.gov public record
Updated May 10, 2025 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Preventing Drug Use in Low Income Clinic Populations

NCT01942876
View directory record Official record
Conditions
Drug Use, Harmful Use
Interventions
Quit Using Drugs Intervention Trial, Health behavior maintenance
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 17, 2016 · Synced Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

STEPS: Substance Use Trial of E-cigarettes or Pharmacotherapy for Smoking

NCT06922617
View directory record Official record
Conditions
Tobacco Use, Substance Use Disorders
Interventions
Switching to E-Cigarette, Quitting using Medication, Counseling
Behavioral · Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
4
States / cities
Charleston, South Carolina • Conway, South Carolina • Greenville, South Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Kentucky Communities and Researchers Engaging to Halt the Opioid Epidemic (CARE2HOPE)

NCT04134767
View directory record Official record
Conditions
Substance Use, HIV Infections, HCV Infection, Sexually Transmitted Infections (Not HIV or Hepatitis), Overdose, Drug, Opioid Use
Interventions
Health Linkage, Overdose Education
Behavioral
Lead sponsor
April M Young
Other
Eligibility
18 Years and older
Enrollment
234 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Dec 20, 2023 · Synced Sep 5, 2026, 9:04 AM EDT
Recruiting Not applicable Interventional

The MOUD Plus Pilot: Counseling and Peer Support to Support Retention for Medically Complex Patients With Opioid Use Disorder Seen In Primary Care

NCT06837662
View directory record Official record
Conditions
Opioid Dependence, Substance Abuse Disorders, Complex Medical Patients, Primary Care Patients With Chronic Conditions
Interventions
MOUD "Plus" Intervention (treatment as usual + coordinated counseling and referral to community based peer), Treatment As Usual (primary care with low threshold MOUD prescribing)
Behavioral
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Alcohol Health Education With Personalized Feedback Boosters

NCT03440463
View directory record Official record
Conditions
College Student Drinking
Interventions
e-checkup to go, Norms-only booster, Norms-plus-Strategies booster
Behavioral
Lead sponsor
Abby Braitman
Other
Eligibility
18 Years to 24 Years
Enrollment
528 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 21, 2023 · Synced Sep 5, 2026, 9:04 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Single-Session Intervention Targeting Self-Injurious Behavior in Adolescents

NCT04498143
View directory record Official record
Conditions
Nonsuicidal Self Injury, Self Hatred, Suicidal Thoughts, Suicide Attempts
Interventions
Project SAVE ("Stop Adolescent Violence Everywhere") SSI, Active Comparator: Supportive Therapy ("Share Your Feelings") SSI
Other
Lead sponsor
University of Denver
Other
Eligibility
13 Years to 16 Years
Enrollment
565 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Sep 5, 2026, 9:04 AM EDT