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Showing 1–24 of 31 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Opioid Antagonist Clear all
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 9, 2026, 1:51 AM EDT
Terminated Phase 2 Interventional Results available

A Study of Naldemedine in Participants Undergoing Surgeries That Include a Bowel Resection or Bowel Transection

NCT04355169
View directory record Official record
Conditions
Postoperative Gastrointestinal Dysfunction
Interventions
Naldemedine, Placebo
Drug
Lead sponsor
Shionogi
Industry
Eligibility
18 Years to 80 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
8
States / cities
Tucson, Arizona • Louisville, Kentucky • Houston, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 17, 2022 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Prazosin and Naltrexone (PaN) Study for Veterans With Alcohol Use Disorders

NCT02322047
View directory record Official record
Conditions
Alcohol Use Disorder, Posttraumatic Stress Disorder (PTSD)
Interventions
Prazosin, Naltrexone, Placebo (Prazosin), Placebo (Naltrexone)
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
18 Years to 80 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Dec 28, 2020 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 1 Interventional

Pharmacokinetics of Low Dose Ketamine Infusion

NCT00618397
View directory record Official record
Conditions
Sedation, Opioid Tolerance
Interventions
Ketamine
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
3 Years to 18 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2015
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 25, 2016 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 2 Interventional Results available

Proof-of-Concept Trial of CERC-501 Augmentation of Antidepressant Therapy in Treatment-Resistant Depression

NCT01913535
View directory record Official record
Conditions
Treatment Resistant Depression
Interventions
CERC-501, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
4
States / cities
Chicago, Illinois • Wichita, Kansas • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Not applicable Interventional

The Impact of Co-Dispensing Naloxone to Patients Prescribed Chronic Opioid Therapy

NCT03337100
View directory record Official record
Conditions
Overdose, Risk Behavior
Interventions
Co-Dispensing
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 2 Interventional Results available

Naloxegol in Treating Patients With Stage IIIB-IV Non-small Cell Lung Cancer

NCT03087708
View directory record Official record
Conditions
Stage IIIB Non-Small Cell Lung Cancer, Stage IV Non-small Cell Lung Cancer
Interventions
Naloxegol, Placebo, Laboratory Biomarker Analysis, Quality-of-Life Assessment
Drug · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
660
States / cities
Anchorage, Alaska • Fairbanks, Alaska • Kingman, Arizona + 407 more
Source: ClinicalTrials.gov public record
Updated Jul 16, 2025 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Medications Development for the Treatment of Cannabis Related Disorders

NCT01204723
View directory record Official record
Conditions
Nicotine Withdrawal, Marijuana Dependence, Cannabis Dependence, Nicotine Dependence, Cannabis Abuse
Interventions
Placebo Aprepitant, Active Aprepitant
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 45 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
2
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated May 31, 2012 · Synced Sep 9, 2026, 1:51 AM EDT
Recruiting Phase 2 Interventional

Effects of Lemborexant on Insomnia and Its Relationship to Mood and Behavior on Opioid Use Disorder Subjects

NCT06981195
View directory record Official record
Conditions
Opioid Use Disorder, Opioid Use, Insomnia, Orexin Antagonist
Interventions
Placebo, Lemborexant 10 MG
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 9, 2026, 1:51 AM EDT
Not listed Not applicable Interventional

The Impact of a Web-Based Naloxone Intervention Under Standing Orders to Patients Prescribed Chronic Opioid Therapy

NCT03337009
View directory record Official record
Conditions
Overdose, Risk Behavior
Interventions
Naloxone Navigator (NN)
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
1,004 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated May 19, 2024 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

First in Humans Study of JDTic

NCT01431586
View directory record Official record
Conditions
Cocaine Dependence
Interventions
JDtic
Drug
Lead sponsor
RTI International
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated May 9, 2012 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 4 Interventional Results available

Extended-release Naltrexone and Care Management for Alcohol Dependent Frequent Emergency Department Users

NCT02445339
View directory record Official record
Conditions
Alcohol Dependence, Alcohol Use Disorder
Interventions
XR-NTX+CM (Extended-Release Naltrexone plus Care Management)
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Clinical Study to Investigate the Pharmacokinetics of Multiple Repeated Doses of Intranasal Naloxone

NCT04764630
View directory record Official record
Conditions
Healthy Subjects, Opioid Antagonist, Pharmacokinetics
Interventions
Four naloxone nasal spray doses (1 every 2.5 min), Four naloxone nasal spray doses (2 every 2.5 min), Two naloxone nasal spray doses (1 every 2.5 min)
Drug
Lead sponsor
Food and Drug Administration (FDA)
Federal
Eligibility
18 Years to 55 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 18, 2024 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Naloxone and Intravenous Methylnaltrexone Effects on Bladder Function

NCT01367561
View directory record Official record
Conditions
Healthy Males
Interventions
Naloxone, IV Methylnaltrexone (MNTX), Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2003
U.S. locations
1
States / cities
Tarrytown, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 2 Interventional Results available

Suvorexant for Opioid/Stimulant Co-use

NCT05546515
View directory record Official record
Conditions
Opioid Use Disorder, Stimulant Use Disorder
Interventions
Suvorexant (dual orexin receptor antagonist), Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 22, 2025 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 4 Interventional Results available

Effect of Methylnaltrexone on the PK/PD Profiles of Ticagrelor in Patients Treated With Morphine

NCT02403830
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
Methylnaltrexone, Placebo, Morphine, Ticagrelor
Drug · Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 3 Interventional Results available

Cardiovascular Outcomes Study of Naltrexone SR/Bupropion SR in Overweight and Obese Subjects With Cardiovascular Risk Factors (The Light Study)

NCT01601704
View directory record Official record
Conditions
Obesity, Overweight
Interventions
NB32, PBO, Weight Management Program
Drug · Behavioral
Lead sponsor
Orexigen Therapeutics, Inc
Industry
Eligibility
45 Years and older
Enrollment
8,910 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
224
States / cities
Birmingham, Alabama • Dothan, Alabama • Mobile, Alabama + 221 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2017 · Synced Sep 9, 2026, 1:51 AM EDT
Recruiting Phase 1 Interventional

Naltrexone and Propranolol Combined With Immunotherapy

NCT05968690
View directory record Official record
Conditions
Advanced Melanoma
Interventions
Propranolol, Naltrexone
Drug
Lead sponsor
Sarah Weiss
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Sep 9, 2026, 1:51 AM EDT
Withdrawn Phase 2 Interventional

Treatment of Chronic Itch in Atopic Dermatitis With Opioid Antagonist Naltrexone

NCT04325802
View directory record Official record
Conditions
Atopic Dermatitis, Pruritus, Pruritus Chronic, Dermatitis
Interventions
Naltrexone, Placebo
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 3, 2023 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Aprepitant Effects on Oxycodone Response

NCT00999544
View directory record Official record
Conditions
Narcotic Abuse
Interventions
Aprepitant 0mg, Aprepitant 40mg, Aprepitant 200mg, Oxycodone 0mg, p.o., Oxycodone 20mg, p.o., Oxycodone 40mg, p.o., Oxycodone 0mg, IN, Oxycodone 15mg, IN, Oxycodone 30mg, IN
Drug
Lead sponsor
Sharon Walsh
Other
Eligibility
18 Years to 55 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 31, 2017 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 2 Interventional Results available

Methylnaltrexone for Opioid-induced Constipation in Cancer Patients

NCT01004393
View directory record Official record
Conditions
Neoplasms, Constipation, Opioid-Related Disorders
Interventions
Methylnaltrexone bromide
Drug
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Feb 1, 2016 · Synced Sep 9, 2026, 1:51 AM EDT
Completed Phase 2 Interventional Results available

Memantine and Naltrexone Treatment for Opioid Dependence

NCT00125515
View directory record Official record
Conditions
Opioid Dependence
Interventions
Memantine, Naltrexone
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 60 Years
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 17, 2018 · Synced Sep 9, 2026, 1:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Response to Pain Control in People With Chronic Pain

NCT01878019
View directory record Official record
Conditions
Pain
Interventions
Not listed
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 8, 2019 · Synced Sep 9, 2026, 1:51 AM EDT
Terminated Phase 2 Interventional

Opioid Agonist and Antagonist Effects on Opioid Dependence

NCT00142727
View directory record Official record
Conditions
Opioid-Related Disorders
Interventions
Methadone, Full opioid agonist, Partial opioid agonist, Opioid antagonist
Drug
Lead sponsor
National Institute on Drug Abuse (NIDA)
NIH
Eligibility
18 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Sep 9, 2026, 1:51 AM EDT