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Showing 1–24 of 254 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: APAP and Placebo Clear all
Completed Phase 4 Interventional Results available

Effect of Perioperative Gabapentin on Postoperative Opioid Requirements

NCT05494385
View directory record Official record
Conditions
Postoperative Pain
Interventions
Preoperative Gabapentin/Postoperative Placebo, Preoperative Gabapentin/Postoperative Gabapentin
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older · Female only
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 22, 2024 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Reduction in Pain Intensity Following IV or Oral Pain-relieving Products

NCT02678416
View directory record Official record
Conditions
Pain
Interventions
IV Acetaminophen (Treatment A), Oral Acetaminophen (Treatment B), Placebo (Treatment C), Morphine (Treatment D)
Drug · Other
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years to 55 Years · Male only
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 2 Interventional

A Study Comparing the Analgesic Activity of Extended Release Hydrocodone/Acetaminophen (Vicodin® CR) and Placebo in Subjects With Pain Following Bunionectomy Surgery

NCT00404391
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
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
4
States / cities
Owing Mills, Maryland • Austin, Texas • San Marcos, Texas + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2011 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Results available

A Controlled Study to Determine the Efficacy and Safety of CL-108 5 mg for Acute Pain and the Prevention of OINV

NCT03657810
View directory record Official record
Conditions
Pain, Nausea, Vomiting
Interventions
CL-108 5 mg, Norco, Placebo
Drug
Lead sponsor
Charleston Laboratories, Inc
Industry
Eligibility
18 Years and older
Enrollment
349 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
5
States / cities
Phoenix, Arizona • Pasadena, Maryland • Austin, Texas + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 4 Interventional Results available

Intravenous Versus Oral Acetaminophen in Primary Total Hip Arthroplasty

NCT02839876
View directory record Official record
Conditions
Osteoarthritis, Acetaminophen, Arthroplasty, Hip Replacement
Interventions
Intravenous acetaminophen, Oral acetaminophen
Drug
Lead sponsor
Duke University
Other
Eligibility
56 Years to 85 Years
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 8, 2021 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 4 Interventional Results available

Prospective, Double Blind, Placebo Control, Bariatric IV Ace

NCT02452320
View directory record Official record
Conditions
Obesity
Interventions
intravenous acetaminophen, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
136 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 19, 2018 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Not applicable Interventional Results available

Pain and Anxiety Management With Oral Narcotic for Pediatric Suture Repair

NCT01053637
View directory record Official record
Conditions
Children, Lacerations, Procedures, Child, Pain
Interventions
hydrocodone/acetaminophen, Sugar water
Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
2 Years to 17 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Not applicable Interventional Results available

Effect of Ibuprofen on Postoperative Opiate Medication Use and Shoulder Functional Outcomes

NCT02588027
View directory record Official record
Conditions
Rotator Cuff Tear Arthropathy
Interventions
Ibuprofen, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Study to Learn How Well a Single Dose of the Study Treatment Naproxen Sodium and Caffeine Combined in One Tablet (Fixed-dose Combination) Works to Relieve Pain After Dental Surgeries Compared to the Single Ingredients and to Placebo

NCT05485805
View directory record Official record
Conditions
Postoperative Dental Pain
Interventions
Naproxen sodium and caffeine (BAY2880376), Naproxen sodium (Aleve), Caffeine, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
16 Years and older
Enrollment
541 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Results available

TREXIMET® Versus Butalbital-containing Combination Medications for the Acute Treatment of Migraine in Adults

NCT00573170
View directory record Official record
Conditions
Migraine Disorders, Migraine, Acute
Interventions
TREXIMET®, Butalbital-containing Combination Medications (BCM), placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
375 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
107
States / cities
Chandler, Arizona • Gilbert, Arizona • Litchfield Park, Arizona + 94 more
Source: ClinicalTrials.gov public record
Updated Dec 28, 2010 · Synced Sep 6, 2026, 5:23 AM EDT
Withdrawn Phase 2 Interventional

Maxi-Analgesic Phase 2 Study to Compare the Analgesic Effects in Different Dosing Groups to Treat Teeth Extraction Pain

NCT01104844
View directory record Official record
Conditions
Dental Pain
Interventions
Full Dose Strength, Quarter dose strength, Half dose strength, Acetaminophen standard dose, Ibuprofen low dose, Ibuprofen high dose, Placebo
Drug
Lead sponsor
AFT Pharmaceuticals, Ltd.
Industry
Eligibility
16 Years to 40 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 11, 2013 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 4 Interventional Results available

Are Opioids Needed After ACL Reconstruction

NCT04285853
View directory record Official record
Conditions
Anterior Cruciate Ligament Rupture
Interventions
Oxycodone, Placebo oral tablet
Drug
Lead sponsor
Emory University
Other
Eligibility
14 Years to 40 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
3
States / cities
Atlanta, Georgia • Tucker, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 10, 2023 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Not applicable Interventional Results available

High Pain Intervention in Cesarean Sections

NCT01298778
View directory record Official record
Conditions
Other Chronic Postoperative Pain
Interventions
Duramorph 150, Acetaminophen, Duramorph 300
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 9, 2018 · Synced Sep 6, 2026, 5:23 AM 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 6, 2026, 5:23 AM EDT
Completed Phase 2 Interventional Results available

A Pilot Study Assessing the Treatment Responsiveness of a Novel Osteoarthritis Stiffness Scale

NCT03570554
View directory record Official record
Conditions
Osteoarthritis, Knee
Interventions
Naproxen Sodium (Aleve, BAY117031), Acetaminophen ER, Celecoxib, Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
40 Years to 80 Years
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
5
States / cities
Chandler, Arizona • Pinellas Park, Florida • Chicago, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2020 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Results available

Maxigesic IV Phase 3 Bunionectomy Study

NCT02689063
View directory record Official record
Conditions
Post Operative Pain
Interventions
Maxigesic IV, IV Acetaminophen, IV Ibuprofen, Placebo IV
Drug
Lead sponsor
AFT Pharmaceuticals, Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
276 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
2
States / cities
Pasadena, Maryland • Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 5, 2021 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 4 Interventional Results available

Acetaminophen (Tylenol) for Mood and Memory Changes Associated With Corticosteroid Therapy

NCT00377364
View directory record Official record
Conditions
Asthma, Rheumatic Disease
Interventions
Drug: Acetaminophen, Drug: Placebo
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 4, 2016 · Synced Sep 6, 2026, 5:23 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Effects of Xenin-25 on Insulin Secretion and Gastric Emptying in Humans With and Without a Complete Truncal Vagotomy

NCT01951716
View directory record Official record
Conditions
Does the Vagus Nerve Mediate the Effects of Xenin-25
Interventions
Graded Glucose Infusion with Placebo, Graded Glucose Infusion with GIP Alone, Graded Glucose Infusion with xenin-25 alone, Graded Glucose Infusion with GIP plus xenin-25, Meal Tolerance Test with Placebo, Meal Tolerance Test with xenin-25
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Evaluate Onset of Action of a Fast Release Aspirin

NCT01420094
View directory record Official record
Conditions
Healthy Subjects
Interventions
Acetylsalicyclic acid (Fast release Aspirin, BAY1019036), Acetaminophen (Tylenol extra strength), Placebo
Drug
Lead sponsor
Bayer
Industry
Eligibility
16 Years to 45 Years
Enrollment
510 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Dec 18, 2018 · Synced Sep 6, 2026, 5:23 AM EDT
Not yet recruiting Phase 2 Interventional

Jaw Muscle Pain Post Wisdom Molar Surgery

NCT07094542
View directory record Official record
Conditions
Post Operative Pain, Impacted Third Molar Tooth, Muscle Pain
Interventions
Temporo-masseteric Nerve Block Injection, Oral Pain Medications only
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Newark, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Results available

To Evaluate the Safety and Efficacy of Acetaminophen 650 mg and 1000mg in Dental Pain After Surgery

NCT01115673
View directory record Official record
Conditions
Pain
Interventions
Acetaminophen, Placebo Control
Drug
Lead sponsor
McNeil Consumer Healthcare Division of McNEIL-PPC, Inc.
Industry
Eligibility
16 Years to 50 Years
Enrollment
540 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 27, 2012 · Synced Sep 6, 2026, 5:23 AM 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 4, 2026 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 3 Interventional Results available

Ibuprofen/Acetaminophen Versus Nurofen Plus® and Panadeine® Extra Dental Pain Study

NCT01229449
View directory record Official record
Conditions
Post-operative Pain
Interventions
Ibuprofen/acetaminophen, Ibuprofen/acetaminophen (higher dose), Nurofen Plus®, Panadeine® Extra, Placebo
Drug
Lead sponsor
Reckitt Benckiser LLC
Industry
Eligibility
16 Years and older
Enrollment
678 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Sep 16, 2018 · Synced Sep 6, 2026, 5:23 AM EDT
Completed Phase 2 Interventional Results available

The Preventive Treatment of Migraine With Low-Dose Naltrexone and Acetaminophen Combination

NCT03194555
View directory record Official record
Conditions
Migraine With or Without Aura
Interventions
Low-Dose Naltrexone and Acetaminophen Combination, Placebo
Drug
Lead sponsor
Allodynic Therapeutics, Inc
Industry
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
North Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 9, 2024 · Synced Sep 6, 2026, 5:23 AM EDT