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ClinicalTrials.gov public records Last synced Oct 22, 2026, 1:02 AM EDT

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Showing 97–120 of 979 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: APAP Clear all
Terminated Phase 3 Interventional Accepts healthy volunteers

Efficacy of a Single Dose of Aspirin vs. Acetaminophen in Tension Type Headache

NCT01552798
View directory record Official record
Conditions
Headache
Interventions
Acetylsalicylic acid (Aspirin, BAY1019036), Acetaminophen, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
18 Years to 65 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Kalamazoo, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 19, 2018 · Synced Oct 22, 2026, 1:02 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Testosterone Treatment on Drug Metabolism and Transport

NCT05116293
View directory record Official record
Conditions
Transgender Persons
Interventions
Midazolam oral solution, Digoxin Oral Tablet, Acetaminophen Oral Tablet
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 60 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 22, 2026, 1:02 AM 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 12, 2026 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 3 Interventional

A Study of Extended-Release Hydrocodone/Acetaminophen (Vicodin CR®) in Subjects With Acute Pain Following Bunionectomy

NCT00402792
View directory record Official record
Conditions
Pain
Interventions
Hydrocodone/Acetaminophen Extended Release, Placebo
Drug
Lead sponsor
Abbott
Industry
Eligibility
18 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
5
States / cities
Austin, Texas • Houston, Texas • San Antonio, Texas + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 25, 2011 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

4-methylpyrazole and Acetaminophen Metabolism

NCT03878693
View directory record Official record
Conditions
Healthy Adult Volunteers
Interventions
Fomepizole, APAP
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Oct 22, 2026, 1:02 AM EDT
Terminated Not applicable Interventional Results available

Liposomal Bupivacaine in Implant Based Breast Reconstruction

NCT02659501
View directory record Official record
Conditions
Breast Cancer, Postoperative Pain
Interventions
Liposomal bupivacaine, Bupivacaine with epinephrine, Morphine sulfate, Hydrocodone/acetaminophen, Diazepam
Drug
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years to 99 Years · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2021 · Synced Oct 22, 2026, 1:02 AM EDT
Recruiting Phase 4 Interventional

Meloxicam in Mohs Micrographic Surgery

NCT07200544
View directory record Official record
Conditions
Postoperative Pain, Acute, Skin Cancer
Interventions
Meloxicam 7.5 mg, Meloxicam 15 mg, Acetaminophen 500mg
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 110 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 3 Interventional Results available

IV Acetaminophen as Adjuvant Analgesic to Hydromorphone - Emergency Department Patients

NCT03553498
View directory record Official record
Conditions
Acute Pain
Interventions
IV acetaminophen, IV placebo, hydromorphone
Drug
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
21 Years to 64 Years
Enrollment
162 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 Mar 2, 2022 · Synced Oct 22, 2026, 1:02 AM EDT
Terminated Phase 2 Interventional

CT-2584 in Treating Patients With Metastatic Prostate Cancer That Has Not Responded to Previous Therapy

NCT00004026
View directory record Official record
Conditions
Prostate Cancer
Interventions
CT-2584, chemotherapy
Drug
Lead sponsor
CTI BioPharma
Industry
Eligibility
18 Years to 120 Years · Male only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2005
U.S. locations
7
States / cities
Los Angeles, California • San Francisco, California • New Orleans, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 19, 2020 · Synced Oct 22, 2026, 1:02 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 22, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Study of Long-Acting Acetaminophen in Postoperative Dental Pain

NCT01960114
View directory record Official record
Conditions
Dental Pain
Interventions
Acetaminophen ER, Placebo
Drug
Lead sponsor
McNeil Consumer Healthcare Division of McNEIL-PPC, Inc.
Industry
Eligibility
17 Years to 45 Years
Enrollment
403 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jul 10, 2015 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Not applicable Interventional

Conditioned Open-label Placebo (COLP) for Peri-operative Pain Management in Patients With Head and Neck Cancer

NCT04973748
View directory record Official record
Conditions
Postoperative Pain, Opioid Use
Interventions
Conditioned open-label placebo (COLP), Surveys about pain, opioid use and depression symptoms
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 23, 2024 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 4 Interventional

Prevention of Post-Mastectomy Breast Pain Using Ambulatory Continuous Paravertebral Blocks

NCT01231204
View directory record Official record
Conditions
Paravertebral Catheter Insertion, Mastectomy, Breast Cancer
Interventions
Placebo (normal saline) Continuous Infusion, Ropivicaine 0.4% Continuous Infusion
Procedure
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Apr 11, 2016 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 3 Interventional

Randomized Study of Acetylcysteine in Patients With Acute Liver Failure Not Caused by Acetaminophen

NCT00004467
View directory record Official record
Conditions
Acute Liver Failure
Interventions
N-acetylcysteine (NAC), Placebo
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 70 Years
Enrollment
173 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2006
U.S. locations
25
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Los Angeles, California + 19 more
Source: ClinicalTrials.gov public record
Updated Oct 13, 2017 · Synced Oct 22, 2026, 1:02 AM EDT
Recruiting Phase 3 Interventional

The SCOPE Trial: Sleep, Cognition, and Pain Bundle vs. ERAS-cardiac for Postoperative Delirium

NCT06721819
View directory record Official record
Conditions
Delirium, Postoperative, Delirium in Old Age
Interventions
Sleep Hygiene, Brain Game, and IV Acetaminophen Intervention, Control
Combination Product · Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
60 Years and older
Enrollment
406 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
3
States / cities
Boston, Massachusetts • New York, New York • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Gastrointestinal Safety Evaluation of Two Over the Counter Analgesics

NCT01822665
View directory record Official record
Conditions
Gastrointestinal Mucosal Damage
Interventions
Ibuprofen, Paracetamol, Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 60 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 31, 2014 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Randomized Trial for Mixed Acute Rejection

NCT00771875
View directory record Official record
Conditions
Graft Rejection
Interventions
Rabbit Antithymocyte Globulin (RATG), Rituximab, Bortezomib, Acetaminophen, Antihistamine, Methylprednisolone
Drug
Lead sponsor
University of Cincinnati
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
2
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 27, 2016 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 4 Interventional Results available

Pre vs Post Block in Total Knee Arthroplasty (TKA)

NCT05974501
View directory record Official record
Conditions
Knee Osteoarthritis, Arthroplasty Complications, Postoperative Pain
Interventions
Dexamethasone, Acetaminophen, Lyrica, Celebrex, Meloxicam, Oxycodone, Ropivacaine
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 12, 2025 · Synced Oct 22, 2026, 1:02 AM EDT
Active, not recruiting Phase 3 Interventional Accepts healthy volunteers

Isatuximab in Combination With Lenalidomide and Dexamethasone in High-risk Smoldering Multiple Myeloma

NCT04270409
View directory record Official record
Conditions
Plasma Cell Myeloma
Interventions
Isatuximab SAR650984, Lenalidomide, Dexamethasone, Montelukast or equivalent, Acetaminophen, Diphenhydramine or equivalent, Methylprednisolone or equivalent
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
337 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2033
U.S. locations
9
States / cities
Los Angeles, California • Denver, Colorado • Jacksonville, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Dec 12, 2025 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Not applicable Interventional Results available

Efficacy of Oral Versus Intravenous Acetaminophen for Primary Pediatric Cleft Palate Repair

NCT01500109
View directory record Official record
Conditions
Cleft Palate
Interventions
Oral acetaminophen, Ofirmev®, Opioid only
Drug
Lead sponsor
Loma Linda University
Other
Eligibility
5 Months to 5 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated Jun 9, 2021 · Synced Oct 22, 2026, 1:02 AM EDT
Terminated Phase 3 Interventional Results available

Perioperative Analgesia Using Gabapentin in Head and Neck Cancer Surgery

NCT03682367
View directory record Official record
Conditions
Cancer of Head and Neck, Narcotic Use
Interventions
Gabapentin, Placebo - Concentrate
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 9, 2021 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Phase 2 Interventional Results available

Rituximab and Belimumab for Lupus Nephritis

NCT02260934
View directory record Official record
Conditions
Lupus Nephritis
Interventions
Rituximab, Cyclophosphamide, Prednisone, Methylprednisolone, Diphenhydramine, Acetaminophen, Belimumab
Biological · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
15
States / cities
Birmingham, Alabama • Los Angeles, California • San Francisco, California + 10 more
Source: ClinicalTrials.gov public record
Updated Dec 1, 2020 · Synced Oct 22, 2026, 1:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Intravenous Versus Oral Acetaminophen for Postoperative Pain Control After Cesarean Delivery

NCT02487303
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Acetaminophen Intravenous, Acetaminophen Oral
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years and older · Female only
Enrollment
148 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Dec 5, 2018 · Synced Oct 22, 2026, 1:02 AM EDT
Not yet recruiting Phase 4 Interventional

Suzetrigine in Tonsillectomy for Opioid-sparing Pain Management

NCT07821931
View directory record Official record
Conditions
Tonsillectomy, Pharyngoplasty, Suzetrigine, Opioid, Postoperative Pain, Acute Pain
Interventions
Suzetrigine, Acetaminophen, oxycodone
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 22, 2026, 1:02 AM EDT