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Showing 1–24 of 208 matching trials from the live ClinicalTrials.gov search.
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Completed No phase listed Observational Accepts healthy volunteers

Executive Dysfunction and Self-Harm Behavior: An Examination of Veterans With TBI, PTSD, or Both

NCT01334463
View directory record Official record
Conditions
Traumatic Brain Injury, Post Traumatic Stress Disorder, Suicide, Self-Injurious Behavior
Interventions
Not listed
Lead sponsor
VA Eastern Colorado Health Care System
Federal
Eligibility
18 Years to 45 Years
Enrollment
186 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2016
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 24, 2016 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional

Patient Navigation-based Tobacco Harm Reduction Program Among Cancer Patients

NCT04972916
View directory record Official record
Conditions
Tobacco Use
Interventions
Patient navigation-based tobacco harm reduction intervention
Other
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 10, 2022 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Results available

THRIVE: Culturally AdapTed Harm Reduction Intervention

NCT06609278
View directory record Official record
Conditions
Opioid Use, Stimulant Use
Interventions
harm reduction intervention
Behavioral
Lead sponsor
Brittany Miller-Roenigk
Other
Eligibility
18 Years to 65 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
3
States / cities
Louisville, Kentucky • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional

Randomized Trial of Stepped Care for Suicide Prevention in Teens and Young Adults

NCT03092271
View directory record Official record
Conditions
Suicidal Behavior, Self-Harm, Deliberate, Suicidal Ideation, Suicide
Interventions
Stepped Care for Suicide Prevention, Zero Suicide Quality Improvement
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
12 Years to 24 Years
Enrollment
301 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
2
States / cities
Los Angeles, California • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 3, 2022 · Synced Sep 5, 2026, 12:40 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Switching to E-cigarettes in Smokers Not Interested in Quitting

NCT05703672
View directory record Official record
Conditions
Smoking Reduction
Interventions
Varenicline Tartrate, Placebo, Electronic cigarette
Drug · Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
21 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
2
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 28, 2025 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Community-Based, Client-Centered Prevention Homes to Address the Rural Opioid Epidemic- Aim 3

NCT04268173
View directory record Official record
Conditions
Drug Use Disorders, Hepatitis C, Harm Reduction, Opioid-use Disorder
Interventions
Community-Based, Client-Centered Prevention Home
Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
343 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
6
States / cities
Appleton, Wisconsin • Eau Claire, Wisconsin • Green Bay, Wisconsin + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Comparisons of Nicotine-free Cigarettes, Extra Low Nicotine Cigarettes vs. Medicinal Nicotine

NCT00777569
View directory record Official record
Conditions
Tobacco Dependence
Interventions
Nicotine free cigarettes, Extra-low nicotine cigarettes, Nicotine Lozenge
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 70 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 15, 2017 · Synced Sep 5, 2026, 12:40 AM EDT
Not listed Not applicable Interventional

Harm Reduction Talking Circles for American Indians and Alaska Natives With Alcohol Use Disorders

NCT04267692
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
HaRTC
Other
Lead sponsor
Washington State University
Other
Eligibility
21 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 25, 2023 · Synced Sep 5, 2026, 12:40 AM 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 13, 2026 · Synced Sep 5, 2026, 12:40 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, 12:40 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

A RCT to Determine the Effect of ENDS Flavor Availability on Abstinence Within Smokers

NCT07172438
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 Sep 5, 2026, 12:40 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 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Switching From Usual Brand Cigarettes to a Tobacco-heating Cigarette or Snus

NCT02061917
View directory record Official record
Conditions
Cigarette Smoking
Interventions
Tobacco-Heating Cigarette, Snus (Smokeless Tobacco), Tobacco-Burning Cigarette
Other
Lead sponsor
R.J. Reynolds Tobacco Company
Industry
Eligibility
28 Years to 55 Years
Enrollment
163 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
5
States / cities
Daytona Beach, Florida • Boise, Idaho • Portland, Oregon + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2016 · Synced Sep 5, 2026, 12:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Noncombustible Nicotine Delivery Systems as Potential Harm Reduction Tools for Persistent Cigarette Smokers

NCT06372899
View directory record Official record
Conditions
E-cigarette Use, Cigarette Smoking, Harm Reduction, Tobacco Use
Interventions
E-cigarettes, Oral nicotine pouches
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
21 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 11, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Active, not recruiting Not applicable Interventional

Leverage Noninvasive Transcutaneous Vagus Nerve Stimulation to Reduce Suicidal Behaviors in Vulnerable Adolescents

NCT05602779
View directory record Official record
Conditions
Self Harm, Suicidal Ideation
Interventions
tVNS Program, Phone App Program, tVNS and Phone App Program, Sham tNVS and Control App
Device · Other · Combination Product
Lead sponsor
University of Notre Dame
Other
Eligibility
13 Years to 17 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
South Bend, Indiana • Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

Impact of Nicotine Reduction on Adolescent Cigarette Use, Alternative Tobacco Use, and Harm From Tobacco

NCT03860077
View directory record Official record
Conditions
Nicotine Dependence, Cigarettes, Uncomplicated
Interventions
Very Low Nicotine Content Cigarettes, Normal Nicotine Content Cigarettes
Drug
Lead sponsor
Brown University
Other
Eligibility
15 Years to 20 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Dec 18, 2023 · Synced Sep 5, 2026, 12:40 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 Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Systems Aligning for Equity (SAFE) Spaces

NCT05658068
View directory record Official record
Conditions
Suicide, Mental Disorder, Mental Health, Burnout, Professional, Self Harm
Interventions
SAFE Spaces training and coaching
Behavioral
Lead sponsor
New York University
Other
Eligibility
Not listed
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Assisting Smokers to Switch to a JUUL E-Cigarette by Devaluing Combustible Cigarettes

NCT04188197
View directory record Official record
Conditions
Smoking Cessation, Harm Reduction, E-Cig Use, Cigarette Smoking, Tobacco Dependence, Tobacco Use Cessation
Interventions
JUUL
Other
Lead sponsor
Rose Research Center, LLC
Industry
Eligibility
21 Years to 65 Years
Enrollment
50 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 Apr 19, 2025 · Synced Sep 5, 2026, 12:40 AM EDT
Recruiting Not applicable Interventional

Parent Intervention for Psychiatrically-Hospitalized Youth

NCT04797455
View directory record Official record
Conditions
Adolescent - Emotional Problem, Suicide and Self-harm, Parenting
Interventions
DBT-Based Parenting Intervention, Treatment as usual
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
12 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 2, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional Results available

Supplementing Brief Psychotherapy With a Mobile App

NCT05867316
View directory record Official record
Conditions
Suicide and Self-harm, Emotion Regulation
Interventions
Unified Protocol
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Piscataway, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Sep 5, 2026, 12:40 AM EDT
Completed Not applicable Interventional

Adaptive Intervention for Adolescents Following Inpatient Psychiatric Care

NCT05282225
View directory record Official record
Conditions
Suicide, Suicide, Attempted, Suicidal Ideation, Self Harm
Interventions
MI- Safety Plan, Texts messages, Monitoring, Portal follow-up, Booster call
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
13 Years to 17 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
3
States / cities
Ann Arbor, Michigan • Detroit, Michigan • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Sep 5, 2026, 12:40 AM 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 10, 2019 · Synced Sep 5, 2026, 12:40 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

A Study Examining Adolescents With Non-Suicidal Self-Injury

NCT02947308
View directory record Official record
Conditions
Self-Injurious Behavior, Deliberate Self-Harm
Interventions
Not listed
Lead sponsor
University of Minnesota
Other
Eligibility
12 Years to 16 Years · Female only
Enrollment
168 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2023
U.S. locations
3
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 5, 2026, 12:40 AM EDT