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ClinicalTrials.gov public records Last synced Oct 4, 2026, 2:37 AM EDT

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Showing 25–48 of 239 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Acetaminophen (Tylenol Extra Strength) Clear all
Enrolling by invitation Phase 4 Interventional

A Study of Intravenous Acetaminophen for Small Bowel Obstruction

NCT05878015
View directory record Official record
Conditions
Small Bowel Obstruction
Interventions
Acetaminophen
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Oct 4, 2026, 2:37 AM 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 2, 2022 · Synced Oct 4, 2026, 2:37 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

A Comparison of IV Versus PO Acetaminophen Postoperatively for Opioid Consumption After Cesarean Section

NCT04290208
View directory record Official record
Conditions
Postoperative Pain, Cesarean Section, Acetaminophen
Interventions
Acetaminophen, Placebos
Drug
Lead sponsor
Main Line Health
Other
Eligibility
18 Years and older · Female only
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Wynnewood, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 28, 2020 · Synced Oct 4, 2026, 2:37 AM EDT
Not listed Phase 4 Interventional

Multimodal Narcotic Limited Perioperative Pain Control With Colorectal Surgery

NCT02958566
View directory record Official record
Conditions
Colon Cancer, Colon Diverticulosis, Colonic Neoplasms, Colonic Diverticulitis, Pain, Postoperative, Ileus, Ileus Paralytic, Ileus; Mechanical, Constipation Drug Induced, Constipation, Rectum Cancer, Rectum Neoplasm
Interventions
Acetaminophen, Gabapentin, Orphenadrine, Lidocaine, Marcaine, Ketamine, Methadone, Tramadol, Ketorolac, Morphine Sulfate, Fentanyl, Dilaudid, Hydrocodone-Acetaminophen Tab 5-325 MG, HYDROCODONE/ACETAMINOPHEN 5 Mg-325 Mg ORAL TABLET
Drug
Lead sponsor
University of Illinois College of Medicine at Peoria
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Peoria, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 20, 2017 · Synced Oct 4, 2026, 2:37 AM EDT
Terminated Phase 4 Interventional Results available

Post-operative Analgesia in Elective, Soft-tissue Hand Surgery

NCT02029235
View directory record Official record
Conditions
Carpal Tunnel, Ganglion Cyst, Trigger Finger, De Quervain Disease
Interventions
Acetaminophen/Ibuprofen, Acetaminophen/Hydrocodone
Drug
Lead sponsor
Alexander Payatakes, M.D.
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 13, 2018 · Synced Oct 4, 2026, 2:37 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 4, 2026, 2:37 AM EDT
Recruiting Phase 2 Interventional

NSAID Use After Robotic Partial Nephrectomy

NCT05842044
View directory record Official record
Conditions
Kidney Cancer, Renal Cancer, Renal Neoplasm
Interventions
Ketorolac, Acetaminophen, Oxycodone, Hydromorphone, Ibuprofen
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 99 Years
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 24, 2026 · Synced Oct 4, 2026, 2:37 AM 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 4, 2026, 2:37 AM EDT
Withdrawn Phase 2Phase 3 Interventional

MgSO4 vs Metoclopramide for Headache in Pregnant Women

NCT00632606
View directory record Official record
Conditions
Headache
Interventions
magnesium sulfate, metoclopramide
Drug
Lead sponsor
Women and Infants Hospital of Rhode Island
Other
Eligibility
18 Years to 75 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Dec 25, 2012 · Synced Oct 4, 2026, 2:37 AM 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 4, 2026, 2:37 AM 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 12, 2021 · Synced Oct 4, 2026, 2:37 AM EDT
Completed Phase 4 Interventional Results available

Acetaminophen/Codeine vs Acetaminophen/Ibuprofen for Pain Control and Patient Satisfaction After Hand Surgery

NCT02647788
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Acetaminophen/Ibuprofen, Acetaminophen/Codeine
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 18, 2019 · Synced Oct 4, 2026, 2:37 AM 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 4, 2026, 2:37 AM EDT
Terminated Not applicable Interventional

Oral Versus Intravenous Acetaminophen for Postoperative Pain Control

NCT04662567
View directory record Official record
Conditions
Postoperative Pain, IVF
Interventions
acetaminophen
Drug
Lead sponsor
Northwell Health
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Nov 30, 2022 · Synced Oct 4, 2026, 2:37 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Effect of Post-operative Ibuprofen After Surgery for Chronic Rhinosinusitis

NCT03055507
View directory record Official record
Conditions
Chronic Rhinosinusitis (Diagnosis)
Interventions
Ibuprofen 400 mg, Acetaminophen 650 mg, OxyCODONE 5 Mg Oral Tablet
Drug
Lead sponsor
University of Washington
Other
Eligibility
Not listed
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Mar 22, 2023 · Synced Oct 4, 2026, 2:37 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 4, 2026, 2:37 AM EDT
Recruiting Phase 2Phase 3 Interventional Accepts healthy volunteers

Nonopioid Analgesia After Labral Surgery

NCT03825809
View directory record Official record
Conditions
Narcotic Use
Interventions
Celecoxib, Hydrocodone-Acetaminophen, Ketorolac, Gabapentin, Acetaminophen, Diazepam
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 31, 2019 · Synced Oct 4, 2026, 2:37 AM EDT
Terminated Phase 2 Interventional

Initial Pain Management in Pediatric Pancreatitis: Opioid vs. Non-Opioid

NCT04291599
View directory record Official record
Conditions
Acute Pancreatitis
Interventions
Ketorolac, Opioid
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Up to 21 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Oct 4, 2026, 2:37 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Acetaminophen for Fetal Tachycardia: a Randomized Pilot Trial

NCT00377832
View directory record Official record
Conditions
Fever, Heart Rate, Fetal (FHR)
Interventions
Acetaminophen 975 mg
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Flushing, New York
Source: ClinicalTrials.gov public record
Updated Sep 16, 2013 · Synced Oct 4, 2026, 2:37 AM EDT
Completed Phase 4 Interventional Results available

The Efficacy of Intravenous Acetaminophen During Perioperative Neurosurgery Period

NCT01739699
View directory record Official record
Conditions
Craniotomy, Brain Surgery
Interventions
Acetaminophen, Placebo
Drug
Lead sponsor
Endeavor Health
Other
Eligibility
18 Years to 90 Years
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Oct 4, 2026, 2:37 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does IV Acetaminophen Reduce Opioid Requirement in Pediatric Patients With Acute Sickle Cell Crises?

NCT03541980
View directory record Official record
Conditions
Sickle Cell Anemia Crisis
Interventions
Acetaminophen, Normal saline
Drug
Lead sponsor
Newark Beth Israel Medical Center
Other
Eligibility
4 Years to 16 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Newark, New York
Source: ClinicalTrials.gov public record
Updated Apr 2, 2021 · Synced Oct 4, 2026, 2:37 AM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers

Pain Management Following Sinus Surgery

NCT03822962
View directory record Official record
Conditions
Nasal Sinus; Inflammation, Opioid Abuse, Pain, Postoperative
Interventions
Ibuprofen 600Mg Tablet, Standard Regimen | Tylenol
Drug · Other
Lead sponsor
University of Nebraska
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
2
States / cities
Omaha, Nebraska • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Oct 4, 2026, 2:37 AM EDT
Active, not recruiting Phase 1 Interventional

Multi-virus CTLs Expressing CD19 Chimeric Receptors, CD19 Positive Malignancies Post SCT, MULTIPRAT

NCT00840853
View directory record Official record
Conditions
Acute Lymphoblastic Leukemia (ALL), Chronic Lymphocytic Leukemia (CLL), Non Hodgkin's Lymphoma
Interventions
CD19CAR/virus specific T cells, Benadryl and Tylenol
Genetic · Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Not listed
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2031
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 4, 2026, 2:37 AM EDT
Completed Phase 4 Interventional Results available

The Effect of NSAID Use in the Acute Phase of Skeletally Immature Bone Healing: A Prospective Study

NCT02076321
View directory record Official record
Conditions
Fractures
Interventions
Acetaminophen, Ibuprofen
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
Up to 16 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 5, 2019 · Synced Oct 4, 2026, 2:37 AM EDT