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ClinicalTrials.gov public records Last synced Oct 20, 2026, 4:45 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 49–72 of 125 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Harm Reduction Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Validation of Biomarkers of Exposure and Host Response

NCT00468234
View directory record Official record
Conditions
Cigarette Smoker
Interventions
nicotine polacrilex, nicotine transdermal system, nicotine inhaler
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 31, 2023 · Synced Oct 20, 2026, 4:45 PM 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 28, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Reducing Overdose and Substance Use-related Stigma by Training Non-substance-using Friends and Family Members of People Who Use Opioids to Be Harm Reduction Champions

NCT06823453
View directory record Official record
Conditions
Opioid Overdose Prevention, People Who Use Opioids/People With Opioid Use Disorder (OUD), Reduction of Substance Use-related Stigma, Non-substance-using People With a Friend or Family Member Who Uses Opioids, Peer Harm Reduction Support Champions
Interventions
Peer Harm Reduction Support Champion Intervention
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Game-Based Intervention to Reduce Alcohol-Related Harms Among Sexual and Gender Minority Youth

NCT06215664
View directory record Official record
Conditions
Alcohol Problem, Harm Reduction, Alcohol-Related Harm
Interventions
Singularities Game, Food4Thought
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
14 Years to 18 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 20, 2026, 4:45 PM 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 11, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Recruiting Not applicable Interventional

Health Effects of the Standardized Research E-Cigarette in Smokers With HIV Smokers With HIV

NCT03862924
View directory record Official record
Conditions
HIV
Interventions
Standardized Research Electronic Cigarette
Device
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jun 18, 2024 · Synced Oct 20, 2026, 4:45 PM EDT
Not listed Not applicable Interventional

Harm Reduction for Tobacco Smoking With Support of Tobacco-Replacing Electronic Nicotine Delivery Systems

NCT03962660
View directory record Official record
Conditions
Smoking, Tobacco
Interventions
HaRTS-TRENDS, Standard Care (SC)
Other
Lead sponsor
University of Washington
Other
Eligibility
21 Years to 65 Years
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 24, 2019 · Synced Oct 20, 2026, 4:45 PM EDT
Terminated Not applicable Interventional Results available

Analysis of Lipid Biomarkers of Exposure and Host Response

NCT00493831
View directory record Official record
Conditions
Cigarette Smoking
Interventions
nicotine polacrilex, transdermal system or inhaler
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Oct 20, 2026, 4:45 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Cigarette Harm Reduction With Electronic Cigarette Use

NCT03473483
View directory record Official record
Conditions
Nicotine Dependence, Tobacco Toxicity, Nicotine Dependence, Cigarettes, Cardiovascular Risk Factor, Nicotine Withdrawal
Interventions
SREC
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 9, 2022 · Synced Oct 20, 2026, 4:45 PM 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 12, 2021 · Synced Oct 20, 2026, 4:45 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Catalyzing Cigarette Smoking Cessation Through Harm Reduction Sampling Among People Unmotivated to Quit

NCT07199517
View directory record Official record
Conditions
Cigarette Smoking, Tobacco Use, Cigarette Smoking Behavior
Interventions
HRP Sampling period, NPL Sampling period
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
21 Years and older
Enrollment
472 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Completed Not applicable Interventional

Electronic Cigarettes as a Harm Reduction Strategy Among People Living With HIV/AIDS

NCT04218708
View directory record Official record
Conditions
Nicotine Addiction
Interventions
Nicotine patch and gum, Minnesota Nicotine Withdrawal Scale (MNWS), ASSIST (the Alcohol, Smoking and Substance Involvement Screening), Counseling, NIDA Standardized Research E-cigarettes (SREC)
Other · Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
64 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 20, 2024 · Synced Oct 20, 2026, 4:45 PM EDT
Terminated Not applicable Interventional Results available

Analysis of Aldehyde Biomarkers of Exposure and Host Response

NCT00482690
View directory record Official record
Conditions
Smoking Cessation
Interventions
nicotine polacrilex, nicotine transdermal system, nicotine inhaler
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Oct 20, 2026, 4:45 PM 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 13, 2026 · Synced Oct 20, 2026, 4:45 PM 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 8, 2026 · Synced Oct 20, 2026, 4:45 PM 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 23, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Completed Not applicable Interventional Results available

Ending Transmission of HIV, HCV, and STDs and Overdose in Rural Communities of People Who Inject Drugs (ETHIC)

NCT04427202
View directory record Official record
Conditions
HIV, Hepatitis C, Opioid-use Disorder, Injection Drug Use
Interventions
Referral to harm reduction services
Behavioral
Lead sponsor
University of Chicago
Other
Eligibility
15 Years and older
Enrollment
306 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
2
States / cities
Carbondale, Illinois • Murphysboro, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 12, 2024 · Synced Oct 20, 2026, 4:45 PM EDT
Not listed Not applicable Interventional

Real-time Intervention for Suicide Risk Reduction

NCT03950765
View directory record Official record
Conditions
Suicide, Attempted, Suicide and Self-harm
Interventions
Ecological momentary intervention
Behavioral
Lead sponsor
Harvard University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 1, 2019 · Synced Oct 20, 2026, 4:45 PM 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 29, 2025 · Synced Oct 20, 2026, 4:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Abstinence From E-cigarettes Produce Withdrawal Symptoms?

NCT02825459
View directory record Official record
Conditions
Substance Withdrawal Syndrome
Interventions
Abstinence from e-cigarettes
Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
147 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
2
States / cities
Baltimore, Maryland • Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Nov 20, 2018 · Synced Oct 20, 2026, 4:45 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Combination of E-cigarettes and Varenicline for Tobacco Harm Reduction

NCT04210180
View directory record Official record
Conditions
Smoking Cessation, Harm Reduction
Interventions
Varenicline, e-cigarette
Drug · Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
25 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 Feb 24, 2022 · Synced Oct 20, 2026, 4:45 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Rigorous Evaluation of High School FLASH

NCT04079608
View directory record Official record
Conditions
Pregnancy Related, Sexual Behavior, STD
Interventions
FLASH curriculum, Sexual Health Education for Adolescents
Behavioral
Lead sponsor
ETR Associates
Other
Eligibility
14 Years to 18 Years
Enrollment
1,597 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Scotts Valley, California
Source: ClinicalTrials.gov public record
Updated Sep 11, 2019 · Synced Oct 20, 2026, 4:45 PM EDT
Recruiting Not applicable Interventional

Harm Reduction for Smokers With Mental Illness

NCT06543407
View directory record Official record
Conditions
Tobacco Dependence
Interventions
SWITCH IT, E-cig Provision Only
Behavioral · Other
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
21 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
2
States / cities
Louisville, Kentucky • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Oct 20, 2026, 4:45 PM EDT
Enrolling by invitation Not applicable Interventional

CPNF Intervention Development and Testing

NCT07036198
View directory record Official record
Conditions
Alcohol Use
Interventions
Customizable personalized normative feedback (CPNF), Personalized normative feedback (PNF), Attention-Matched Control (AMC)
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 24 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Oct 20, 2026, 4:45 PM EDT