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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Opioid Placebo Clear all
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Study to Assess Repeated Doses of INDV-2000 in Healthy Volunteers and in Treatment Seeking Individuals With Opioid Use Disorder

NCT04976855
View directory record Official record
Conditions
Healthy Volunteer, Opioid-use Disorder
Interventions
INDV-2000, Placebo, SUBOXONE® sublingual film
Drug
Lead sponsor
Indivior Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
3
States / cities
Baltimore, Maryland • DeSoto, Texas • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 20, 2024 · Synced Sep 28, 2026, 2:11 AM 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 28, 2026, 2:11 AM EDT
Not yet recruiting Phase 3 Interventional

PO Methadone Ortho Outpatient

NCT06351215
View directory record Official record
Conditions
Arthroscopic Knee Repair, Arthroscopic Hip Repair
Interventions
Methadone group, Placebo
Drug
Lead sponsor
Keck School of Medicine of USC
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 4, 2025 · Synced Sep 28, 2026, 2:11 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Examining Mu Opioid Mechanisms of Ketamine's Rapid Effects in OCD (MKET2)

NCT05940324
View directory record Official record
Conditions
Obsessive-Compulsive Disorder
Interventions
Ketamine, Naltrexone Pill, Placebo pill
Drug · Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 3 Interventional Results available

Fentanyl Buccal Tablets Versus Immediate Release Oxycodone for Breakthrough Pain in Patients With Chronic Pain

NCT00813488
View directory record Official record
Conditions
Chronic Pain
Interventions
Fentanyl Buccal Tablet, Immediate release oxycodone
Drug
Lead sponsor
Cephalon
Industry
Eligibility
18 Years to 80 Years
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
50
States / cities
Birmingham, Alabama • Mobile, Alabama • Beverly Hills, California + 45 more
Source: ClinicalTrials.gov public record
Updated May 27, 2012 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 3 Interventional Results available

Buprenorphine Transdermal System (BTDS) in Subjects w/Mod-sev Osteoarthritis (OA) Chronic Pain of Knee

NCT00531427
View directory record Official record
Conditions
Chronic Pain, Osteoarthritis of the Knee
Interventions
Buprenorphine, Placebo
Drug
Lead sponsor
Purdue Pharma LP
Industry
Eligibility
40 Years and older
Enrollment
567 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
87
States / cities
Mobile, Alabama • Chandler, Arizona • Phoenix, Arizona + 73 more
Source: ClinicalTrials.gov public record
Updated Sep 9, 2012 · Synced Sep 28, 2026, 2:11 AM EDT
Terminated Not applicable Interventional Results available

Effectiveness of Electrical Neurostimulation in Cyclic Vomiting Syndrome.

NCT04721171
View directory record Official record
Conditions
Cyclic Vomiting Syndrome
Interventions
The Bridge device
Device
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 2 Interventional Results available

Effects of Gabapentin Versus Placebo on Buprenorphine Detoxification of Opioid-dependent Individuals

NCT01262092
View directory record Official record
Conditions
Opioid Dependence, Opioid Withdrawal, Opioid Detoxification
Interventions
Buprenorphine
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jun 20, 2013 · Synced Sep 28, 2026, 2:11 AM EDT
Recruiting Phase 2 Interventional

Prescription Opioids, Brain Structure, and Cognition in Older Adults With Chronic Pain

NCT06837857
View directory record Official record
Conditions
Pain, Chronic
Interventions
Opioid, Opioid Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
65 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Withdrawn Phase 4 Interventional

Anti-suicidal Effects of Buprenorphine in Opioid Use Disorder

NCT04234516
View directory record Official record
Conditions
Opioid-use Disorder, Suicidal Ideation
Interventions
Buprenorphine/Naloxone 8/2 milligram (mg) Sublingual Film, Morphine Sulfate 30 mg
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 17, 2021 · Synced Sep 28, 2026, 2:11 AM EDT
Recruiting Phase 4 Interventional

Continuous vs Intermittent Ketorolac for Pain Control in Peds CV Surgery

NCT04040452
View directory record Official record
Conditions
Congenital Heart Disease in Children
Interventions
Continuous ketorolac
Drug
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
3 Months to 59 Months
Enrollment
166 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 1 Interventional

Drug Discrimination in Methadone-Maintained Humans Study 1

NCT00593463
View directory record Official record
Conditions
Drug Dependence
Interventions
Cycloserine, Diltiazem, Gabapentin, Isradipine, Naloxone, Nifedipine, Placebo, Saline, Verapamil
Drug · Device
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Mar 10, 2011 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 2 Interventional Results available

Medical Management of Sleep Disturbance During Opioid Tapering

NCT03789214
View directory record Official record
Conditions
Opioid Dependence, Opioid Withdrawal, Sleep Disturbance
Interventions
Placebo oral capsule, Low Dose Suvorexant, High Dose Suvorexant
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 7, 2022 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Not applicable Interventional Results available

TrueRelief Efficacy for Post-cesarean Pain (ELECTRON)

NCT05250830
View directory record Official record
Conditions
Post-cesarean Pain
Interventions
TrueRelief device, Sham TrueRelief device
Device
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Sep 28, 2026, 2:11 AM EDT
Withdrawn Phase 3 Interventional

Endogenous Opioid Modulation by Ketamine

NCT03051945
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ketamine Hydrochloride, Normal saline
Drug · Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 27, 2020 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Hydrocodone Bitartrate (HYD) in Subjects With Moderate to Severe Chronic Low Back Pain

NCT01452529
View directory record Official record
Conditions
Chronic Low Back Pain
Interventions
Hydrocodone bitartrate q24h film-coated tablets, Placebo to match hydrocodone bitartrate q24h tablets
Drug
Lead sponsor
Purdue Pharma LP
Industry
Eligibility
18 Years and older
Enrollment
905 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
102
States / cities
Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 83 more
Source: ClinicalTrials.gov public record
Updated Mar 9, 2020 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 3 Interventional Results available

Study Of The Efficacy And Safety Of Pregabalin Compared To Placebo For Treatment Of Post-Surgical Pain From Hysterectomy

NCT00468845
View directory record Official record
Conditions
Pain, Postoperative
Interventions
pregabalin (Lyrica), matched placebo
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
25 Years to 70 Years · Female only
Enrollment
501 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
14
States / cities
Mobile, Alabama • Glendale, Arizona • Phoenix, Arizona + 6 more
Source: ClinicalTrials.gov public record
Updated Feb 9, 2021 · Synced Sep 28, 2026, 2:11 AM EDT
Not listed Phase 4 Interventional

Dronabinol for Post-operative Pain After Lumbar Fusion

NCT04346407
View directory record Official record
Conditions
Post-operative Pain
Interventions
Dronabinol 2.5mg Cap, Placebo
Drug
Lead sponsor
Jeffrey L Gum MD
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 11, 2021 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

A Multiple Dose Study of TD-1211 in Healthy Volunteers and Patients With Opioid-Induced Constipation

NCT01040637
View directory record Official record
Conditions
Healthy, Opioid-induced Constipation
Interventions
TD-1211, Placebo
Drug
Lead sponsor
Glycyx Therapeutics
Industry
Eligibility
18 Years to 65 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
3
States / cities
Pasadena, California • San Antonio, Texas • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Can Post-operative TAP Block Improve Quality of Recovery After C-sections in Patients on Methadone Maintenance?

NCT01644864
View directory record Official record
Conditions
Uncontrolled Postoperative Pain
Interventions
0.375% ROPIVACAINE, placebo
Drug
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years to 40 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 7, 2017 · Synced Sep 28, 2026, 2:11 AM EDT
Recruiting Phase 2 Interventional

Assessing a Clinically-meaningful Opioid Withdrawal Phenotype

NCT05027919
View directory record Official record
Conditions
Opioid Withdrawal, Opioid Use Disorder, Opioid Craving
Interventions
Hydromorphone, Naloxone + lofexidine pretreatment, Naloxone + placebo pretreatment, Lofexidine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 28, 2026, 2:11 AM EDT
Terminated Not applicable Interventional Results available

Effect of Guanfacine on the Reversal of Opioid-induced Hyperalgesia (OIH)

NCT02192398
View directory record Official record
Conditions
Chronic Pain
Interventions
Guanfacine, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 1 Interventional Results available

A Study to Assess the Effect of a Single Dose of ASP8062 on the Multiple Dose Safety, Tolerability and Pharmacokinetics of Buprenorphine/Naloxone in Participants With Opioid Use Disorder

NCT04447287
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
ASP8062, Placebo ASP8062, buprenorphine/naloxone
Drug
Lead sponsor
Astellas Pharma Global Development, Inc.
Industry
Eligibility
18 Years to 60 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Sep 28, 2026, 2:11 AM EDT
Completed Phase 2 Interventional Results available

A Phase 2a, Proof-of-Concept Study of GIC-1001 in the Management of Visceral Pain During Sedation-Free, Full Colonoscopy

NCT01926444
View directory record Official record
Conditions
Pain, Cancer, Colonic Diseases
Interventions
GIC-1001
Drug
Lead sponsor
gicare Pharma Inc.
Industry
Eligibility
40 Years to 70 Years
Enrollment
308 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
11
States / cities
Scottsdale, Arizona • Anaheim, California • Chula Vista, California + 8 more
Source: ClinicalTrials.gov public record
Updated May 7, 2019 · Synced Sep 28, 2026, 2:11 AM EDT