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Showing 1–24 of 128 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral naltrexone Clear all
Terminated Phase 4 Interventional Results available

Pilot Study of Depot NTX in Homeless Veterans

NCT01155869
View directory record Official record
Conditions
Alcohol Dependence
Interventions
Depot naltrexone, Oral Naltrexone
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years to 64 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jul 16, 2014 · Synced Sep 8, 2026, 10:09 PM EDT
Terminated Phase 4 Interventional Results available

Safety Study to Assess Opiate Withdrawal Signs and Symptoms in Opioid Dependent Patients

NCT01100437
View directory record Official record
Conditions
Chronic Pain
Interventions
EMBEDA™ (morphine sulfate/naltrexone hydrochloride) crush, EMBEDA™ (morphine sulfate/naltrexone hydrochloride) whole
Drug
Lead sponsor
Pfizer
Industry
Eligibility
21 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 12, 2012 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Improving Treatment Outcomes for Prescription Opioid Dependence

NCT02543944
View directory record Official record
Conditions
Drug Dependence
Interventions
Gabapentin, Buprenorphine, Clonidine, Naltrexone (oral), Naltrexone (depot), Placebo
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 65 Years
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jul 27, 2022 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 4 Interventional Results available

Alcohol Disorder hOsPital Treatment Trial

NCT02478489
View directory record Official record
Conditions
Heavy Drinking, Alcohol Dependence, Alcohol Use Disorder
Interventions
Oral naltrexone (PO-NTX), Extended-release injectable naltrexone (XR-NTX)
Drug
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
248 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2021 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Evaluation of Intranasal, Intramuscular, and Oral Naltrexone in Healthy Volunteers

NCT02750748
View directory record Official record
Conditions
Opioid-Related Disorders
Interventions
Naltrexone, Intravail
Drug · Other
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 4 Interventional Results available

Real World Effectiveness of Combining an Employer-based Weight Management Program With Medication for Chronic Weight Management in Employees With Obesity

NCT03799198
View directory record Official record
Conditions
Obesity
Interventions
Weight Management Program (WMP), Medication for chronic weight management (Rx)
Other · Drug
Lead sponsor
Novo Nordisk A/S
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 13, 2022 · Synced Sep 8, 2026, 10:09 PM EDT
Terminated Phase 2 Interventional Results available

Study of Immunomodulation Using Naltrexone and Ketamine for COVID-19

NCT04365985
View directory record Official record
Conditions
COVID-19, Acute Respiratory Distress Syndrome, Severe Acute Respiratory Syndrome (SARS), Coronavirus Infections
Interventions
Naltrexone, Ketamine, Placebo
Drug · Other
Lead sponsor
Corewell Health East
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 25, 2022 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Abuse Potential of Orally Administered Crushed Embeda Compared to Crushed Controlled-Release Morphine and Placebo in Non-Dependent Recreational Opioid Users

NCT01380093
View directory record Official record
Conditions
Nondependent Opioid Abuse, Episodic
Interventions
Placebo, MS Contin (morphine sulfate, controlled release), EMBEDA (morphine sulfate / naltrexone hydrochloride)
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 30, 2012 · Synced Sep 8, 2026, 10:09 PM EDT
Active, not recruiting Phase 3 Interventional

Trial of Naltrexone/Bupropion for the Treatment of Methamphetamine Use Disorder

NCT06233799
View directory record Official record
Conditions
Methamphetamine-dependence, Methamphetamine Abuse
Interventions
extended-release naltrexone (XR-NTX), extended release bupropion (BUP-XL) tablets (BUP-XL), iPLB, oPLB
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 65 Years
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
11
States / cities
Little Rock, Arkansas • Los Angeles, California • San Diego, California + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 2 Interventional Results available

Sweet Preference and Alcohol Craving

NCT01296646
View directory record Official record
Conditions
Alcohol Dependence, Alcohol Abuse
Interventions
Naltrexone, Brenda Therapy Sessions, Placebo
Drug · Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 4 Interventional Results available

Extended-Release vs. Oral Naltrexone Alcohol Treatment in Primary Care

NCT01893827
View directory record Official record
Conditions
Alcohol Dependence
Interventions
XR-NTX (Extended-Release Naltrexone), Oral Naltrexone (O-NTX)
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
237 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 15, 2020 · Synced Sep 8, 2026, 10:09 PM EDT
Withdrawn Not applicable Interventional

Can The Bridge Transition Opiate Use Disorder Patients in Stable Recovery From Buprenorphine to Naltrexone

NCT03762798
View directory record Official record
Conditions
Substance Use Disorders, Substance Abuse, Substance Use, Substance Dependence
Interventions
The Bridge
Device
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 22, 2021 · Synced Sep 8, 2026, 10:09 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Medications for Opioid Use Disorder Photosensitive Retinal Ganglion Cell Function, Sleep, and Circadian Rhythms: Implications for Treatment

NCT06104280
View directory record Official record
Conditions
Opioid Use Disorder, Sleep Disturbance
Interventions
Post-Illumination Pupillary Response (PIPR), Polysomnography, Multiple Sleep Latency Test, Ecological Momentary Assessments, Actigraphy, DLMO, Melatonin Suppression Test
Other · Behavioral · Device
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 80 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 4 Interventional

Rapid Antidepressant Improvement Secondary to Excitatory Brain Responses

NCT04276259
View directory record Official record
Conditions
Major Depressive Disorder, Depression
Interventions
Buprenorphine, Naltrexone, Oral Placebo, IM Placebo, Theta burst stimulation (TBS) of the ventromedial prefrontal cortex.
Drug · Device
Lead sponsor
Marta Peciña, MD PhD
Other
Eligibility
18 Years to 55 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Targeted Naltrexone to Support Individuals Participating in Dry January

NCT07132177
View directory record Official record
Conditions
Alcohol Misuse
Interventions
Naltrexone (oral tablets)
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 3 Interventional Results available

Accelerated Development of Additive Pharmacotherapy Treatment (ADAPT-2) for Methamphetamine Use Disorder

NCT03078075
View directory record Official record
Conditions
Methamphetamine Use Disorder
Interventions
Naltrexone: Vivitrol®, Placebo (PLB) Injectable, Bupropion: Wellbutrin XL®, Placebo (PLB) Oral
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
403 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
8
States / cities
Los Angeles, California • San Francisco, California • Minneapolis, Minnesota + 5 more
Source: ClinicalTrials.gov public record
Updated May 2, 2021 · Synced Sep 8, 2026, 10:09 PM EDT
Completed No phase listed Observational

MOM NEST Study: Maternal Opioid Medication: Naltrexone Efficacy Study

NCT03718104
View directory record Official record
Conditions
Opioid-use Disorder, Neonatal Abstinence Syndrome, Pregnancy, High Risk, Alcohol Use Disorder
Interventions
Pharmacokinetic analysis, Safety and Efficacy, Genetic and epigenetic analysis, Breast milk analysis
Other · Genetic
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
2
States / cities
Boston, Massachusetts • Carrboro, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 3, 2024 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Targeting GABA and Opioid Systems for a Pharmacotherapy for Methamphetamine Abuse

NCT01967381
View directory record Official record
Conditions
Methamphetamine Abuse, Methamphetamine Dependence
Interventions
Methamphetamine (Desoxyn®)
Drug
Lead sponsor
University of Kentucky
Other
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Sep 13, 2018 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

The Effect of Buprenorphine Delivered by Buprenorphine Transdermal System (BTDS) at Doses up to 80 Micrograms/Hour (mcg/hr) and Naltrexone on Electrocardiogram (ECG) Intervals in Healthy Volunteers

NCT01999114
View directory record Official record
Conditions
ECG Effects
Interventions
Buprenorphine transdermal patch, Naltrexone tablet, Placebos (for TDS and for naltrexone and for moxifloxacin), Moxifloxacin tablet
Drug
Lead sponsor
Purdue Pharma LP
Industry
Eligibility
18 Years to 55 Years
Enrollment
328 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Nov 4, 2018 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Results available

ED Initiated Oral Naltrexone for AUD

NCT04817410
View directory record Official record
Conditions
Alcohol Use Disorder
Interventions
Emergency Department Initiated Oral Naltrexone
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Phase 1 Naltrexone-Bupropion-Methamphetamine Interaction Study

NCT01359930
View directory record Official record
Conditions
Methamphetamine Dependence
Interventions
placebo, Naltrexone and Bupropion SR
Other · Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
21 Years to 50 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study To Characterize The Pharmacokinetics Of Oxycodone In Healthy Volunteers

NCT01552863
View directory record Official record
Conditions
Pain
Interventions
Oxycodone
Drug
Lead sponsor
Pain Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 30, 2015 · Synced Sep 8, 2026, 10:09 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Dose Proportionality Study Of PF-00345439 Formulation Under Fed Conditions

NCT02089295
View directory record Official record
Conditions
Healthy
Interventions
Oxycodone
Drug
Lead sponsor
Pain Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
2
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Apr 3, 2016 · Synced Sep 8, 2026, 10:09 PM EDT
Completed No phase listed Observational Results available

Real-World Evidence on the Cardiovascular Safety of CONTRAVE® in the United States (U.S.)

NCT06090461
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
Currax Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
31,889 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Brentwood, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Sep 8, 2026, 10:09 PM EDT