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ClinicalTrials.gov public records Last synced Oct 13, 2026, 6:38 PM EDT

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Showing 217–240 of 240 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Acetaminophen (Tylenol extra strength) Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Race/Ethnicity and Genes on Acetaminophen Pharmacokinetics

NCT00768716
View directory record Official record
Conditions
Pain, Fever, Hepatotoxicity
Interventions
Acetaminophen
Drug
Lead sponsor
Tufts University
Other
Eligibility
18 Years to 64 Years
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 23, 2019 · Synced Oct 13, 2026, 6:38 PM EDT
Suspended Phase 2 Interventional

Pain After Strabismus Surgery

NCT06689943
View directory record Official record
Conditions
Strabismus
Interventions
Tylenol
Drug
Lead sponsor
Ann & Robert H Lurie Children's Hospital of Chicago
Other
Eligibility
4 Years to 12 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 30, 2026 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 4 Interventional Results available

ICE-T Pain Regimen for Total Laparoscopic Hysterectomy

NCT03987022
View directory record Official record
Conditions
Opioid Substitution Treatment
Interventions
Ketorolac, Opioids, Ice Packs, Tylenol, Motrin, Dilaudid Injectable Product, Percocet 5Mg-325Mg Tablet
Drug · Other
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
18 Years to 80 Years · Female only
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 24, 2025 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Honey Used as Adjunct Therapy to Tylenol for Post-Op Tonsillectomy Patients

NCT03931395
View directory record Official record
Conditions
Tonsillectomy
Interventions
Honey, Standard of Care
Dietary Supplement · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
2 Years to 17 Years
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 1, 2021 · Synced Oct 13, 2026, 6:38 PM EDT
Not listed Phase 3 Interventional

Assessment of Postop Hypospadias Pain

NCT04423107
View directory record Official record
Conditions
Hypospadias
Interventions
Acetaminophen, Ibuprofen, Acetaminophen, Ibuprofen, Oxycodone
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
6 Months to 23 Months · Male only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jul 31, 2020 · Synced Oct 13, 2026, 6:38 PM EDT
Not listed Phase 4 Interventional

Evaluating the Use of Prednisone to Decrease Pegylated Interferon Beta-1a Side Effects

NCT03424733
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Plegridy, Prednisone, Tylenol Pill
Drug
Lead sponsor
Holy Name Medical Center, Inc.
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Teaneck, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 15, 2019 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Pre-emptive Analgesics in Orthodontic Treatment

NCT03523988
View directory record Official record
Conditions
NSAID, Pain Management
Interventions
Acetaminophen, Ibuprofen
Drug
Lead sponsor
University of Washington
Other
Eligibility
12 Years to 59 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 21, 2019 · Synced Oct 13, 2026, 6:38 PM EDT
Terminated Phase 2 Interventional Results available

Comparing Intrathecal Morphine and Intraoperative Lidocaine Infusion to Epidural Anesthesia With Postoperative PCA for Patients Undergoing Exploratory Laparotomy

NCT05017246
View directory record Official record
Conditions
Cancer Debulking, Enlarged Uterus, Fibroid Uterus, Adnexal Mass
Interventions
Bupivacaine, Morphine, Lidocaine
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 31, 2025 · Synced Oct 13, 2026, 6:38 PM EDT
Active, not recruiting Phase 1 Interventional Results available

Moxetumomab Pasudotox-tdfk (Lumoxiti(TM)) and Either Rituximab (Rituxan(R)) or Ruxience for Relapsed Hairy Cell Leukemia

NCT03805932
View directory record Official record
Conditions
Hairy Cell Leukemia
Interventions
Moxetumomab Pasudotox-tdfk, Rituximab, Ruxience, Dexamethasone, Acetaminophen, Diphenhydramine, Famotidine, Aspirin
Drug · Biological
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2029
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Oct 13, 2026, 6:38 PM EDT
Terminated Phase 4 Interventional Results available

Pain Control in Elderly Hip Fracture Patients: Is Intravenous Acetaminophen Superior to Oral Administration?

NCT02774148
View directory record Official record
Conditions
Hip Fracture
Interventions
IV Acetaminophen, PO Acetaminophen
Drug
Lead sponsor
Corewell Health West
Other
Eligibility
65 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
Grand Rapids, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 13, 2026, 6:38 PM 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 13, 2026, 6:38 PM EDT
Recruiting Phase 4 Interventional

NSAID Use for Treating Dysmenorrhea and Preventing Chronic Pelvic Pain (NSAID HEAL)

NCT06861920
View directory record Official record
Conditions
Dysmenorrhea, Chronic Pelvic Pain, Pelvic Pain
Interventions
Naproxen Sodium 550mg, Placebo, Extended Release Acetaminophen (650 mg)
Drug
Lead sponsor
Endeavor Health
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Evanston, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 7, 2025 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Acetaminophen Transfer Across the Placenta and the Assessment of Fetal Well-being

NCT01211912
View directory record Official record
Conditions
Fetal Testing, Transplacental Transfer of Acetaminophen
Interventions
Arm 1 (20 patients), Arm 2 (34 patients)
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 1, 2014 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study Comparing the Efficacy and Safety of Orally Administered Ibuprofen and Placebo in Delayed Onset Muscle Soreness

NCT02113566
View directory record Official record
Conditions
Delayed Onset Muscle Soreness
Interventions
Acetaminophen 1000mg
Drug
Lead sponsor
Jean Brown Research
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 2, 2015 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Not applicable Interventional

Acetaminophen for Oxidative Stress After Cardiopulmonary Bypass

NCT01228305
View directory record Official record
Conditions
Congenital Heart Disease, Cardiopulmonary Bypass
Interventions
Acetaminophen
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
1 Day to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 21, 2017 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 3 Interventional Results available

Pain Outcomes of Non-opioid vs. Opioid Analgesia for Kidney Stone Surgery.

NCT03584373
View directory record Official record
Conditions
Nephrolithiasis
Interventions
Ketorolac Oral Tablet [Toradol], Acetaminophen, Oxycodone Acetaminophen
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
119 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
2
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Dec 18, 2023 · Synced Oct 13, 2026, 6:38 PM EDT
Terminated Phase 1 Interventional Results available

Donor-Alloantigen-Reactive Regulatory T Cell (darTregs) in Liver Transplantation

NCT02188719
View directory record Official record
Conditions
Liver Transplantation
Interventions
Anti-Thymocyte Globulin - Rabbit, darTreg Infusion, Everolimus, Tacrolimus, Mycophenolate mofetil, Prednisone, Acetaminophen, Diphenhydramine, Anti-Infective Prophylaxis, Leukapheresis, Blood draws, Liver biopsies, Liver transplantation
Biological · Drug · Procedure
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
21 Years to 70 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
3
States / cities
San Francisco, California • Chicago, Illinois • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 22, 2020 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Emergence Agitation and Pain Scores in Pediatrics When Comparing Single-modal vs Multi-modal Analgesia for ENT Surgery

NCT03062488
View directory record Official record
Conditions
Emergence Agitation, Pain
Interventions
IV acetaminophen, Fentanyl, PO acetaminophen
Drug
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
24 Months to 7 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 18, 2020 · Synced Oct 13, 2026, 6:38 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers

Rectal Acetaminophen Use During Oocyte Retrievals to Reduce Post-Operative Opioid Utilization

NCT03732469
View directory record Official record
Conditions
Opioid Use
Interventions
Acetaminophen, Fentanyl, Propofol
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 56 Years · Female only
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jun 18, 2021 · Synced Oct 13, 2026, 6:38 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Comparative Bioavailability Study of Codeine Sulfate

NCT01010152
View directory record Official record
Conditions
Pain
Interventions
Codeine Sulfate
Drug
Lead sponsor
Roxane Laboratories
Industry
Eligibility
18 Years to 45 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Oct 13, 2026, 6:38 PM 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 13, 2026, 6:38 PM EDT
Completed Phase 2 Interventional Results available

Postoperative Ibuprofen and the Risk of Bleeding After Tonsillectomy With or Without Adenoidectomy

NCT01605903
View directory record Official record
Conditions
Tonsillectomy, Adenoidectomy
Interventions
Ibuprofen, Acetaminophen
Drug
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
2 Years to 18 Years
Enrollment
741 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
5
States / cities
San Diego, California • Boston, Massachusetts • San Antonio, Texas + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2018 · Synced Oct 13, 2026, 6:38 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 Sep 24, 2026 · Synced Oct 13, 2026, 6:38 PM EDT
Withdrawn Phase 3 Interventional

Multimodal Analgesia in Shoulder Arthroplasty

NCT03586934
View directory record Official record
Conditions
Shoulder Pain, Opioid Use
Interventions
Acetaminophen, Celecoxib 200mg, Celecoxib 400 mg, Ropivacaine, Ketorolac, Acetaminophen Injectable Product, Oxycodone, Tramadol, Morphine Injectable Solution, hydrocodone bitartrate and acetaminophen, Morphine, Oxycodone Hydrochloride, Meloxicam
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 28, 2021 · Synced Oct 13, 2026, 6:38 PM EDT