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ClinicalTrials.gov public records Last synced Sep 18, 2026, 6:54 PM EDT

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Showing 1–18 of 18 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Acetaminophen 500Mg Tab Clear all
Not listed Phase 3 Interventional Accepts healthy volunteers

Pain Management After Surgery

NCT05154682
View directory record Official record
Conditions
Pain, Postoperative
Interventions
OxyCODONE 5 mg Oral Tablet, Acetaminophen 500Mg Tab, Naproxen 500 Mg
Drug
Lead sponsor
Rothman Institute Orthopaedics
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 12, 2021 · Synced Sep 18, 2026, 6:54 PM EDT
Withdrawn Phase 2 Interventional

Maxi-Analgesic Phase 2 Study to Compare the Analgesic Effects in Different Dosing Groups to Treat Teeth Extraction Pain

NCT01104844
View directory record Official record
Conditions
Dental Pain
Interventions
Full Dose Strength, Quarter dose strength, Half dose strength, Acetaminophen standard dose, Ibuprofen low dose, Ibuprofen high dose, Placebo
Drug
Lead sponsor
AFT Pharmaceuticals, Ltd.
Industry
Eligibility
16 Years to 40 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 11, 2013 · Synced Sep 18, 2026, 6:54 PM EDT
Active, not recruiting Phase 2 Interventional

Project 1 Aim 2, Adaptations of the Brain in Chronic Pain With Opioid Exposure

NCT05463367
View directory record Official record
Conditions
Opioid Use, Opioid Dependence, Opioid-use Disorder, Narcotic Use, Back Pain, Back Injuries, Chronic Pain, Chronic Low-back Pain, Pain, Chronic, Pain;Back Low;Chronic, Pain, Back
Interventions
Carbidopa-Levodopa 25 Mg-100 Mg Oral Tablet, Naproxen 500 Mg, Opioids
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 26, 2024 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial of Oral Acetaminophen for Analgesic Control After Transvaginal Oocyte Retrieval

NCT02418182
View directory record Official record
Conditions
Pain
Interventions
Acetaminophen, placebo
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
99 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Feb 17, 2020 · Synced Sep 18, 2026, 6:54 PM EDT
Enrolling by invitation Phase 4 Interventional

Musculoskeletal Outcomes Using Tylenol/Ibuprofen vs. Oral Steroids in New Injuries

NCT07393503
View directory record Official record
Conditions
Musculoskeletal Pain
Interventions
Methylprednisolone 4Mg Tab, Acetaminophen 500Mg Tab, Ibuprofen 200Mg Oral Tablet
Drug
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Sep 18, 2026, 6:54 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Reduced Opioid Prescription After Laparoscopic Hysterectomy

NCT05548582
View directory record Official record
Conditions
Pain, Postoperative, Opioid Misuse, Opioid Use, Pain
Interventions
OxyCODONE 5 mg Oral Tablet, Acetaminophen 500 mg Tab, Ibuprofen 600 mg
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 11, 2026 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Not applicable Interventional Results available

Evaluation of Stepped Care for Chronic Pain in Iraq/Afghanistan Veterans (ESCAPE)

NCT00386243
View directory record Official record
Conditions
Low Back Pain, Pain, Pain, Intractable
Interventions
Cognitive behavioral therapy, Pain self-management program, Co-Analgesic Therapy, Opioid Analgesics
Behavioral · Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
242 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 4, 2019 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Ambulatory Gynecologic Surgery: Finding the Optimal Opioid Prescription

NCT03588910
View directory record Official record
Conditions
Surgery
Interventions
Acetaminophen, Ibuprofen 600 mg, Oxycodone
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Aug 12, 2021 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 3 Interventional Results available

TREXIMET® Versus Butalbital-containing Combination Medications for the Acute Treatment of Migraine in Adults

NCT00573170
View directory record Official record
Conditions
Migraine Disorders, Migraine, Acute
Interventions
TREXIMET®, Butalbital-containing Combination Medications (BCM), placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
375 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
107
States / cities
Chandler, Arizona • Gilbert, Arizona • Litchfield Park, Arizona + 94 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2010 · Synced Sep 18, 2026, 6:54 PM EDT
Enrolling by invitation Not applicable Interventional

Physiological Effects of N-Acetyl Cysteine in Patients With Multiple Sclerosis

NCT03032601
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
N-acetyl Cysteine
Dietary Supplement
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 4 Interventional

Minimizing Narcotic Analgesics After Endocrine Surgery

NCT03469310
View directory record Official record
Conditions
Thyroid Cancer, Thyroid Nodule, Thyroid Neoplasms, Thyroid Goitre, Thyroid Diseases, Parathyroid Diseases, Parathyroid Adenoma, Parathyroid Hyperplasia
Interventions
Acetaminophen 500Mg Cap, Tylenol #3 Oral Tablet, Tramadol
Drug
Lead sponsor
Minerva A Romero Arenas
Other
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Edinburg, Texas
Source: ClinicalTrials.gov public record
Updated May 10, 2021 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of IV Acetaminophen Versus Oral Acetaminophen

NCT03365622
View directory record Official record
Conditions
Nephrectomy
Interventions
Acetaminophen, Placebos, Placebo Oral Tablet
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 89 Years
Enrollment
214 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jun 28, 2025 · Synced Sep 18, 2026, 6:54 PM EDT
Not yet recruiting Phase 3 Interventional

A Study of Combogesic® 325 in Adolescent Patients With Moderate to Severe Postoperative Pain Associated With Orthopedic Surgery

NCT07225140
View directory record Official record
Conditions
Post Operative Pain, Acute
Interventions
Combogesic® tablets, Acetaminophen 500mg, Placebo
Drug
Lead sponsor
AFT Pharmaceuticals, Ltd.
Industry
Eligibility
12 Years to 17 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 18, 2026, 6:54 PM EDT
Terminated Phase 4 Interventional Results available

Clinical, Pharmacological and Molecular Effects of IV and Oral Acetaminophen in Adults With aSAH

NCT02549716
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Stroke
Interventions
IV acetaminophen, Oral acetaminophen, Oral placebo, IV placebo
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 9, 2019 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 1 Interventional

Pain Medications Following Thyroidectomy and Parathyroidectomy

NCT03640247
View directory record Official record
Conditions
Thyroid Disease, Parathyroid Diseases
Interventions
Non-narcotic group regimen, Narcotic group regimen
Drug
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 25, 2019 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 3 Interventional Results available

A Study of Ibuprofen (IBU) 250mg/APAP 500mg In The Treatment Of Post-Surgical Dental Pain

NCT02837952
View directory record Official record
Conditions
Pain
Interventions
FDC IBU/APAP 250 mg/500 mg, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 40 Years
Enrollment
123 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Mar 4, 2018 · Synced Sep 18, 2026, 6:54 PM EDT
Completed Phase 3 Interventional

Analgesic Effects of Cannabidiol for Simple Tooth Extractions in Dental Patients

NCT04271917
View directory record Official record
Conditions
Pain, Acute
Interventions
cannabidiol, placebo, acetaminophen 500mg and ibuprofen 200mg combo
Drug
Lead sponsor
University of Tennessee
Other
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 1, 2022 · Synced Sep 18, 2026, 6:54 PM EDT
Terminated Phase 4 Interventional Results available

Opioid & Steroid Use Following Tonsillectomy in Pediatric Patients

NCT04541147
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Dexamethasone, Analgesics
Drug
Lead sponsor
Duke University
Other
Eligibility
4 Years to 17 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 26, 2024 · Synced Sep 18, 2026, 6:54 PM EDT