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Showing 1–24 of 938 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Acetaminophen/Paracetamol Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Aminotransferase Trends During Prolonged Acetaminophen Dosing

NCT00743093
View directory record Official record
Conditions
Drug Toxicity, Healthy
Interventions
acetaminophen, placebo
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years and older
Enrollment
398 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
2
States / cities
Aurora, Colorado • Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 17, 2013 · Synced Sep 3, 2026, 9:25 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Understanding Patient's Knowledge and Use of Acetaminophen

NCT00823758
View directory record Official record
Conditions
Liver Failure
Interventions
Focus Groups, Personal Interviews
Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
13 Years and older
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2020
U.S. locations
4
States / cities
Philadelphia, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Sep 3, 2026, 9:25 PM 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 12, 2018 · Synced Sep 3, 2026, 9:25 PM EDT
Enrolling by invitation Not applicable Interventional

Alternatives to Dental Opioid Prescribing After Tooth Extraction

NCT06275191
View directory record Official record
Conditions
Analgesics, Opioid, Acute Pain, Tooth Extraction, Adolescent, Acetaminophen, Ibuprofen
Interventions
Multicomponent intervention, Usual care
Behavioral · Other
Lead sponsor
Douglas Oyler
Other
Eligibility
12 Years to 25 Years
Enrollment
38,159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Sep 3, 2026, 9:25 PM EDT
Terminated Phase 3 Interventional Results available

Acetaminophen in aSAH to Inhibit Lipid Peroxidation and Cerebral Vasospasm

NCT00585559
View directory record Official record
Conditions
Aneurysmal Subarachnoid Hemorrhage, Cerebral Vasospasm
Interventions
Placebos for acetaminophen and N-acetylcysteine, APAP 1 gm every 6 hours and N-acetylcysteine placebo, NAC IV infusion at 0.5 gm hourly and APAP placebo, APAP 1 gm q6 hours, plus NAC IV infusion at 0.5 gm hourly, APAP 1.5 gm q6 hours, plus NAC IV infusion at 0.5 gm hourly
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
20 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2023
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 17, 2025 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Combination Immunosuppressive Therapy to Prevent Kidney Transplant Rejection in Adults

NCT00078559
View directory record Official record
Conditions
Kidney Transplantation, Kidney Disease
Interventions
Alemtuzumab, Sirolimus, Tacrolimus, Kidney transplant, Methylprednisolone (or equivalent), Acetaminophen, Diphenhydramine, Trimethoprim (TMP)/Sulfa (Bactrim, Septra), Valgancyclovir, Acyclovir, Pentamidine, Clotrimazole, Nystatin
Drug · Procedure
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jun 28, 2018 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 4 Interventional Results available

A Randomized Study of Three Medication Regimens for Acute Low Back Pain

NCT01587274
View directory record Official record
Conditions
Acute Low Back Pain
Interventions
Naproxen, Cyclobenzaprine, Oxycodone/ acetaminophen
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
21 Years to 64 Years
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 30, 2018 · Synced Sep 3, 2026, 9:25 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 3, 2026, 9:25 PM EDT
Completed Phase 4 Interventional Results available

Study of Alemtuzumab Versus Anti-thymocyte Globulin to Help Prevent Rejection in Kidney and Pancreas Transplantation

NCT00331162
View directory record Official record
Conditions
Graft Rejection
Interventions
Alemtuzumab, Anti-Thymocyte Globulin
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 65 Years
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 5, 2018 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy of Intravenous Acetaminophen (IV APAP) in Adult Inpatients

NCT00598559
View directory record Official record
Conditions
Acute Pain, Fever
Interventions
IV Acetaminophen
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 85 Years
Enrollment
213 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
14
States / cities
Arcadia, California • Glendale, California • Laguna Hills, California + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2016 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Not applicable Interventional

Use Ear Acupuncture as Treatment for Low Back Pain During Pregnancy

NCT00571480
View directory record Official record
Conditions
Pregnancy Related Low Back Pain
Interventions
acupuncture, Sham acupuncture, standard of care
Other
Lead sponsor
Yale University
Other
Eligibility
13 Years to 46 Years · Female only
Enrollment
159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 20, 2009 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetic Study Investigating the Extent of Paracetamol Absorption From a New Formulation of Paracetamol Compared With Panadol®

NCT01540734
View directory record Official record
Conditions
Healthy Subjects
Interventions
Marketed paracetamol, Experimental paracetamol formulation
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 55 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Novel Multimodal Pain Control Protocol for Minimally Invasive Gynecologic Surgery

NCT04710277
View directory record Official record
Conditions
Postoperative Pain, Narcotic Use, Cryotherapy Effect
Interventions
Opioid-sparing multimodal pain management, Usual care
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years and older · Female only
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 11, 2023 · Synced Sep 3, 2026, 9:25 PM EDT
Terminated Phase 3 Interventional

Perioperative Analgesia on Postoperative Opioid Usage and Pain Control in H&N Cancer Surgery

NCT04176419
View directory record Official record
Conditions
Postoperative Pain Control, Opioid Consumption
Interventions
Ketamine, Placebo Ketamine, Lidocaine, Placebo Lidocaine, Acetaminophen, Placebo Acetaminophen, Gabapentin, Placebo Gabapentin, Celecoxib, Placebo Celecoxib
Drug
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 11, 2024 · Synced Sep 3, 2026, 9:25 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Post-tonsillectomy Pain Control in Adults

NCT02358850
View directory record Official record
Conditions
Pain, Postoperative, Postoperative Nausea and Vomiting, Postoperative Hemorrhage, Body Weight Changes
Interventions
Norco (Hydrocodone and Acetaminophen), Percocet (Oxycodone and Acetaminophen), Dilaudid (hydromorphone), Tylenol (Acetaminophen)
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 12, 2023 · Synced Sep 3, 2026, 9:25 PM EDT
Withdrawn No phase listed Observational

Factors Affecting Perioperative Outcomes

NCT01530191
View directory record Official record
Conditions
Pelvic Organ Prolapse
Interventions
Not listed
Lead sponsor
University of Oklahoma
Other
Eligibility
21 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Oct 15, 2013 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Treg Therapy in Subclinical Inflammation in Kidney Transplantation

NCT02711826
View directory record Official record
Conditions
Kidney Transplant, Adult Living Donor Kidney Transplant Recipients, Renal Transplant, Living Kidney Donor
Interventions
Polyclonal Regulatory T Cells, Everolimus, Tacrolimus, Mycophenolate mofetil, Mycophenolic acid, Acetaminophen, Diphenhydramine, Biopsy, Kidney, Blood Draw, Leukapheresis, IS regimen conversion
Biological · Drug · Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
6
States / cities
Birmingham, Alabama • San Francisco, California • Aurora, Colorado + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Sep 3, 2026, 9:25 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

A Comparison of Plasma Concentrations of Hydrocodone and Acetaminophen After Administration of a New and a Marketed Tablet Formulation Under Fasted and Fed Conditions in Healthy Adults

NCT03137017
View directory record Official record
Conditions
Opioid-Related Disorders, Pain, Acute, Pain, Postoperative
Interventions
Norco 5Mg-325Mg Tablet, GRT7014 - Abuse Deterrent Tablet
Drug
Lead sponsor
Grünenthal GmbH
Industry
Eligibility
18 Years to 55 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 20, 2017 · Synced Sep 3, 2026, 9:25 PM EDT
Not listed Phase 3 Interventional

ACL-R Opioid Sparing Study

NCT06561035
View directory record Official record
Conditions
Anterior Cruciate Ligament Injuries
Interventions
Opiate Sparing, Opiate Based
Drug
Lead sponsor
Campbell Clinic
Other
Eligibility
14 Years to 85 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 18, 2024 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 4 Interventional Results available

Acetaminophen or Fluvastatin Compared to Placebo on the Transient Post-Dose Symptoms (PDS) Following an Intravenous (i.v.) Infusion of a Single Dose of Zoledronic Acid 5mg, in Post-menopausal Women With Low Bone Mass

NCT00489424
View directory record Official record
Conditions
Osteoporosis
Interventions
Placebo, Acetaminophen, Fluvastatin
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
45 Years to 79 Years · Female only
Enrollment
793 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007
U.S. locations
1
States / cities
Http://www.osteoporosisclinicalresearch.com, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 17, 2011 · Synced Sep 3, 2026, 9:25 PM EDT
Completed Phase 3 Interventional Results available

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

NCT00315445
View directory record Official record
Conditions
Back Pain
Interventions
Buprenorphine transdermal patch, Placebo oxycodone/acetaminophen tablets, OXY/APAP, Placebo transdermal patch (TDS)
Drug
Lead sponsor
Purdue Pharma LP
Industry
Eligibility
18 Years and older
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 1998
U.S. locations
12
States / cities
Huntsville, Alabama • Phoenix, Arizona • Gainesville, Florida + 7 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2012 · Synced Sep 3, 2026, 9:25 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

FDM for Subacute and Chronic Extremity Pain in the ED

NCT04555239
View directory record Official record
Conditions
Myofascial Pain, Chronic Pain, Extremities Disorders, Osteopathic Manipulation
Interventions
Fascial Distortion Model (FDM), Standard Care
Procedure · Other
Lead sponsor
Carilion Clinic
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
4
States / cities
Christiansburg, Virginia • Lexington, Virginia • Roanoke, Virginia + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Sep 3, 2026, 9:25 PM EDT
Withdrawn Phase 4 Interventional

The Effect of NSAIDs After a Rotator Cuff Repair Surgery.

NCT02153177
View directory record Official record
Conditions
Rotator Cuff Tear
Interventions
Rotator cuff repair, Ibuprofen, Hydrocodone/Acetaminophen, Omeprazole, Hydrocodone/Acetaminophen
Procedure · Drug
Lead sponsor
University of Chicago
Other
Eligibility
45 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 22, 2023 · Synced Sep 3, 2026, 9:25 PM 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 6, 2018 · Synced Sep 3, 2026, 9:25 PM EDT