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Showing 1–24 of 123 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Harm Reduction Clear all
Completed Not applicable Interventional

Tele-Harm Reduction

NCT05208697
View directory record Official record
Conditions
IV Drug Usage, HIV Infections, Hepatitis C
Interventions
Tele-Harm Reduction, off-site linkage
Behavioral · Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
3
States / cities
Fort Lauderdale, Florida • Miami, Florida • Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cannabis Observational Study on Mood, Inflammation, and Cognition

NCT03522103
View directory record Official record
Conditions
Inflammation, Inflammatory Response, Mood, Cognitive Change
Interventions
Not listed
Lead sponsor
University of Colorado, Denver
Other
Eligibility
21 Years to 70 Years
Enrollment
421 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 11, 2021 · Synced Jul 21, 2026, 11:24 AM EDT
Active, not recruiting Not applicable Interventional

Peer Engagement in Methamphetamine Harm-Reduction With Contingency Management (PEER-CM)

NCT05700994
View directory record Official record
Conditions
Methamphetamine Abuse
Interventions
Peer Contingency Management, Standard of Care Contingency Management
Behavioral
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 105 Years
Enrollment
1,283 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Trial for Harm Reduction With Incentives & Vaping E-cigarettes

NCT06111053
View directory record Official record
Conditions
Obesity, Smoking Cessation
Interventions
ENDS, CI, No ENDS, NI
Other
Lead sponsor
Brown University
Other
Eligibility
21 Years to 99 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Nov 17, 2024 · Synced Jul 21, 2026, 11:24 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Kentucky Outreach Service Kiosk (KyOSK): Reducing HIV, HCV, and Overdose Risk

NCT05657106
View directory record Official record
Conditions
Opioid-Related Disorders, Hepatitis C (HCV), Human Immunodeficiency Virus (HIV), Drug Overdose, Substance Abuse, Intravenous Drug Usage, Opiate Substitution Treatment, Sexually Transmitted Diseases
Interventions
Harm reduction kiosk
Behavioral
Lead sponsor
April M Young
Other
Eligibility
18 Years and older
Enrollment
752 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Jul 21, 2026, 11:24 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 Jul 21, 2026, 11:24 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Electronic Cigarettes as a Harm Reduction Strategy in Individuals With Substance Use Disorder

NCT04063267
View directory record Official record
Conditions
Cigarette Smoking, Addiction, E Cig Use
Interventions
E cigarettes, Nicotine Replacement Therapy
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 19, 2024 · Synced Jul 21, 2026, 11:24 AM EDT
Recruiting Phase 2 Interventional

E-Cigarettes for Harm Reduction in Smokers With Opioid Use Disorder

NCT05722561
View directory record Official record
Conditions
Opioid Use Disorder, Cigarette Smoking
Interventions
Telehealth Motivational Counseling, Nicotine Replacement Product, National Institute on Drug Abuse (NIDA) Standardized Research Electronic Cigarette (SREC).
Behavioral · Drug · Device
Lead sponsor
NYU Langone Health
Other
Eligibility
21 Years to 75 Years
Enrollment
302 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
New York, New York • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Results available

Switching to Potential Reduced Exposure Products in Adult Smokers

NCT04250727
View directory record Official record
Conditions
Tobacco Use Disorder, Oral Nicotine Pouch Use, Smoking Behaviors, Harm Reduction, Toxic Effect of Tobacco and Nicotine, Carcinogenesis
Interventions
ZYN
Device
Lead sponsor
Yale University
Other
Eligibility
21 Years to 77 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Jul 21, 2026, 11:24 AM EDT
Not yet recruiting Not applicable Interventional

Prescribe to Prevent HIV: A Hybrid Trial Helping Addiction Clinics Prevent HIV & Infections Through Safer Drug Use Support

NCT07073924
View directory record Official record
Conditions
People Who Use Opioids/People With Opioid Use Disorder (OUD)
Interventions
Implementation strategy bundle
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
536 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
4
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional

School Health Center Healthy Adolescent Relationship Program

NCT01678378
View directory record Official record
Conditions
Adolescent Relationship Abuse
Interventions
SHARP Intervention
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
14 Years to 19 Years
Enrollment
1,012 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Apr 26, 2015 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional

Life Enhancing Alcohol-management Program

NCT04302740
View directory record Official record
Conditions
Alcohol Use, Unspecified, Homelessness, Harm Reduction, Community Based Participatory Research
Interventions
LEAP
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
21 Years and older
Enrollment
161 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 28, 2025 · Synced Jul 21, 2026, 11:24 AM EDT
Recruiting Not applicable Interventional

A Randomized Clinical Trial of a Novel Drug Education and Diversion Program (iDECIDE) for Middle and High School Students

NCT06115746
View directory record Official record
Conditions
Substance Use, Harm Reduction, Adolescent Behavior
Interventions
iDECIDE
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
9 Years to 22 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Jul 21, 2026, 11:24 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 Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Usability Assessment of Naloxone Administration by Untrained Community Members

NCT04025671
View directory record Official record
Conditions
Harm Reduction, Opioid-use Disorder, Naloxone
Interventions
Nasal Spray Naloxone, Intramuscular Naloxone, Improvised Nasal Atomizer
Device
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years and older
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jul 18, 2019 · Synced Jul 21, 2026, 11:24 AM EDT
Recruiting Phase 2Phase 3 Interventional

Alcohol Use Disorder and Cannabidiol

NCT05613608
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Cannabidiol, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
21 Years and older
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Results available

Quit or Switch: E-cigarette Study

NCT05525078
View directory record Official record
Conditions
Tobacco Use
Interventions
e-cigarette, Nicotine patch, Nicotine lozenge
Behavioral · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Jul 21, 2026, 11:24 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 Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Group-based Intervention for Club Patrons

NCT03652688
View directory record Official record
Conditions
Drink Too Much, Drinking, Binge, Drunk, Drug Use, Aggression, Aggression Sexual, Peer Group, Safety Issues, Harm Reduction
Interventions
Nightlife Safety Plans (NSP), Fire Safety
Behavioral
Lead sponsor
Pacific Institute for Research and Evaluation
Other
Eligibility
21 Years and older
Enrollment
959 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Jul 21, 2026, 11:24 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Harm Reduction in HIV Primary Care for PLWH Who Use Drugs

NCT05404750
View directory record Official record
Conditions
Human Immunodeficiency Virus, Substance Use, Stigma, Social
Interventions
Harm Reduction
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
641 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
3
States / cities
Birmingham, Alabama • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Jul 21, 2026, 11:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Naloxone Auto-injector as a Universal Precaution for Patients With Opioid Use Disorder

NCT02669901
View directory record Official record
Conditions
Opiate Antagonist Overdose, Opioid-Related Disorders
Interventions
Naloxone Auto-Injector
Behavioral
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older
Enrollment
395 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Aug 11, 2024 · Synced Jul 21, 2026, 11:24 AM EDT
Not listed No phase listed Observational

Comparative Tobacco Interventions for Individuals With Severe and Persisting Behavioral Health Disorders

NCT04523948
View directory record Official record
Conditions
Tobacco Use
Interventions
Behavioral and pharmacological support to reduce combustible tobacco use.
Behavioral
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years and older
Enrollment
100 participants
Timeline
2020 – 2023
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2021 · Synced Jul 21, 2026, 11:24 AM EDT
Completed No phase listed Observational

Evaluation of an HIV Outreach Program

NCT00300183
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jan 7, 2019 · Synced Jul 21, 2026, 11:24 AM EDT
Recruiting No phase listed Observational

Shelter HArm Reduction Evaluation

NCT07170072
View directory record Official record
Conditions
Overdose, Harm Reduction
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jul 21, 2026, 11:24 AM EDT