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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: harm reduction intervention Clear all
Recruiting Phase 2Phase 3 Interventional Accepts healthy volunteers

Naltrexone for Overdose Prevention

NCT06633900
View directory record Official record
Conditions
Overdose Accidental
Interventions
IM naltrexone, Usual Care
Drug · Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Trial of a Harm Reduction Strategy for People With HIV Who Smoke Cigarettes

NCT05642715
View directory record Official record
Conditions
Hiv, Tobacco Use
Interventions
EX+, Varenicline, HR, TAU
Behavioral · Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
40 Years to 79 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Project POINT: Effectiveness and Scalability of an Overdose Survivor Intervention

NCT03336268
View directory record Official record
Conditions
Substance Use Disorders, Overdose
Interventions
POINT
Behavioral
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
249 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
2
States / cities
Indianapolis, Indiana • Muncie, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional

Addressing Risk Through Community Treatment for Infectious Disease and Opioid Use Disorder Now (ACTION) Among Justice-involved Populations

NCT05286879
View directory record Official record
Conditions
Opioid Use Disorder, Infectious Disease, Risk Reduction Behavior, Substance Use, Substance Abuse, Stimulant Use Disorder
Interventions
Patient Navigator, Mobile Health Unit
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
601 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
3
States / cities
New Haven, Connecticut • Dallas, Texas • Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional

Retention and Re-Engagement in Treatment for Addiction Following Serious Injection Related Infections (RETAIN)

NCT06489535
View directory record Official record
Conditions
Opioid Use Disorder, Bloodstream Infection, Osteomyelitis, Endocarditis, Septic Arthritis, Epidural Abscess
Interventions
RETAIN, Unrelated videos
Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Innovating Technology Solutions for Residents in Support Housing Communities w SUD Through Community-Engaged Research

NCT07001020
View directory record Official record
Conditions
Housing Problems, Household Substance Abuse, Substance Use Disorders, Harm Reduction
Interventions
Technology-based Intervention
Behavioral
Lead sponsor
Oregon Research Behavioral Intervention Strategies, Inc.
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Springfield, Oregon
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Recruiting Not applicable Interventional

Adaptive Interventions for Emergency Department Patients With Opioid Use Disorder

NCT06827288
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
SUN, SUN + Telebridge, ED-ITT, ED-ITT + BHS
Behavioral
Lead sponsor
RAND
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Colton, California
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Not yet recruiting Not applicable Interventional

A Social Network Approach to Improve HIV Prevention and Substance Use Treatment For People Who Use Drugs

NCT07409350
View directory record Official record
Conditions
Substance Use, HIV Prevention
Interventions
LINKED, Group Intervention
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
398 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2028
U.S. locations
3
States / cities
Los Angeles, California • Chicago, Illinois • New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Withdrawn Phase 4 Interventional

Elimination of HCV Through Linkage and In Prison Treatment of Incarcerated Populations (ECLIPSE)

NCT04235049
View directory record Official record
Conditions
HCV Infection
Interventions
Glecaprevir/pibrentasvir
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 5, 2021 · Synced Sep 18, 2026, 9:54 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 Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Rapid Self-Testing to Prevent Fentanyl Overdose Among Young People Who Use Drugs

NCT03373825
View directory record Official record
Conditions
Accidental Overdose of Opiate
Interventions
Take home rapid drug test
Behavioral
Lead sponsor
Brown University
Other
Eligibility
18 Years to 35 Years
Enrollment
93 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional

Evaluation of a Novel Intervention to Prevent Polysubstance Overdoses Involving Illicit Stimulants

NCT05493475
View directory record Official record
Conditions
Opiate Overdose, Fentanyl Overdose, Harm Reduction
Interventions
Fentanyl Test Strips
Behavioral
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
18 Years and older
Enrollment
653 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Emergency Medicine Peer Outreach Worker Engagement for Recovery

NCT06320015
View directory record Official record
Conditions
Substance Use Disorders, Overdose, Opioid Use Disorder, Alcohol Use Disorder
Interventions
Substance Misuse Assistance Response Team (SMART), Usual Care Group
Behavioral · Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Oct 5, 2025 · Synced Sep 18, 2026, 9:54 AM EDT
Active, not recruiting Not applicable Interventional

Evaluating an Intervention to Prevent Overdoses in Rural and Urban Counties

NCT05463341
View directory record Official record
Conditions
Opiate Overdose, Fentanyl Overdose, Harm Reduction
Interventions
Fentanyl Test Strips
Behavioral
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
18 Years and older
Enrollment
2,400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 27, 2026 · Synced Sep 18, 2026, 9:54 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 18, 2026, 9:54 AM EDT
Completed Phase 1Phase 2 Interventional

Timing Personalized Feedback After Alcohol Health Education

NCT04453007
View directory record Official record
Conditions
College Student Drinking
Interventions
e-checkup to go, Feedback booster
Behavioral
Lead sponsor
Abby Braitman
Other
Eligibility
18 Years to 24 Years
Enrollment
195 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated May 2, 2023 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Brief Web-Based Alcohol Reduction Intervention for Undergraduates

NCT01694082
View directory record Official record
Conditions
Alcohol Use, Heavy Drinking, Negative Consequences of Alcohol Use
Interventions
THRIVE, Brief brochure and assessment control
Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 24 Years
Enrollment
207 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 15, 2014 · Synced Sep 18, 2026, 9:54 AM EDT
Not yet recruiting Not applicable Interventional

Pilot Study of an Adapted Partner Navigation Intervention Booster Session for Sustained Healthcare Engagement Among People Who Inject Drugs

NCT07631559
View directory record Official record
Conditions
HEPATITIS C (HCV), Opioid Use Disorder, Substance Use Disorder (SUD), Drug Use Disorders, Healthcare Access, Harm Reduction
Interventions
Partner navigation intervention booster session
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Developing a PrEP Adherence Intervention Targeting At-Risk and Substance Using Women

NCT04396678
View directory record Official record
Conditions
HIV/AIDS
Interventions
PrEP standard of care+behavioral intervention
Behavioral
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years and older · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 30, 2021 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Interactive Program for Effective Playground Supervision

NCT01094236
View directory record Official record
Conditions
Behavior
Interventions
On the Playground behavior management program
Behavioral
Lead sponsor
Oregon Center for Applied Science, Inc.
Industry
Eligibility
18 Years and older
Enrollment
2,316 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 25, 2010 · Synced Sep 18, 2026, 9:54 AM EDT
Not yet recruiting Not applicable Interventional

The Community Paramedic Response and Overdose Outreach With Supportive Medical-Legal Services Study

NCT07216963
View directory record Official record
Conditions
Opioid Use Disorder, Overdose, Drug, Overdose, Substance Use (Drugs, Alcohol)
Interventions
Community Paramedic Standard of Care (CP SOC), CROSSROADS
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
4
States / cities
Miami, Florida • Boston, Massachusetts • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 18, 2026, 9:54 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 18, 2026, 9:54 AM EDT
Recruiting Not applicable Interventional

Clinical Research Evaluating Smoking Cessation With E-Cigarettes and Nicotine Therapy

NCT06948058
View directory record Official record
Conditions
Smoking Cessation, Obesity and Obesity-related Medical Conditions
Interventions
Electronic Cigarettes (EC), Nicotine replacement therapy (NRT)
Other
Lead sponsor
Brown University
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced Sep 18, 2026, 9:54 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Evaluation of Oral Tobacco as a Harm Reduction Method for Smokers

NCT00711100
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Camel Snus, Marlboro Snus, Stonewall, Ariva, General Snus
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
2
States / cities
Minneapolis, Minnesota • Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 17, 2019 · Synced Sep 18, 2026, 9:54 AM EDT