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

Preoperative Acetaminophen and Carbohydrate Loading

NCT03131713
View directory record Official record
Conditions
Non-melanoma Skin Cancer
Interventions
Acetaminophen
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
101 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 6, 2019 · Synced Sep 12, 2026, 6:46 PM EDT
Not listed Phase 2Phase 3 Interventional

Metabolism and Toxicity of Acetaminophen

NCT01328808
View directory record Official record
Conditions
Pain
Interventions
Acetaminophen/APAP
Drug
Lead sponsor
John van den Anker
Other
Eligibility
22 Weeks to 37 Weeks
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2022
U.S. locations
2
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 1, 2022 · Synced Sep 12, 2026, 6:46 PM EDT
Withdrawn Phase 2 Interventional

Efficacy of Acetaminophen in Posterior Fossa Surgery

NCT02532322
View directory record Official record
Conditions
Arnold-Chiari Malformation, Posterior Fossa Tumors
Interventions
IV acetaminophen, normal saline
Drug
Lead sponsor
Children's National Research Institute
Other
Eligibility
2 Years to 12 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Apr 7, 2021 · Synced Sep 12, 2026, 6:46 PM EDT
Not listed Not applicable Interventional

Efficacy of IV Acetaminophen in Acute Post-Operative Pain Control in Laparoscopic Roux-en-Y Gastric Bypass Surgery (LRYGBP) Patients

NCT01460667
View directory record Official record
Conditions
Morbid Obesity
Interventions
IV acetaminophen, IV normal saline
Drug
Lead sponsor
McLaren Regional Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 26, 2011 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acute Pediatric Fracture Analgesia Study

NCT00520442
View directory record Official record
Conditions
Fracture
Interventions
ibuprofen, acetamin w codeine
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
4 Years to 18 Years
Enrollment
335 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2007
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 6, 2008 · Synced Sep 12, 2026, 6:46 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Acetaminophen Biomarkers

NCT01005173
View directory record Official record
Conditions
Acetaminophen Toxicity
Interventions
Not listed
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
1 Year to 18 Years
Enrollment
253 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2009
U.S. locations
8
States / cities
Little Rock, Arkansas • Washington D.C., District of Columbia • Louisville, Kentucky + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 23, 2017 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Not applicable Interventional Results available

The Impact of IV Acetaminophen on Pain After Appendectomy for Perforated Appendicitis

NCT02881996
View directory record Official record
Conditions
Perforated Appendicitis
Interventions
IV tylenol, No IV tylenol, Ketorolac
Drug
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
2 Years to 17 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 11, 2021 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Not applicable Interventional

Oral vs Intravenous Acetominophen for Postoperative Pain in Minimally Invasive Gynecologic Surgery

NCT03391284
View directory record Official record
Conditions
Post-operative Pain
Interventions
acetominophen, Acetaminophen
Drug
Lead sponsor
Scripps Health
Other
Eligibility
18 Years and older · Female only
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
2
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 21, 2022 · Synced Sep 12, 2026, 6:46 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Equality Study of Ofirmev vs Oral Acetaminophen

NCT01711229
View directory record Official record
Conditions
Pain, Postoperative
Interventions
IV acetaminophen, oral acetaminophen
Drug
Lead sponsor
Babiash, Kimberly H., M.D.
Individual
Eligibility
18 Years and older
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Wichita, Kansas
Source: ClinicalTrials.gov public record
Updated Jan 27, 2015 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Hepatic Function During and Following Three Days of Acetaminophen Dosing in Alcoholics

NCT00402571
View directory record Official record
Conditions
Alcohol Related Disorders
Interventions
acetaminophen
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2004
U.S. locations
2
States / cities
Denver, Colorado • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 8, 2009 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 4 Interventional Results available

Improving Post-Operative Pain and Recovery in Gynecologic Surgery

NCT04175509
View directory record Official record
Conditions
Postoperative Pain, Opioid Use, Acetaminophen
Interventions
Rectal acetaminophen, Intravenous acetaminophen
Drug
Lead sponsor
Aultman Health Foundation
Other
Eligibility
18 Years and older · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Canton, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 19, 2022 · Synced Sep 12, 2026, 6:46 PM EDT
Not listed Phase 2 Interventional

Intravenous Acetaminophen for Craniotomy Patients

NCT01474304
View directory record Official record
Conditions
Craniotomy
Interventions
Acetaminophen
Drug
Lead sponsor
Swedish Medical Center
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 28, 2016 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 3 Interventional

PANDORA: Delirium Prevention After Cardiac Surgery Using IV Acetaminophen to Prevent Postoperative Delirium in Older Cardiac Surgical Patients

NCT04093219
View directory record Official record
Conditions
Delirium in Old Age, Delirium, Coronary Artery Disease
Interventions
IV acetaminophen, Placebo
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
60 Years and older
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
10
States / cities
Birmingham, Alabama • Irvine, California • Los Angeles, California + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 12, 2026, 6:46 PM EDT
Recruiting Phase 3 Interventional

Suzetrigine Frame Trial Comparing Suzetrigine and Acetaminophen

NCT07525219
View directory record Official record
Conditions
Analgesic Efficacy
Interventions
Suzetrigine, acetaminophen
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
21 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Sep 12, 2026, 6:46 PM EDT
Terminated Phase 3 Interventional

Acetaminophen vs Placebo in the Pre-operative Setting and Outcomes on Post-operative Pain, Nausea and Vomiting

NCT02102555
View directory record Official record
Conditions
Post Operative Pain, Post Operative Nausea and Vomiting
Interventions
IV acetaminophen, placebo
Drug
Lead sponsor
MercyOne Des Moines Medical Center
Other
Eligibility
18 Years and older · Female only
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Des Moines, Iowa
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 3 Interventional

The Safety and Efficacy of the Buprenorphine Transdermal Delivery System in Subjects With Chronic Back Pain.

NCT00315887
View directory record Official record
Conditions
Chronic Low Back Pain
Interventions
Buprenorphine transdermal delivery system
Drug
Lead sponsor
Purdue Pharma LP
Industry
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999
U.S. locations
22
States / cities
Huntsville, Alabama • Phoenix, Arizona • Waterbury, Connecticut + 19 more
Source: ClinicalTrials.gov public record
Updated May 2, 2006 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Not applicable Interventional Results available

Intraoperative and Post-operative Analgesic Effect of IV Acetaminophen for Sinus Surgery

NCT01608308
View directory record Official record
Conditions
Chronic Sinusitis
Interventions
IV Acetaminophen, Placebo
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 68 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 15, 2015 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Not applicable Interventional Results available

Perioperative Systemic Acetaminophen to Improve Postoperative Quality of Recovery After Ambulatory Breast Surgery

NCT01852955
View directory record Official record
Conditions
Pain
Interventions
IV acetaminophen, Placebo
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 13, 2016 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Acetaminophen Transfer Across the Placenta and the Assessment of Fetal Well-being

NCT01211912
View directory record Official record
Conditions
Fetal Testing, Transplacental Transfer of Acetaminophen
Interventions
Arm 1 (20 patients), Arm 2 (34 patients)
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 31, 2014 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Comparative Bioavailability Study of Codeine Sulfate

NCT01010152
View directory record Official record
Conditions
Pain
Interventions
Codeine Sulfate
Drug
Lead sponsor
Roxane Laboratories
Industry
Eligibility
18 Years to 45 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 4 Interventional Results available

OTC Naproxen and Acetaminophen Anti-Inflammatory Action in Dental Implant Patients

NCT04694300
View directory record Official record
Conditions
Osseointegrated Dental Implantation, Pain, Acute
Interventions
Naproxen, Acetaminophen, Tramadol
Drug
Lead sponsor
Hersh, Elliot V., DMD, MS, PhD
Individual
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 15, 2024 · Synced Sep 12, 2026, 6:46 PM EDT
Completed No phase listed Observational

Treatment of Acetaminophen Toxicity With N-acetylcysteine

NCT00725179
View directory record Official record
Conditions
Acetaminophen Toxicity
Interventions
Not listed
Lead sponsor
Akron Children's Hospital
Other
Eligibility
Not listed
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Akron, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 8, 2011 · Synced Sep 12, 2026, 6:46 PM EDT
Completed Phase 2 Interventional Results available

A Dental Pain Study to Test the Effectiveness of a New Pain Reliever Medicine

NCT02209181
View directory record Official record
Conditions
Pain
Interventions
JNJ-10450232 / Not yet marketed, acetaminophen / Tylenol
Drug
Lead sponsor
McNeil Consumer Healthcare Division of McNEIL-PPC, Inc.
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
269 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 2, 2017 · Synced Sep 12, 2026, 6:46 PM EDT
Recruiting Phase 4 Interventional

Supracondylar Post-Operative Pain Study

NCT03759028
View directory record Official record
Conditions
Supracondylar Humerus Fracture
Interventions
Ibuprofen, Oxycodone, Acetaminophen
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
4 Years to 12 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Sep 12, 2026, 6:46 PM EDT