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ClinicalTrials.gov public records Last synced Oct 23, 2026, 10:33 AM EDT

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Showing 505–528 of 979 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: APAP Clear all
Completed Not applicable Interventional

A Pilot Study Examining the Efficacy of Biomodulator Treatment for Chronic Low Back Pain

NCT02707094
View directory record Official record
Conditions
Chronic Low Back Pain
Interventions
Biomodulator, Usual Care (Medication + Exercise)
Device · Other
Lead sponsor
Brooke Army Medical Center
Federal
Eligibility
18 Years to 62 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Fort Sam Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 5, 2018 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Study to Collect Information on How Well the Study Drug Naproxen Sodium Tablets Works Compared to Hydrocodone/Acetaminophen Tablets in Order to Relieve Pain in Participants Experiencing Moderate to Severe Pain After Having Their Wisdom Teeth Removed

NCT04307940
View directory record Official record
Conditions
Pain
Interventions
Naproxen Sodium (Aleve, BAY117031), Hydrocodone/Acetaminophen, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years to 40 Years
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 14, 2022 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Efficacy and Safety of Acetaminophen, Aspirin and Caffeine With Sumatriptan in the Acute Treatment of Migraine

NCT01248468
View directory record Official record
Conditions
Pain, Migraine
Interventions
Aspirin, acetaminophen and caffeine, Sumatriptan, Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older
Enrollment
752 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
20
States / cities
Anaheim, California • San Francisco, California • Clearwater, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2012 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Anterior Cruciate Ligament Pain Study

NCT02604550
View directory record Official record
Conditions
Anterior Cruciate Ligament Reconstruction
Interventions
Ropivacaine 0.5%, Percocet 7.5/325, Naprosyn 500 mg
Drug
Lead sponsor
Emory University
Other
Eligibility
Not listed
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 31, 2017 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Preoperative Gabapentin vs Placebo for Vaginal Prolapse Surgery

NCT05658887
View directory record Official record
Conditions
Pelvic Organ Prolapse, Perioperative/Postoperative Complications
Interventions
Gabapentin, Gabapentin Placebo
Drug
Lead sponsor
Joseph Kowalski
Other
Eligibility
18 Years and older · Female only
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Aug 12, 2025 · Synced Oct 23, 2026, 10:33 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers Results available

Predictors of Postoperative Pain Following Oocyte Retrieval for Assisted Reproduction

NCT03105518
View directory record Official record
Conditions
Oocyte Retrieval, Postoperative Pain
Interventions
Fentanyl, Acetaminophen, Oxycodone
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 23, 2026, 10:33 AM EDT
Enrolling by invitation No phase listed Observational

Evaluating the Efficacy of Intravenous Acetaminophen (IV Tylenol) in Reducing Pain and Agitation in Pediatric Patients Undergoing Elective Tonsillectomy and/or Adenoidectomy

NCT07576985
View directory record Official record
Conditions
Tonsillectomy, Adenoidectomy
Interventions
No Intervention: Observational Cohort
Other
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
Up to 8 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 8, 2026 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 3 Interventional

Toward Better Outcomes in Osteoarthritis

NCT00000425
View directory record Official record
Conditions
Osteoarthritis
Interventions
Nonsteroidal anti-inflammatory drugs (NSAIDs), Acetaminophen
Drug
Lead sponsor
Stanford University
Other
Eligibility
50 Years to 85 Years
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2001
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 3, 2013 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 3 Interventional Results available

Transversus Abdominis Plane Block in Microsurgical Breast Recon w/Abdominal Free Flap in Breast CA

NCT02601027
View directory record Official record
Conditions
Breast - Female
Interventions
Transversus Abdominis Plane (TAP) block, Nimbus Infusion Pump IV Administration, Bupivacaine infusion, Acetominophen, Hydromorphone, Oxycodone, Ondansetron
Procedure · Device · Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 23, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Completed No phase listed Observational

Treatment of APAP Toxicity With IV and Oral NAC 2008-2011

NCT01465542
View directory record Official record
Conditions
Acetaminophen Toxicity
Interventions
Not listed
Lead sponsor
Akron Children's Hospital
Other
Eligibility
1 Month to 21 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
1
States / cities
Akron, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 25, 2023 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 1 Interventional Results available

Safety and Pharmacokinetic (PK) Study of Intravenous (IV) Acetaminophen Administration in Pediatric Inpatients

NCT00493246
View directory record Official record
Conditions
Pain, Fever
Interventions
IV Acetaminophen
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
29 Days to 16 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
5
States / cities
Stanford, California • Ann Arbor, Michigan • Durham, North Carolina + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2016 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Analgesia Regimens Following Trans-sphenoidal Surgery for Pituitary Tumors

NCT02351700
View directory record Official record
Conditions
Pituitary Tumor, Pain
Interventions
IV Caldolor, IV Placebo
Drug
Lead sponsor
St. Joseph's Hospital and Medical Center, Phoenix
Other
Eligibility
18 Years to 79 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 4 Interventional Results available

Effect of IV Acetaminophen on Patients in the Neurocritical Care Unit

NCT01948505
View directory record Official record
Conditions
Post-operative Craniotomy Patients, Carotid Endarterectomy and Carotid Artery Stenosis Patients, Post-op Spine Patients Admitted to the NCCU, Endovascular Patients Undergoing Intracranial Intervention, Traumatic Brain Injuries NPO for at Least 12 Hours
Interventions
Intravenous acetaminophen, Placebo for IV acetaminophen
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 90 Years
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Oct 23, 2026, 10:33 AM 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 24, 2017 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Not applicable Interventional

Evaluation of the Interaction Between Acetaminophen and Zidovudine

NCT00000731
View directory record Official record
Conditions
HIV Infections
Interventions
Zidovudine, Acetaminophen
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1990
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Not applicable Interventional Results available

DDN in Stroke--COBRE

NCT05196737
View directory record Official record
Conditions
Stroke, Spasticity, Muscle, CVA
Interventions
Dry Needling
Behavioral
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 3 Interventional Results available

Randomized, Double-Blind, Single-Dose, Efficacy and Safety Study of Test Acetaminophen Tablet in Postoperative Dental Pain

NCT03224403
View directory record Official record
Conditions
Post-operative Dental Pain
Interventions
Test acetaminophen, Commercial acetaminophen, Commercial ibuprofen, Placebo
Drug
Lead sponsor
Johnson & Johnson Consumer Inc., McNeil Consumer Healthcare Division
Industry
Eligibility
17 Years to 50 Years
Enrollment
664 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 15, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Terminated Phase 4 Interventional Results available

Treating Urological Chronic Pelvic Pain Syndrome (UCPPS) Pain

NCT02385266
View directory record Official record
Conditions
Chronic Prostatitis With Chronic Pelvic Pain Syndrome
Interventions
D-Cycloserine, Placebo (for D-cycloserine)
Drug
Lead sponsor
Northwestern University
Other
Eligibility
18 Years and older · Male only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 17, 2023 · Synced Oct 23, 2026, 10:33 AM 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 8, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 2 Interventional Results available

Early Administration of ATG Followed by Cyclophosphamide, Busulfan and Fludarabine Before a Donor Stem Cell Transplant in Patients With Hematological Cancer

NCT00787761
View directory record Official record
Conditions
Myeloproliferative Disorders, Kidney Cancer, Leukemia, Lymphoma, Multiple Myeloma and Plasma Cell Neoplasm, Myelodysplastic Syndromes, Myelodysplastic/Myeloproliferative Diseases
Interventions
anti-thymocyte globulin, busulfan, cyclophosphamide, fludarabine phosphate, methotrexate, tacrolimus, nonmyeloablative allogeneic HSCT
Biological · Drug · Procedure
Lead sponsor
Northside Hospital, Inc.
Other
Eligibility
Up to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 1, 2012 · Synced Oct 23, 2026, 10:33 AM EDT
Active, not recruiting Phase 2 Interventional

131I-Omburtamab, in Recurrent Medulloblastoma and Ependymoma

NCT04743661
View directory record Official record
Conditions
Recurrent Medulloblastoma, Recurrent Ependymoma
Interventions
Irinotecan, Temozolomide, Bevacizumab, Omburtamab I-131, Liothyronine, SSKI, Dexamethasone, Antipyretic, Antihistamine, anti-emetics
Drug
Lead sponsor
Pediatric Brain Tumor Consortium
Network
Eligibility
Up to 21 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
3
States / cities
Los Angeles, California • New York, New York • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Oct 23, 2026, 10:33 AM EDT
Withdrawn Phase 4 Interventional

APAP-CYS Protein Adduct Concentrations in Patients With Liver-Directed Therapy Intended to Treat Hepatic Tumors

NCT02911961
View directory record Official record
Conditions
Acetaminophen Exposure
Interventions
Acetaminophen
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
21 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 2, 2021 · Synced Oct 23, 2026, 10:33 AM EDT
Completed Phase 2 Interventional

Chiropractic Care, Medication, and Self-Care for Neck Pain

NCT00029770
View directory record Official record
Conditions
Neck Pain
Interventions
Chiropractic spinal manipulation, Acetaminophen, Self-care, Non-Steroidal anti-inflammatory drugs (NSAIDS), Tylenol with codeine
Procedure · Drug · Behavioral
Lead sponsor
National Center for Complementary and Integrative Health (NCCIH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2007
U.S. locations
1
States / cities
Bloomington, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 25, 2008 · Synced Oct 23, 2026, 10:33 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Use of IV Acetaminophen in the Treatment of Post Operative Pain in Patients Undergoing Craniotomy and Spine Surgery

NCT03261310
View directory record Official record
Conditions
Postoperative Pain
Interventions
Acetaminophen or Placebo
Drug
Lead sponsor
Brooke Army Medical Center
Federal
Eligibility
18 Years to 90 Years
Enrollment
55 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 25, 2017 · Synced Oct 23, 2026, 10:33 AM EDT