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ClinicalTrials.gov public records Last synced Oct 20, 2026, 10:54 PM EDT

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Showing 1–24 of 35 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Acetaminophen 500mg Clear all
Withdrawn Not applicable Interventional

Mag Con: Efficacy of Oral Mag. in Acute Concussion in Adolescents

NCT05065528
View directory record Official record
Conditions
Concussion, Mild, Traumatic Brain Injury, Mild
Interventions
Magnesium, Placebo
Dietary Supplement · Drug
Lead sponsor
Corewell Health South
Other
Eligibility
12 Years to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Saint Joseph, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 29, 2024 · Synced Oct 20, 2026, 10:54 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 Oct 16, 2026 · Synced Oct 20, 2026, 10:54 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 29, 2025 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 4 Interventional Results available

Minimal Opioid Use After Total Hip Replacement (THR)

NCT03090152
View directory record Official record
Conditions
Osteoarthritis, Hip
Interventions
Periarticular injection (Deep injection), Periarticular injection (Superficial injection), Bupivacaine, Placebo
Procedure · Drug
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
50 Years to 75 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 27, 2024 · Synced Oct 20, 2026, 10:54 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 27, 2024 · Synced Oct 20, 2026, 10:54 PM EDT
Withdrawn Phase 4 Interventional

A Pilot Study Investigating the Efficacy of Minocycline and N-Acetyl Cysteine for Bipolar Depression

NCT02719392
View directory record Official record
Conditions
Bipolar Disorder, Bipolar Depression
Interventions
N-acetylcysteine, Minocycline, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 24, 2026 · Synced Oct 20, 2026, 10:54 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 18, 2020 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Phase I/II Study of Immunotherapy Combination BN-Brachyury Vaccine, M7824, N-803 and Epacadostat (QuEST1)

NCT03493945
View directory record Official record
Conditions
Metastatic Castration-resistant Prostate Cancer, Prostate Cancer, Prostate Neoplasm, Advanced Solid Tumor, Solid Tumor, Non-metastatic Castration-resistant Prostate Cancer
Interventions
M7824, N-803, MVA-BN-Brachyury, FPV-Brachyury, Epacadostat, Acetaminophen, Ibuprofen, Naproxen, Benadryl, EKG, Bone scan, CT chest, abdomen and pelvis, MRI
Biological · Drug · Other + 1 more
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 120 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Oct 20, 2026, 10:54 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 5, 2019 · Synced Oct 20, 2026, 10:54 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 26, 2019 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 4 Interventional Results available

PO vs. IV Acetaminophen Given Perioperatively for 24 hr Post-op Pain Control Following Total Hip or Knee Replacement

NCT02244619
View directory record Official record
Conditions
Post-op Pain
Interventions
Oral acetaminophen, IV acetaminophen
Drug
Lead sponsor
Kettering Health Network
Other
Eligibility
18 Years and older
Enrollment
515 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Kettering, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 24, 2017 · Synced Oct 20, 2026, 10:54 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 27, 2024 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 4 Interventional Results available

A Randomized Study of Three Medication Regimens for Acute Low Back Pain

NCT01587274
View directory record Official record
Conditions
Acute Low Back Pain
Interventions
Naproxen, Cyclobenzaprine, Oxycodone/ acetaminophen
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
21 Years to 64 Years
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 31, 2018 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 2 Interventional Results available

Effects of Inhibiting Early Inflammation in Kidney Transplant Patients

NCT02495077
View directory record Official record
Conditions
Kidney Transplant
Interventions
Infliximab, Methylprednisolone, Mycophenolate Mofetil, Tacrolimus, Thymoglobulin®, Acetaminophen, Loratadine, Placebo for Infliximab, Prednisone, Diphenhydramine
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
290 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
13
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 8 more
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Oct 20, 2026, 10:54 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 10, 2019 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 4 Interventional Results available

Treatment of Acute Sinusitis

NCT00377403
View directory record Official record
Conditions
Acute Respiratory Infections, Acute Rhinosinusitis
Interventions
Acetaminophen, Amoxicillin, Dextromethorphan hydrobromide with guaifenesin, Guaifenesin, Pseudoephedrine Sustained Action, Saline spray (0.65%)
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 28, 2012 · Synced Oct 20, 2026, 10:54 PM EDT
Completed Phase 4 Interventional Results available

MAST Trial: Multi-modal Analgesic Strategies in Trauma

NCT03472469
View directory record Official record
Conditions
Nonspecific Pain Post Traumatic Injury
Interventions
Acetaminophen IV/PO, Acetaminophen PO, Ketorolac, Celebrex, Naproxen, Tramadol, Pregabalin, Gabapentin, Lidocaine, Opioids, Regional anesthesia
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
16 Years and older
Enrollment
1,561 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 18, 2021 · Synced Oct 20, 2026, 10:54 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 13, 2021 · Synced Oct 20, 2026, 10:54 PM EDT
Completed No phase listed Observational

Impact of Opioid Avoidance Protocol for ACL Reconstruction

NCT06340932
View directory record Official record
Conditions
ACL Tear, Post Operative Pain
Interventions
Iovera, Celecoxib, Acetaminophen, Oxycodone, Tramadol, Bupivacaine Hydrochloride, Acetaminophen 500Mg Cap
Device · Drug
Lead sponsor
Matthew Varacallo
Other
Eligibility
15 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
DuBois, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 7, 2025 · Synced Oct 20, 2026, 10:54 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 12, 2026 · Synced Oct 20, 2026, 10:54 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 29, 2010 · Synced Oct 20, 2026, 10:54 PM EDT
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 13, 2021 · Synced Oct 20, 2026, 10:54 PM EDT
Recruiting Phase 4 Interventional

Meloxicam in Mohs Micrographic Surgery

NCT07200544
View directory record Official record
Conditions
Postoperative Pain, Acute, Skin Cancer
Interventions
Meloxicam 7.5 mg, Meloxicam 15 mg, Acetaminophen 500mg
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 110 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 20, 2026, 10:54 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 5, 2018 · Synced Oct 20, 2026, 10:54 PM EDT