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ClinicalTrials.gov public records Last synced May 21, 2026, 10:53 PM EDT

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

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Harm Reduction Clear all
Active, not recruiting No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Medication Abuse, Harm Reduction, Opioid Overdose, Opioid Prescribing
Interventions
Naloxone Co-prescribing Clinical Decision Support (CDS)
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
12 Years to 89 Years
Enrollment
200,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced May 21, 2026, 10:53 PM EDT
Not yet recruiting Not applicable Interventional
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 Mar 3, 2026 · Synced May 21, 2026, 10:53 PM EDT
Terminated Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Smoking Cessation, Harm Reduction
Interventions
Nicoderm, Nicorette 4Mg Chewing Gum, Nicorette Lozenge Product, BIDI e-cigarette, on!
Drug · Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
22 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Charlotte, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 29, 2025 · Synced May 21, 2026, 10:53 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
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 May 21, 2026, 10:53 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers
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
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Springfield, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced May 21, 2026, 10:53 PM EDT
Active, not recruiting Not applicable Interventional
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 May 21, 2026, 10:53 PM EDT
Completed No phase listed Observational
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 May 21, 2026, 10:53 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Cardiovascular Disease, Tobacco Use Disorder
Interventions
Nicotine replacement, Motivational counseling
Drug · Behavioral
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years and older
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
2
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 9, 2017 · Synced May 21, 2026, 10:53 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Alcohol Use, Alcohol Drinking, Drinking Behavior
Interventions
Smartphone breathalyzer device/app use, BAC estimator app use, Text messaging procedure
Other
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 25 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 25, 2024 · Synced May 21, 2026, 10:53 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Smoking Cessation, Harm Reduction
Interventions
Nicoderm, Nicorette 4Mg Chewing Gum, Nicorette Lozenge Product, NJOY e-cigarette, on!
Drug · Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
22 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
2
States / cities
Charlotte, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced May 21, 2026, 10:53 PM EDT
Enrolling by invitation Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Burnout, Compassion Satisfaction, Secondary Trauma
Interventions
PATH (Peer Advanced Training in Harm reduction)
Behavioral
Lead sponsor
Chestnut Health Systems
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Quest
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
21 Years to 65 Years
Enrollment
246 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 18, 2013 · Synced May 21, 2026, 10:53 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers
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 May 21, 2026, 10:53 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Cigarette Smoking, Smoking Behaviors
Interventions
Switching to E-Cigarette, Switching using Medication
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
21 Years and older
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 24, 2025 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional
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 May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Opioid Overdose
Interventions
Organize and Mobilize for Implementation Effectiveness, Dissemination
Other
Lead sponsor
RTI International
Other
Eligibility
18 Years and older
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Dec 11, 2024 · Synced May 21, 2026, 10:53 PM EDT
Terminated Not applicable Interventional Results available
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 6, 2023 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Harm Reduction
Interventions
Text message nudges, Commitment contract
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
137 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 4, 2024 · Synced May 21, 2026, 10:53 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Smoking, Tobacco
Interventions
P2611222, P2615022, P2615122, P2613422
Other
Lead sponsor
RAI Services Company
Industry
Eligibility
21 Years to 65 Years
Enrollment
668 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
27
States / cities
Chandler, Arizona • Fort Smith, Arkansas • Altamonte Springs, Florida + 21 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced May 21, 2026, 10:53 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Tobacco Use Disorder
Interventions
Oral tobacco, Nicotine Gum
Other · Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Enrollment
391 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
2
States / cities
Minneapolis, Minnesota • Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 5, 2017 · Synced May 21, 2026, 10:53 PM EDT
Terminated Not applicable Interventional
View directory record Official record
Conditions
Stress Disorders, Post-Traumatic, Opioid Use Disorder
Interventions
Written Exposure Therapy - Integrated
Behavioral
Lead sponsor
Jesse McCann
Other
Eligibility
18 Years to 100 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 9, 2025 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 30, 2023 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Opioid-Related Disorders
Interventions
Behavioral: the OPT-IN Intervention
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 12, 2020 · Synced May 21, 2026, 10:53 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Smoking
Interventions
E-cigarette
Other
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
21 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 30, 2024 · Synced May 21, 2026, 10:53 PM EDT