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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Opioid Agonist Clear all
Completed Phase 3 Interventional Results available

Open-Label, Safety Study of Lofexidine

NCT02363998
View directory record Official record
Conditions
Opioid Withdrawal
Interventions
Lofexidine
Drug
Lead sponsor
USWM, LLC (dba US WorldMeds)
Industry
Eligibility
18 Years and older
Enrollment
286 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
18
States / cities
Little Rock, Arkansas • Springdale, Arkansas • San Diego, California + 15 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2022 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Buprenorphine for Prisoners

NCT00574067
View directory record Official record
Conditions
Heroin Addiction
Interventions
Buprenorphine +OTP, Buprenorphine +CHC, Counseling +OTP, Counseling +CHC
Drug
Lead sponsor
Friends Research Institute, Inc.
Other
Eligibility
18 Years to 60 Years
Enrollment
213 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
2
States / cities
Baltimore, Maryland • Jessup, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2Phase 3 Interventional

Directly Administered HIV Therapy in Methadone Clinics

NCT00279110
View directory record Official record
Conditions
HIV Infections, Heroin Dependence
Interventions
Directly administered antiretroviral therapy (DAART)
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2011
U.S. locations
5
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 14, 2015 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2 Interventional

Analgesic Efficacy and Safety of ADL5859 in Subjects With Acute Dental Pain After Third Molar Extraction

NCT00993863
View directory record Official record
Conditions
Acute Pain
Interventions
Placebo, ADL5859 30 mg, ADL5859 100 mg, ADL5859 200 mg, ibuprofen 400 mg
Drug
Lead sponsor
Cubist Pharmaceuticals LLC, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
Industry
Eligibility
18 Years to 50 Years
Enrollment
201 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2015 · Synced Sep 28, 2026, 8:54 AM EDT
Completed No phase listed Observational

The CORE Buprenorphine Project - An HIV Primary Care Program Demonstration

NCT00227357
View directory record Official record
Conditions
HIV Infections, AIDS, Opiate Dependence, Post-Traumatic Stress Disorders
Interventions
On-site - buprenorphine/naloxone (Suboxone), Off-site - methadone or no agonist
Drug
Lead sponsor
Ruth M. Rothstein CORE Center
Other
Eligibility
18 Years and older
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 6, 2010 · Synced Sep 28, 2026, 8:54 AM EDT
Enrolling by invitation Phase 4 Interventional Accepts healthy volunteers

Reducing Opioid Use After Upper Extremity Surgery: Testing Lower Prescriptions and Pill Quantity

NCT07750639
View directory record Official record
Conditions
Opioid Abuse (Disorder), Opioid Analgesia, Opioid Analgesic Adverse Reaction, Opioid Consumption
Interventions
Naproxen, Acetaminophen, oxycodone, Gabapentin
Drug
Lead sponsor
AdventHealth
Other
Eligibility
18 Years and older
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Trifecta Research Study

NCT07717866
View directory record Official record
Conditions
PTSD - Post Traumatic Stress Disorder, Cognitive Dysfunction, Brain Injury, Depression - Major Depressive Disorder, Suicidal Ideation
Interventions
Magnetic e-Resonance Therapy (MeRT), Ibogaine Hydrochloride with Magnesium Sulfate, 5-methoxy-N,N-dimethyltryptamine, Physiological Supplementation
Device · Drug
Lead sponsor
Axial Therapeutic Research
Industry
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Northridge, California
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2 Interventional Results available

HOPE Consortium Trial to Reduce Pain and Opioid Use in Hemodialysis

NCT04571619
View directory record Official record
Conditions
End Stage Renal Disease, Chronic Pain, Opioid Dependence
Interventions
Pain Coping Skills Training (PCST), Buprenorphine
Behavioral · Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
643 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
16
States / cities
West Haven, Connecticut • Chicago, Illinois • Boston, Massachusetts + 11 more
Source: ClinicalTrials.gov public record
Updated Jan 12, 2025 · Synced Sep 28, 2026, 8:54 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 28, 2026, 8:54 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Better Options for Chronic Cancer Pain

NCT06574009
View directory record Official record
Conditions
Chronic Pain, Cancer Survivor, Opioid Dependence
Interventions
Multimodal pain care, Medication optimization, Buprenorphine rotation, Opioid tapering
Behavioral · Drug · Device + 1 more
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 99 Years
Enrollment
294 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
2
States / cities
Indianapolis, Indiana • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Testosterone Replacement for Male Opioid Agonist Maintained Patients

NCT01873989
View directory record Official record
Conditions
Chronic Pain, Opioid Addiction, Symptomatic Hypogonadism
Interventions
Testosterone replacement, Waitlist control
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jun 11, 2017 · Synced Sep 28, 2026, 8:54 AM EDT
Recruiting Phase 4 Interventional

Low-dose Buprenorphine Initiation for Opioid Use Disorder

NCT05450718
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
buprenorphine-naloxone
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Not applicable Interventional

Study of Yoga vs. Health Education for Chronic Pain in Persons Receiving Opioid Agonist Therapy

NCT03022890
View directory record Official record
Conditions
Opioid-Related Disorders, Pain, Chronic
Interventions
hatha yoga, health education
Behavioral
Lead sponsor
Butler Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Fall River, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 8, 2019 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2 Interventional

Dose-ranging Study to Assess Safety and Efficacy of SP-333 for the Treatment of Opioid-induced Constipation (OIC)

NCT01983306
View directory record Official record
Conditions
Constipation
Interventions
SP-333 1 mg, SP-333 3 mg, SP-333 6 mg, Placebo
Drug
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
292 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
42
States / cities
Huntsville, Alabama • Mobile, Alabama • Phoenix, Arizona + 35 more
Source: ClinicalTrials.gov public record
Updated May 6, 2021 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2 Interventional Results available

A Phase 2 Study to Evaluate Analgesic Effect of IV CR845 For Pain Following Bunionectomy Surgery

NCT01789476
View directory record Official record
Conditions
Acute Pain
Interventions
CR845, Placebo
Drug
Lead sponsor
Cara Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 29, 2015 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2 Interventional Results available

Dexmedetomidine Use in Infants Undergoing Cooling Due to Neonatal Encephalopathy (DICE Trial)

NCT04772222
View directory record Official record
Conditions
Hypoxic-Ischemic Encephalopathy, Pain
Interventions
Dexmedetomidine Hydrochloride, Morphine Sulfate
Drug
Lead sponsor
University of Utah
Other
Eligibility
Up to 24 Hours
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
5
States / cities
Murray, Utah • Ogden, Utah • Provo, Utah + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Recruiting Not applicable Interventional

Technology-Enhanced Therapy vs. Medication Monitoring for Buprenorphine Retention in Pregnant Persons

NCT06999811
View directory record Official record
Conditions
Opioid Use Disorder, Pregnancy
Interventions
Empowering Pregnant Women and People Receiving medications for opioid use disorder (EMPWR), Medication monitoring (control)
Behavioral · Other
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Withdrawn Phase 2 Interventional

Trifecta Research Study

NCT06810765
View directory record Official record
Conditions
PTSD - Post Traumatic Stress Disorder, Cognitive Dysfunction, Brain Trauma, Brain Injuries
Interventions
Hormone Replacement Therapy (HRT), Magnetic Resonance Therapy (MeRT), ibogaine with magnesium treatment, 5-MeO-DMT
Other · Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 21, 2025 · Synced Sep 28, 2026, 8:54 AM EDT
Suspended Phase 2 Interventional

Randomized, Double-Blind, Active Placebo-Controlled Study of Ketamine to Treat Levodopa-Induced Dyskinesia

NCT04912115
View directory record Official record
Conditions
Dyskinesias, Movement Disorders, Central Nervous System Diseases, Nervous System Diseases, Neurologic Manifestations
Interventions
Ketamine, Midazolam
Drug
Lead sponsor
PharmaTher Inc.
Industry
Eligibility
30 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
7
States / cities
Tucson, Arizona • Chula Vista, California • Fountain Valley, California + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2023 · Synced Sep 28, 2026, 8:54 AM EDT
Recruiting Phase 2 Interventional

GLP-1R Agonist Treatment for Opioid Use Disorder

NCT06548490
View directory record Official record
Conditions
Opioid Use Disorder, Opioid Abuse and Addiction, Narcotic-Related Disorders, Substance-Related Disorders, Chemically-Induced Disorders, Mental Disorder, Opioid
Interventions
Semaglutide Pen Injector, Placebo
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
4
States / cities
Baltimore, Maryland • Fall River, Massachusetts • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 4 Interventional Results available

Extended-Release Naltrexone Opioid Treatment at Jail Re-Entry

NCT01999946
View directory record Official record
Conditions
Heroin Dependence, Opioid-Related Disorders
Interventions
Extended-Release Naltrexone
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 99 Years
Enrollment
217 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 24, 2021 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 2Phase 3 Interventional

Tobacco Use in Opioid Agonist Treated Pregnant Women

NCT00497068
View directory record Official record
Conditions
Nicotine Dependence
Interventions
tobacco abstinent contingent, non-contingent, control
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2013 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 3 Interventional

Combining Behavioral Treatment With Agonist Maintenance - 1

NCT00000311
View directory record Official record
Conditions
Cocaine-Related Disorders, Opioid-Related Disorders, Substance-Related Disorders
Interventions
Buprenorphine, methadone
Drug
Lead sponsor
Yale University
Other
Eligibility
Not listed
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 1999
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 16, 2018 · Synced Sep 28, 2026, 8:54 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Use of a GLP-1R Agonist to Treat Opioid Use Disorder

NCT04199728
View directory record Official record
Conditions
Opiate Substitution Treatment, Opioid-Related Disorders
Interventions
Liraglutide Pen Injector, Placebo
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 5, 2024 · Synced Sep 28, 2026, 8:54 AM EDT