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ClinicalTrials.gov public records Last synced Oct 22, 2026, 8:24 AM EDT

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Showing 1–24 of 261 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Acetaminophen Alone Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Drug Interactions Between Morphine and Orally or IV Administered Acetaminophen

NCT02848729
View directory record Official record
Conditions
Pain
Interventions
Oral Acetaminophen, IV Acetaminophen, IV Morphine, Placebo Tablets, Saline
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
3
States / cities
Tucson, Arizona • Naples, Florida • Kingston, Rhode Island
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study Comparing the Efficacy and Safety of Orally Administered Ibuprofen and Placebo in Delayed Onset Muscle Soreness

NCT02113566
View directory record Official record
Conditions
Delayed Onset Muscle Soreness
Interventions
Acetaminophen 1000mg
Drug
Lead sponsor
Jean Brown Research
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Oct 22, 2026, 8:24 AM EDT
Recruiting Phase 1Phase 2 Interventional

A Clinical Study of MK-2870 Alone or With Other Treatments to Treat Gastrointestinal Cancers (MK-9999-02A)

NCT06428409
View directory record Official record
Conditions
Colorectal Cancer, Pancreatic Ductal Adenocarcinoma, Biliary Tract Cancer
Interventions
Sacituzumab tirumotecan, Fluorouracil (5-FU), Leucovorin (LV) or levoleucovorin, Rescue medication, Supportive care measures, Cisplatin, Pembrolizumab
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
13
States / cities
Los Angeles, California • Aurora, Colorado • Washington D.C., District of Columbia + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional Results available

Hydrocodone/Acetaminophen for Acute Pain Following Bunionectomy

NCT01038609
View directory record Official record
Conditions
Pain
Interventions
Hydrocodone/Acetaminophen Extended Release, Acetaminophen, Morphine Extended Release, Placebo
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
18 Years to 75 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
4
States / cities
Peoria, Arizona • Austin, Texas • San Marcos, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2014 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 3 Interventional

Evaluate the Time of Pain Relief of Fast Acting Aspirin Versus Acetaminophen in Subjects Diagnosed With Sore Throat Pain

NCT01453400
View directory record Official record
Conditions
Pharyngitis
Interventions
Acetylsalicylic Acid (Aspirin, BAY1019036) + placebo, Acetaminophen + placebo, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years and older
Enrollment
177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 7, 2018 · Synced Oct 22, 2026, 8:24 AM EDT
Terminated Phase 3 Interventional Results available

Symptomatic Management of Lyme Arthritis

NCT04038346
View directory record Official record
Conditions
Lyme Arthritis, Lyme Disease, Arthritis
Interventions
Naproxen, Acetaminophen
Drug
Lead sponsor
Desiree Neville, MD
Other
Eligibility
3 Years to 17 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 17, 2025 · Synced Oct 22, 2026, 8:24 AM EDT
Terminated Phase 2 Interventional Results available

Randomized Controlled Trial to Evaluate the Safety and Efficacy of Acetaminophen in Preterm Infants Used in Combination With Ibuprofen for Closure of the Ductus Arteriosus

NCT03701074
View directory record Official record
Conditions
Patent Ductus Arteriosus, Preterm Infant, Bronchopulmonary Dysplasia
Interventions
Ibuprofen and acetaminophen, Ibuprofen and placebo
Drug
Lead sponsor
University of South Alabama
Other
Eligibility
5 Days to 21 Days
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Mobile, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Not applicable Interventional Results available

Emergency Department (ED) Drug Interaction in Emergency Department Patients

NCT01859715
View directory record Official record
Conditions
Drug Interactions
Interventions
Oxycodone, Hydrocodone, Ondansetron
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 95 Years
Enrollment
502 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 5, 2016 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Mechanisms of Action of Acetaminophen

NCT00646906
View directory record Official record
Conditions
Myocardial Infarction, Arthritis
Interventions
Aspirin First, Aspirin Last, Acetaminophen 1000 mg/d, Acetaminophen 4000 mg/d, Ibuprofen 800 mg/d
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 55 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2012
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Oct 22, 2026, 8:24 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers Results available

Opioid-Free Pain Protocol After Shoulder Arthroplasty

NCT05488847
View directory record Official record
Conditions
Shoulder Arthropathy, Shoulder Pain
Interventions
Celecoxib, Pregabalin, Tramadol, Dexamethasone, Acetaminophen, Ropivicaine, Epinephrine, Ketorolac, Tizanidine, Magnesium, Ibuprofen, Oxycodone Hydrochloride 5 Mg
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional Results available

PECS Block vs. Multimodal Analgesia for Prevention of Persistent Postoperative Pain in Breast Surgery

NCT03084536
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Cancer of Breast
Interventions
Bupivacaine, Gabapentin, Celecoxib, Acetaminophen, Midazolam, Fentanyl
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 24, 2024 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional

HTX-011 Administration Study in Planned Caesarean Section Procedure

NCT03955211
View directory record Official record
Conditions
Analgesia
Interventions
HTX-011, Luer Lock Applicator, Ibuprofen, Acetaminophen
Drug · Device
Lead sponsor
Heron Therapeutics
Industry
Eligibility
18 Years and older · Female only
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
4
States / cities
Sheffield, Alabama • San Diego, California • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2022 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Early Phase 1 Interventional

NSAIDS Versus Opioids in Acute SER II Ankle Fractures

NCT02373254
View directory record Official record
Conditions
Ankle Fracture
Interventions
Ibuprofen, Acetaminophen/hydrocodone
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 60 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 14, 2017 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional

Low-Dose Naltrexone and Acetaminophen Combination in the Treatment of Chronic Low Back Pain (ANODYNE-4)

NCT03201393
View directory record Official record
Conditions
Chronic Low Back Pain, Lumbar Radiculopathy
Interventions
Low-dose naltrexone and acetaminophen combination, Placebo
Drug
Lead sponsor
Allodynic Therapeutics, Inc
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
North Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 14, 2021 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Safety of Intravenous Acetaminophen Vs Placebo for the Treatment of Endotoxin-Induced Fever in Healthy Adult Males

NCT00493311
View directory record Official record
Conditions
Fever
Interventions
IV Placebo, IV Acetaminophen, Reference Standard Endotoxin (RSE)
Drug · Biological
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 75 Years · Male only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Oct 19, 2016 · Synced Oct 22, 2026, 8:24 AM EDT
Withdrawn Early Phase 1 Interventional

Melphalan on Disease Burden Measured by Next Generation Sequencing Before AHCT (Autologous Hematopoietic Cell Transplant) for Multiple Myeloma

NCT05013437
View directory record Official record
Conditions
Multiple Myeloma
Interventions
Evomela, Next Generation Sequencing, Prochlorperazine, Acetaminophen, Diphenhydramine
Drug · Device
Lead sponsor
Koen van Besien
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Oct 22, 2026, 8:24 AM EDT
Terminated Phase 2 Interventional Results available

Nutritional Adequacy Therapeutic Enhancement in the Critically Ill. The NUTRIATE Study

NCT01934192
View directory record Official record
Conditions
Gastroparesis
Interventions
GSK962040 50 mg, Metoclopramide 10 mg, Placebo NG, Placebo IV
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 85 Years
Enrollment
91 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
4
States / cities
Aurora, Colorado • Augusta, Georgia • Louisville, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 11, 2017 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study of Ibuprofen 250 mg / Acetaminophen 500 mg Comparing The Antipyretic Effects in Healthy Male Volunteers

NCT02761980
View directory record Official record
Conditions
Fever
Interventions
Ibuprofen 250 mg / Acetaminophen 500 mg, Ibuprofen 250 mg, Acetaminophen 500 mg, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
290 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 7, 2018 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Combined Medication for Improved Analgesia in Superficial Pain

NCT02194088
View directory record Official record
Conditions
Pain
Interventions
Diclofenac and Atropine combination drug, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 3, 2018 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional

An Acute Migraine Factorial Study

NCT06245902
View directory record Official record
Conditions
Migraine With or Without Aura
Interventions
Naltrexone and Acetaminophen, Naltrexone and Acetaminophen-High Dose, Naltrexone Alone (regular dose), Acetaminophen Alone, Matching Placebo
Drug
Lead sponsor
Allodynic Therapeutics, Inc
Industry
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
North Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 7, 2024 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Not applicable Interventional

Effect of Number of Meals on Metabolism After Weight Loss Surgery

NCT02929212
View directory record Official record
Conditions
Morbid Obesity
Interventions
Solid Meal, Liquid Meal, Acetaminophen, Single, 600 kcal meal, Multiple, 200 kcal meals
Other · Drug
Lead sponsor
Columbia University
Other
Eligibility
21 Years to 60 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2017 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 4 Interventional Results available

A Study on The Safety of Administering Rituximab at A More Rapid Rate in Patients With Rheumatoid Arthritis

NCT01382940
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
rituximab, methotrexate, methylprednisolone, acetaminophen, antihistamine
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years and older
Enrollment
351 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
86
States / cities
Birmingham, Alabama • Tuscaloosa, Alabama • Gilbert, Arizona + 77 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2017 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Single-Dose PK Study of an Oxycodone/Acetaminophen Solution in Healthy Subjects

NCT02966860
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Oral solution OC/APAP
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Apr 5, 2017 · Synced Oct 22, 2026, 8:24 AM EDT
Completed Phase 2 Interventional Results available

Study of Allogeneic Umbilical Cord Blood Infusion for Adults With Ischemic Stroke

NCT03004976
View directory record Official record
Conditions
Stroke, Stroke, Acute, Brain Injury, Acute
Interventions
Umbilical Cord Blood, Placebo
Biological · Other
Lead sponsor
Joanne Kurtzberg, MD
Other
Eligibility
18 Years to 90 Years
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
6
States / cities
Aurora, Colorado • Gainesville, Florida • Atlanta, Georgia + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 6, 2022 · Synced Oct 22, 2026, 8:24 AM EDT