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ClinicalTrials.gov public records Last synced Oct 21, 2026, 5:31 PM EDT

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Showing 25–48 of 979 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: APAP Clear all
Terminated Phase 3 Interventional Accepts healthy volunteers Results available

Clinical Study to Evaluate Efficacy of New Paracetamol Formulation Compared to Ibuprofen in Headache

NCT01842633
View directory record Official record
Conditions
Pain
Interventions
Paracetamol and Caffeine, Ibuprofen, Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
365 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Waltham, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 1, 2017 · Synced Oct 21, 2026, 5:31 PM EDT
Withdrawn Early Phase 1 Interventional

Transition From Acute to Chronic Opioid Use and Chronic Pain

NCT07211399
View directory record Official record
Conditions
Opioid Use Disorder
Interventions
Opioid-free anesthesia, Opioid-based anesthesia
Drug
Lead sponsor
Jacques E. Chelly
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 2 Interventional Results available

PECS Block vs. Multimodal Analgesia for Prevention of Persistent Postoperative Pain in Breast Surgery

NCT03084536
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Cancer of Breast
Interventions
Bupivacaine, Gabapentin, Celecoxib, Acetaminophen, Midazolam, Fentanyl
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
134 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 24, 2024 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Acute Headache Treatment in Pregnancy: Occipital Nerve Block vs PO Acetaminophen With Caffeine

NCT03951649
View directory record Official record
Conditions
Headache, Pregnancy Related, Occipital Nerve Block
Interventions
Occipital Nerve Block
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
16 Years to 60 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Dec 20, 2023 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 3 Interventional Results available

Aspirin for Exercise in Multiple Sclerosis (ASPIRE)

NCT03824938
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Aspirin 650mg Oral Capsule, Acetaminophen Tablet 650mg, Placebo
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 27, 2023 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 3 Interventional

A Phase 3 Study of F14 for Management of Pain Following Total Knee Replacement

NCT05603832
View directory record Official record
Conditions
Post Operative Pain
Interventions
F14, 0.25 % Bupivacaine HCl, Acetaminophen, Methocarbamol
Drug
Lead sponsor
Arthritis Innovation Corporation
Industry
Eligibility
45 Years to 80 Years
Enrollment
151 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
7
States / cities
Little Rock, Arkansas • Tamarac, Florida • Tulsa, Oklahoma + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect on Acetaminophen Metabolism by Liquid Formulations

NCT01246713
View directory record Official record
Conditions
Acetaminophen Metabolism, Acetaminophen Poisoning, Drug Metabolism by Excipients
Interventions
Acetaminophen liquid formulation, Acetaminophen solid formulation
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 40 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 8, 2017 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional

Non-opioid Based Pain Control After Thyroidectomy

NCT03988075
View directory record Official record
Conditions
Pain, Thyroidectomy
Interventions
Acetaminophen and hydrocodone based pain control, Acetaminophen and ibuprofen based pain control
Other
Lead sponsor
Medstar Health Research Institute
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated May 12, 2020 · Synced Oct 21, 2026, 5:31 PM EDT
Suspended Phase 1 Interventional

Trazodone Dose Tolerance and APAP Adherence

NCT02945644
View directory record Official record
Conditions
Sleep Apnea, Obstructive
Interventions
Trazodone, Placebo
Drug
Lead sponsor
Louis Stokes VA Medical Center
Federal
Eligibility
18 Years and older
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Oct 21, 2026, 5:31 PM EDT
Terminated Phase 4 Interventional Results available

NSAIDs vs Opioids for Post-op Pain in Supracondylar Humerus Fractures

NCT04905563
View directory record Official record
Conditions
Supracondylar Humerus Fracture
Interventions
Acetaminophen-Hydrocodone, Acetaminophen and Ibuprofen
Drug
Lead sponsor
Le Bonheur Children's Hospital
Other
Eligibility
4 Years to 13 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 8, 2024 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 4 Interventional Results available

Hydrocodone Compared to Acetaminophen and Ibuprofen for Post-nail Procedure Analgesia

NCT05544734
View directory record Official record
Conditions
Nail Diseases, Nail Abnormality
Interventions
Hydrocodone 5Mg/Acetaminophen 325Mg Tab, Acetaminophen 1000mg, Ibuprofen 400 mg
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 95 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 21, 2026, 5:31 PM EDT
Not yet recruiting Not applicable Interventional

KPAP Adherence Crossover Study

NCT06413134
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
KPAP, APAP
Device
Lead sponsor
SleepRes Inc.
Industry
Eligibility
20 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Murfreesboro, Tennessee
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Terminated Phase 2 Interventional Results available

Elotuzumab in Immunoglobulin G4-Related Disease (IgG4-RD)

NCT04918147
View directory record Official record
Conditions
IgG4 Related Disease, IgG4-RD
Interventions
elotuzumab, placebo for elotuzumab, methylprednisolone, diphenhydramine, acetaminophen, famotidine, prednisone
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 70 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
3
States / cities
Atlanta, Georgia • Boston, Massachusetts • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Pharmacokinetic Study to Compare Sustained Release and Standard Paracetamol Formulations.

NCT01551797
View directory record Official record
Conditions
Pain
Interventions
Paracetamol 500 mg, Paracetamol 1000 mg, Paracetamol 750 mg
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 50 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Dec 10, 2012 · Synced Oct 21, 2026, 5:31 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 28, 2024 · Synced Oct 21, 2026, 5:31 PM EDT
Active, not recruiting Not applicable Interventional

CYP2D6 Genotype-guided Management of Opioid Analgesics in Patients Undergoing Elective Ventral Hernia Repairs

NCT06565546
View directory record Official record
Conditions
Ventral Hernia
Interventions
Opioid pain medication prescribed based on CYP2D6 genotype testing PLUS Acetaminophen and Gabapentin, Acetaminophen and Gabapentin: standard postoperative pain medications
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 3 Interventional Results available

Transversus Abdominis Plane Block in Microsurgical Breast Recon w/Abdominal Free Flap in Breast CA

NCT02601027
View directory record Official record
Conditions
Breast - Female
Interventions
Transversus Abdominis Plane (TAP) block, Nimbus Infusion Pump IV Administration, Bupivacaine infusion, Acetominophen, Hydromorphone, Oxycodone, Ondansetron
Procedure · Device · Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 23, 2021 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 2 Interventional

Ibuprofen Plus Acetaminophen Versus Oxycodone Alone After Hand Surgery

NCT03111186
View directory record Official record
Conditions
Carpal Tunnel Syndrome, Dupuytren Contracture, Trigger Digit, Ganglion Cysts, De Quervain Disease
Interventions
Oxycodone Hcl 5Mg, Ibuprofen 400 mg, Acetaminophen 650 mg
Drug
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Oct 21, 2026, 5:31 PM EDT
Enrolling by invitation Phase 4 Interventional

Pain Management Study

NCT05231460
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Active Comparator: narcotic regimen with TAP block, Active Comparator: narcotic regimen with no TAP block, non-narcotic regimen with TAP block, non-narcotic regimen with no TAP block
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years and older
Enrollment
244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 24, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of Ketamine for Improvement in Postoperative Pain Control After Spinal Fusion for Idiopathic Scoliosis

NCT02651324
View directory record Official record
Conditions
Idiopathic Scoliosis, Post-operative Pain
Interventions
Ketamine, Placebo
Drug · Other
Lead sponsor
Albany Medical College
Other
Eligibility
Not listed
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
Albany, New York
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Not applicable Interventional

Pre-Emptive Analgesia in Ano-Rectal Surgery

NCT02402543
View directory record Official record
Conditions
Hemorrhoids, Fissure in Ano, Rectal Fistula, Anal Condyloma
Interventions
Gabapentin, Ketamine, Acetaminophen, Dexamethasone, Placebo
Drug
Lead sponsor
University of Vermont
Other
Eligibility
18 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
2
States / cities
Burlington, Vermont • Colchester, Vermont
Source: ClinicalTrials.gov public record
Updated Jan 16, 2018 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 4 Interventional Results available

A Prospective Study to Investigate Safety and Tolerability of Shorter Infusion of Fabrazyme

NCT06019728
View directory record Official record
Conditions
Fabry's Disease
Interventions
AGALSIDASE BETA (GZ419828), Acetaminophen, Diphenhydramine, Dexamethasone, Montelukast, Loratadine, Cetirizine, Fexofenadine
Drug
Lead sponsor
Sanofi
Industry
Eligibility
2 Years to 65 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
5
States / cities
Santa Monica, California • Atlanta, Georgia • Grand Rapids, Michigan + 2 more
Source: ClinicalTrials.gov public record
Updated Oct 21, 2025 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 2 Interventional Results available

Hydrocodone/Acetaminophen for Acute Pain Following Bunionectomy

NCT01038609
View directory record Official record
Conditions
Pain
Interventions
Hydrocodone/Acetaminophen Extended Release, Acetaminophen, Morphine Extended Release, Placebo
Drug
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
18 Years to 75 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
4
States / cities
Peoria, Arizona • Austin, Texas • San Marcos, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2014 · Synced Oct 21, 2026, 5:31 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study of Acetaminophen/Naproxen Sodium Fixed Combination Tablets in Adolescents 12 to <17 Years of Age With Pain

NCT05844995
View directory record Official record
Conditions
Orthodontic Pain
Interventions
Acetaminophen/Naproxen Sodium
Drug
Lead sponsor
Johnson & Johnson Consumer Inc. (J&JCI)
Industry
Eligibility
12 Years to 16 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Mar 15, 2024 · Synced Oct 21, 2026, 5:31 PM EDT