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Showing 1–24 of 90 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Acetaminophen 1000mg Clear all
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 4, 2025 · Synced Sep 2, 2026, 1:42 PM EDT
Terminated Phase 4 Interventional Results available

Multi-dose Acetaminophen for Patients Undergoing General Anesthesia

NCT02832687
View directory record Official record
Conditions
Recovery Following Cholecystectomy
Interventions
Acetaminophen, normal saline
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
3
States / cities
Newark, New Jersey • Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Jun 7, 2026 · Synced Sep 2, 2026, 1:42 PM 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 21, 2026 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 2 Interventional

Preeclampsia And Nonsteroidal Drugs for Analgesia: a Randomized Non Inferiority Trial

NCT03978767
View directory record Official record
Conditions
Preeclampsia Severe, Preeclampsia Postpartum
Interventions
Ibuprofen 600 mg, Ketorolac, Acetaminophen, Oxycodone
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Female only
Enrollment
287 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Sep 2, 2026, 1:42 PM EDT
Completed No phase listed Observational

Serratus Anterior Plane Block for Improving Pain and Respiratory Function in Patients With Multiple Rib Fractures

NCT04311827
View directory record Official record
Conditions
Rib Fracture Multiple
Interventions
Serratus Anterior Plane Block
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Aug 24, 2022 · Synced Sep 2, 2026, 1:42 PM 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 23, 2023 · Synced Sep 2, 2026, 1:42 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Optimizing Pain Control in Transurethral Resection of the Prostate

NCT04102566
View directory record Official record
Conditions
Pain, BPH With Urinary Obstruction, BPH With Urinary Obstruction With Other Lower Urinary Tract Symptoms
Interventions
Ibuprofen 600 mg, Education
Drug · Behavioral
Lead sponsor
Benaroya Research Institute
Other
Eligibility
18 Years and older · Male only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Sep 2, 2026, 1:42 PM EDT
Withdrawn Phase 4 Interventional

Outcome of IV Acetaminophen Use in Laparoscopic Cholecystectomies in Patients at Risk of OSA

NCT02056678
View directory record Official record
Conditions
Cholecystitis, Cholelithiasis, Obstructive Sleep Apnea
Interventions
acetaminophen, IV preparation
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 2, 2016 · Synced Sep 2, 2026, 1:42 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 6, 2025 · Synced Sep 2, 2026, 1:42 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 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of Oral vs. Intravenous Acetaminophen

NCT02643394
View directory record Official record
Conditions
Postoperative Pain
Interventions
Oral Acetaminophen, Intravenous acetaminophen
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Apr 20, 2020 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Results available

IV vs. Oral Acetaminophen as a Component of Multimodal Analgesia After Total Hip Arthroplasty

NCT03020966
View directory record Official record
Conditions
Pain, Postoperative, Opioid Use
Interventions
Acetaminophen
Drug
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
18 Years to 90 Years
Enrollment
154 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 Aug 9, 2021 · Synced Sep 2, 2026, 1:42 PM EDT
Recruiting Phase 4 Interventional

NonNarcotic Pain Control in Percutaneous Needle Tenotomy of Elbow

NCT06373978
View directory record Official record
Conditions
Elbow Pain, Chronic Pain
Interventions
Diclofenac, Tramadol, Acetaminophen
Drug · Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
Coral Springs, Florida • Avon, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 2, 2026, 1:42 PM 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 11, 2026 · Synced Sep 2, 2026, 1:42 PM EDT
Terminated Phase 4 Interventional

Effect of Perioperative Acetaminophen Dosing on Patients Undergoing Surgical Treatment of Basilar Thumb Arthritis

NCT05556356
View directory record Official record
Conditions
Carpometacarpal Osteoarthritis
Interventions
Acetaminophen, Placebo: Multivitamin
Drug · Other
Lead sponsor
Indiana Hand to Shoulder Center
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 7, 2024 · Synced Sep 2, 2026, 1:42 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 Aug 15, 2022 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 2 Interventional Results available

Acetaminophen Versus IV Hydromorphone for Pain in the Elderly in the ED

NCT03521102
View directory record Official record
Conditions
Acute Pain
Interventions
Acetaminophen 1000mg IV, Hydromorphone 0.5 mg IV
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
65 Years and older
Enrollment
162 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Sep 2, 2026, 1:42 PM EDT
Recruiting Phase 4 Interventional

Comparing Analgesic Regimen Effectiveness and Safety for Surgery for Kids Trial

NCT06671002
View directory record Official record
Conditions
Surgery, Pain, Post Operative
Interventions
NSAID, Opioid, Acetaminophen, Ibuprofen
Drug
Lead sponsor
University of Michigan
Other
Eligibility
12 Years to 20 Years
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
4
States / cities
Los Angeles, California • Palo Alto, California • Ann Arbor, Michigan + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Preemptive Analgesia With Celecoxib for Acute Dental Pain Management

NCT04790812
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Celecoxib, Acetaminophen, Placebo
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 45 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2024 · Synced Sep 2, 2026, 1:42 PM EDT
Terminated Phase 4 Interventional Results available

Effect of NSAID Use on Pain and Opioid Consumption Following Distal Radius Fracture

NCT03749616
View directory record Official record
Conditions
Distal Radius Fracture
Interventions
Ibuprofen, Acetaminophen
Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 4, 2024 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Determine the Clinical Advantage of IV vs PO Acetaminophen

NCT03558555
View directory record Official record
Conditions
Inguinal Hernia
Interventions
Acetaminophen IV Soln, Oral Acetaminophen, Placebo Pills, Saline
Drug
Lead sponsor
Yan Lai
Other
Eligibility
18 Years to 75 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 9, 2020 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Results available

RCT (Randomized Controlled Trial) of IV Acetaminophen for Post Cesarean Pain Relief

NCT02046382
View directory record Official record
Conditions
Cesarean Section, Pain, Postoperative
Interventions
IV Acetaminophen, Placebo
Drug
Lead sponsor
TriHealth Inc.
Other
Eligibility
18 Years and older · Female only
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 15, 2018 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 3 Interventional Results available

Ibuprofen With or Without Acetaminophen for Low Back Pain

NCT03554018
View directory record Official record
Conditions
Low Back Pain
Interventions
Acetaminophen, Ibuprofen 600 mg, Educational intervention, Placebo oral capsule
Drug · Behavioral
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 69 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Feb 27, 2024 · Synced Sep 2, 2026, 1:42 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

IV Acetaminophen for Postoperative Pain Analgesia After Laparoscopic Hysterectomy

NCT02400580
View directory record Official record
Conditions
Pain
Interventions
IV acetaminophen, placebo
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 75 Years · Female only
Enrollment
183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 12, 2018 · Synced Sep 2, 2026, 1:42 PM EDT