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Showing 1–24 of 74 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo for IV acetaminophen Clear all
Not listed Not applicable Interventional

Efficacy of IV Acetaminophen in Acute Post-Operative Pain Control in Laparoscopic Roux-en-Y Gastric Bypass Surgery (LRYGBP) Patients

NCT01460667
View directory record Official record
Conditions
Morbid Obesity
Interventions
IV acetaminophen, IV normal saline
Drug
Lead sponsor
McLaren Regional Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2011
U.S. locations
1
States / cities
Flint, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 26, 2011 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 3 Interventional

PANDORA: Delirium Prevention After Cardiac Surgery Using IV Acetaminophen to Prevent Postoperative Delirium in Older Cardiac Surgical Patients

NCT04093219
View directory record Official record
Conditions
Delirium in Old Age, Delirium, Coronary Artery Disease
Interventions
IV acetaminophen, Placebo
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
60 Years and older
Enrollment
900 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
10
States / cities
Birmingham, Alabama • Irvine, California • Los Angeles, California + 5 more
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Assessing Efficacy of Intravenous Acetaminophen for Perioperative Pain Control for Oocyte Retrieval

NCT03073980
View directory record Official record
Conditions
Infertility, Female, Pain, Postoperative
Interventions
IV Acetaminophen, PO Acetaminophen, Placebo IV Acetaminophen, Placebo PO Acetaminophen
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
161 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 25, 2022 · Synced Sep 23, 2026, 7:20 PM EDT
Not listed Phase 3 Interventional

Randomized Trial of Intraoperative IV Versus Preoperative Oral Acetaminophen During Ambulatory Lumbar Discectomy

NCT04574778
View directory record Official record
Conditions
Pain, Postoperative, Spine Surgery
Interventions
Acetaminophen
Drug
Lead sponsor
Rothman Institute Orthopaedics
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2024 · Synced Sep 23, 2026, 7:20 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 19, 2025 · Synced Sep 23, 2026, 7:20 PM EDT
Terminated Phase 4 Interventional Results available

Prochlorperazine Versus Acetaminophen, Aspirin, and Caffeine for the Treatment of Acute Migraine

NCT01629329
View directory record Official record
Conditions
Migraine Headaches
Interventions
Aspirin, Acetaminophen, Caffeine pills, Prochlorperazine 10mg
Drug
Lead sponsor
Albert Einstein Healthcare Network
Other
Eligibility
18 Years to 65 Years
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 17, 2020 · Synced Sep 23, 2026, 7:20 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 29, 2022 · Synced Sep 23, 2026, 7:20 PM 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 1, 2022 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

Efficacy of IV Acetaminophen for Pain Management

NCT02028715
View directory record Official record
Conditions
Post-operative Pain
Interventions
Placebo, IV acetaminophen
Drug
Lead sponsor
Aultman Health Foundation
Other
Eligibility
18 Years to 85 Years · Female only
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Canton, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 15, 2019 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

Study of KRYSTEXXA® (Pegloticase) Plus Methotrexate in Participants With Uncontrolled Gout

NCT03994731
View directory record Official record
Conditions
Gout
Interventions
Pegloticase, methotrexate, placebo, folic acid, gout flare prophylaxis regimen, fexofenadine, acetaminophen, methylprednisolone
Biological · Drug · Dietary Supplement
Lead sponsor
Amgen
Industry
Eligibility
18 Years and older
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
60
States / cities
Birmingham, Alabama • Anchorage, Alaska • Flagstaff, Arizona + 54 more
Source: ClinicalTrials.gov public record
Updated Jun 25, 2024 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

Treatment of Acute Sinusitis

NCT00377403
View directory record Official record
Conditions
Acute Respiratory Infections, Acute Rhinosinusitis
Interventions
Acetaminophen, Amoxicillin, Dextromethorphan hydrobromide with guaifenesin, Guaifenesin, Pseudoephedrine Sustained Action, Saline spray (0.65%)
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
172 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 27, 2012 · Synced Sep 23, 2026, 7:20 PM EDT
Terminated Phase 4 Interventional Results available

Clinical, Pharmacological and Molecular Effects of IV and Oral Acetaminophen in Adults With aSAH

NCT02549716
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Stroke
Interventions
IV acetaminophen, Oral acetaminophen, Oral placebo, IV placebo
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 9, 2019 · Synced Sep 23, 2026, 7:20 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Safety, Tolerability, and Pharmacokinetics of UX053 in Patients With Glycogen Storage Disease Type III (GSD III)

NCT04990388
View directory record Official record
Conditions
Glycogen Storage Disease Type III
Interventions
UX053, Placebo, Antipyretic, H2 Blocker, H1 Blocker
Biological · Other · Drug
Lead sponsor
Ultragenyx Pharmaceutical Inc
Industry
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
4
States / cities
Orange, California • Atlanta, Georgia • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 15, 2024 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 3 Interventional Results available

A Multi-Center Study of the Efficacy, Pharmacokinetics (PK) and Pharmacodynamics (PD) of IV Acetaminophen for the Treatment of Acute Pain in Pediatric Patients

NCT01635101
View directory record Official record
Conditions
Acute Pain
Interventions
IV Acetaminophen, IV Control
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
1 Day to 2 Years
Enrollment
197 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
22
States / cities
Birmingham, Alabama • Orange, California • San Diego, California + 19 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2020 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

PO vs. IV Acetaminophen Given Perioperatively for 24 hr Post-op Pain Control Following Total Hip or Knee Replacement

NCT02244619
View directory record Official record
Conditions
Post-op Pain
Interventions
Oral acetaminophen, IV acetaminophen
Drug
Lead sponsor
Kettering Health Network
Other
Eligibility
18 Years and older
Enrollment
515 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Kettering, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 23, 2017 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

Effect of IV Acetaminophen on Patients in the Neurocritical Care Unit

NCT01948505
View directory record Official record
Conditions
Post-operative Craniotomy Patients, Carotid Endarterectomy and Carotid Artery Stenosis Patients, Post-op Spine Patients Admitted to the NCCU, Endovascular Patients Undergoing Intracranial Intervention, Traumatic Brain Injuries NPO for at Least 12 Hours
Interventions
Intravenous acetaminophen, Placebo for IV acetaminophen
Drug
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 90 Years
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 23, 2023 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 3 Interventional Results available

Analgesic Efficacy of Repeated Doses of Intravenous (IV) Acetaminophen in Post-operative Pediatric Spine Fusion Patients

NCT01394718
View directory record Official record
Conditions
Pain, Postoperative
Interventions
Intravenous Acetaminophen, Placebo
Drug · Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
10 Years to 18 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 17, 2016 · Synced Sep 23, 2026, 7:20 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 23, 2024 · Synced Sep 23, 2026, 7:20 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 23, 2026, 7:20 PM EDT
Completed Phase 2Phase 3 Interventional Results available

A Study to Evaluate the Safety of Rituximab Retreatment in Subjects With Systemic Lupus Erythematosus

NCT00137969
View directory record Official record
Conditions
Lupus Erythematosus, Systemic
Interventions
Rituximab, Placebo, Prednisone, Acetaminophen, Diphenhydramine
Drug
Lead sponsor
Genentech, Inc.
Industry
Eligibility
16 Years to 75 Years
Enrollment
262 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
63
States / cities
Birmingham, Alabama • Huntsville, Alabama • Paradise Valley, Arizona + 51 more
Source: ClinicalTrials.gov public record
Updated Aug 19, 2019 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 2 Interventional Results available

Analgesic Effect of IV Acetaminophen in Tonsillectomies

NCT01691690
View directory record Official record
Conditions
Adenotonsillitis, Tonsillitis
Interventions
Acetaminophen (paracetamol), Normal Saline Flush, Midazolam, Sevoflurane, Nitrous Oxide/Oxygen, Propofol, Morphine, Ondansetron, Dexamethasone
Drug
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
2 Years to 9 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 5, 2017 · Synced Sep 23, 2026, 7:20 PM EDT
Terminated Phase 3 Interventional Results available

Post-operative Course of Dexamethasone to Reduce Tonsillectomy Morbidity

NCT04879823
View directory record Official record
Conditions
Adenotonsillectomy, Analgesia, Surgery
Interventions
Dexamethasone, Ibuprofen, Acetaminophen, Placebo
Drug
Lead sponsor
David Chi, MD
Other
Eligibility
3 Years to 17 Years
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania • Sewickley, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 4, 2024 · Synced Sep 23, 2026, 7:20 PM EDT
Completed Phase 4 Interventional Results available

IV Acetaminophen as an Adjunct Analgesic in Cardiac Surgery

NCT01544062
View directory record Official record
Conditions
Acute Pain, Hyperalgesia
Interventions
IV acetaminophen, Placebo
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 75 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 20, 2016 · Synced Sep 23, 2026, 7:20 PM EDT
Withdrawn Phase 4 Interventional

A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study of the Relationship Between Intraoperative Intravenous Acetaminophen and Postoperative Opioid Avoidance for Ambulatory Surgical Procedures

NCT01231191
View directory record Official record
Conditions
Postoperative Pain, Intraoperative and Postoperative Opioid Requirements
Interventions
Intravenous acetaminophen, Intravenous placebo
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Mar 7, 2012 · Synced Sep 23, 2026, 7:20 PM EDT