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ClinicalTrials.gov public records Last synced Oct 16, 2026, 5:43 PM EDT

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Showing 97–120 of 316 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Omeprazole Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

A Parallel Group Study to Compare the Gastroprotective Effects of PA 325 Versus 81 mg Enteric Coated Aspirin

NCT00441519
View directory record Official record
Conditions
Healthy
Interventions
aspirin, omeprazole
Drug
Lead sponsor
POZEN
Industry
Eligibility
50 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 12, 2009 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Voxelotor CYP and Transporter Cocktail Interaction Study

NCT05981365
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Voxelotor, Bupropion, Repaglinide, Flurbiprofen, Omeprazole, Midazolam, Metformin, Furosemide, Rosuvastatin
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Nov 22, 2024 · Synced Oct 16, 2026, 5:43 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Confocal Endomicroscopy for Non-Erosive Reflux Disease Detection

NCT02788591
View directory record Official record
Conditions
Non-erosive Reflux Disease, Gastroesophageal Reflux
Interventions
Proton Pump Inhibitor (PPI) Therapy, Sucralfate
Drug
Lead sponsor
LCMC Health
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
2
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 9, 2022 · Synced Oct 16, 2026, 5:43 PM EDT
Terminated Phase 1 Interventional

A Study to Assess the Effects of Itraconazole, Rifampicin, and Omeprazole on Pharmacokinetics of Adavosertib

NCT04959266
View directory record Official record
Conditions
Advanced Solid Tumours
Interventions
Adavosertib, Itraconazole, Rifampicin, Omeprazole
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 130 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
3
States / cities
Portland, Oregon • Austin, Texas • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 16, 2022 · Synced Oct 16, 2026, 5:43 PM EDT
Withdrawn Phase 4 Interventional

The Study of Eustachian Tube Dysfunction and Laryngopharyngeal Reflux

NCT02123498
View directory record Official record
Conditions
Eustachian Tube Dysfunction, Laryngopharyngeal Reflux
Interventions
Omeprazole, Ranitidine, Pantoprazole, 24-Hour Diagnostic pH-Probe Test, Laryngoscopy
Drug · Procedure
Lead sponsor
Loma Linda University
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
2
States / cities
Loma Linda, California • Redlands, California
Source: ClinicalTrials.gov public record
Updated Sep 26, 2016 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Pharmacokinetic (PK) Study Evaluating Naproxen and Esomeprazole Plasma Levels

NCT00749385
View directory record Official record
Conditions
Arthritis
Interventions
PN 400, EC naproxen plus EC esomeprazole, EC naproxen, EC esomeprazole
Drug
Lead sponsor
POZEN
Industry
Eligibility
18 Years to 55 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Dec 23, 2008 · Synced Oct 16, 2026, 5:43 PM EDT
Not listed Phase 1Phase 2 Interventional

Comparison of Nexium Versus Secretol in the Healing and Controlling of Symptoms in GERD Patients With Severe EE.

NCT01129713
View directory record Official record
Conditions
Gastroesophageal Reflux Disease (GERD), Heartburn, Indigestion
Interventions
Secretol, Nexium
Drug
Lead sponsor
Effexus Pharmaceutical
Industry
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 5, 2014 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Assess the Effect of Itraconazole, Rifampin, and Acid-Reducing Agents on INCB161734 Pharmacokinetics When Administered Orally in Healthy Participants

NCT07018635
View directory record Official record
Conditions
Healthy Participants
Interventions
INCB161734, Itraconazole, Rifampin, Esomeprazole, Famotidine
Drug
Lead sponsor
Incyte Corporation
Industry
Eligibility
18 Years to 55 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 26, 2025 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional

Bendamustine in Combination With Lenalidomide and Dexamethasone in Refractory or Relapsed Multiple Myeloma

NCT01042704
View directory record Official record
Conditions
Myeloma
Interventions
Bendamustine, Lenalidomide, Dexamethasone, Aspirin, Prophylaxis, Antibiotic, Biweekly Follow Up, Cyclical Follow Up, Restaging, Post-Treatment Follow Up
Drug · Other
Lead sponsor
Robert Redner, MD
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
22
States / cities
Detroit, Michigan • Steubenville, Ohio • Beaver, Pennsylvania + 13 more
Source: ClinicalTrials.gov public record
Updated Jul 31, 2017 · Synced Oct 16, 2026, 5:43 PM EDT
Recruiting Phase 4 Interventional

The Mechanism Versus PPI Trial

NCT06999577
View directory record Official record
Conditions
Laryngopharyngeal Reflux, Cough, Throat Clearing, Dysphonia, Reflux
Interventions
Omeprazole 40 MG, Laryngeal Recalibration Therapy, GERD Lifestyle Recommendations
Drug · Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 89 Years
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
San Deigo, California
Source: ClinicalTrials.gov public record
Updated Aug 1, 2025 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug-drug Interaction Study of Clemizole (EPX-100) in Healthy Participants

NCT07824193
View directory record Official record
Conditions
Drug Drug Interaction
Interventions
EPX-100, Itraconazole, Phenytoin, Omeprazole, Midazolam, Bupropion
Drug
Lead sponsor
Epygenix
Industry
Eligibility
18 Years to 55 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Effect of Multiple Doses of Esomeprazole on the Pharmacokinetics of Isavuconazole

NCT02128893
View directory record Official record
Conditions
Pharmacokinetics of Isavuconazole, Healthy Subjects
Interventions
Isavuconazole, Esomeprazole
Drug
Lead sponsor
Astellas Pharma Global Development, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 1, 2014 · Synced Oct 16, 2026, 5:43 PM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Phase 4, Vedolizumab-4002 Post-marketing, Disease-Drug-Drug Interaction Study

NCT02760615
View directory record Official record
Conditions
Colitis, Ulcerative, Crohn Disease
Interventions
Caffeine, Losartan, Omeprazole, Dextromethorphan, Midazolam, Vedolizumab
Drug
Lead sponsor
Takeda
Industry
Eligibility
18 Years to 55 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
2
States / cities
Cypress, California • Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 27, 2020 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study to Investigate the Effect of Esomeprazole and the Effect of Food on the Pharmacokinetics of Balovaptan in Healthy Volunteers

NCT04156646
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
Balovaptan, Esomeprazole
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 16, 2021 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Not applicable Interventional Results available

Proton Pump Inhibitors and Dysbiosis in Cirrhosis

NCT01458990
View directory record Official record
Conditions
Cirrhosis, Healthy
Interventions
Omeprazole
Drug
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 19, 2018 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study in Healthy Subjects to Determine the Effect of Relacorilant on Exposure to Probe Substrates for Cytochrome P450s

NCT03457597
View directory record Official record
Conditions
Healthy
Interventions
Midazolam hydrochloride, Metoprolol tartrate, Pioglitazone hydrochloride, Tolbutamide, Omeprazole, Relacorilant
Drug
Lead sponsor
Corcept Therapeutics
Industry
Eligibility
18 Years to 65 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated May 17, 2018 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Evaluating Effect of Esomeprazole, Omeprazole or Lansoprazole on the Pharmacodynamics (PD) and Pharmacokinetics (PK) of Clopidogrel

NCT01147588
View directory record Official record
Conditions
Healthy
Interventions
lansoprazole, omeprazole, esomeprazole, clopidogrel
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 55 Years
Enrollment
149 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 28, 2011 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

An Open-Label, Randomized, Comparative 3-Way Cross-Over Study to Evaluate the Effect of Food on the 24-Hour Intragastric pH at Day 5 After Twice Daily Oral Administration of PN 200 (Omeprazole/Naproxen) in Healthy Volunteers

NCT00442208
View directory record Official record
Conditions
Healthy
Interventions
PN 200
Drug
Lead sponsor
POZEN
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 22, 2008 · Synced Oct 16, 2026, 5:43 PM EDT
Recruiting Phase 4 Interventional

Efficacy of Ketorolac for Postoperative Pain Management in Hip Arthroscopy

NCT07037888
View directory record Official record
Conditions
Femoracetabular Impingement, Hip Arthroscopy
Interventions
Ketorolac, Control (Standard treatment), Omeprazole
Drug
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years to 89 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 16, 2026, 5:43 PM EDT
Terminated Not applicable Interventional Results available

Effect of Acid Suppression Medication on Pediatric Microbiome

NCT02016820
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Omeprazole (suspension), Lifestyle Modification
Drug · Other
Lead sponsor
Columbia University
Other
Eligibility
0 Years to 4 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 26, 2023 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

PPI and Clopidogrel Response

NCT01170533
View directory record Official record
Conditions
Drug Interaction
Interventions
omeprazole and pantoprazole
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 6, 2012 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Investigate the Effect of GSK1605786 on Hepatic Cytochrome P450, and BCRP and OATP1B1 Transport in Healthy Adult Subjects

NCT01489943
View directory record Official record
Conditions
Crohn's Disease
Interventions
GSK1605786 500 mg, Midazolam 3 mg, Pioglitazone 15 mg, Omeprazole 40 mg, Rosuvastatin 10 mg
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 25, 2017 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 1 Interventional

A Study to Evaluate the Effect of Intravenous (IV) Infusions of Risankizumab on Pharmacokinetics of Cytochome P450 Substrates in Adult Participants With Moderately to Severely Active Ulcerative Colitis or Crohn's Disease

NCT04254783
View directory record Official record
Conditions
Ulcerative Colitis (UC), Crohn's Disease
Interventions
Risankizumab, Cytochrome P450 (CYP) Substrates
Drug
Lead sponsor
AbbVie
Industry
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
4
States / cities
Coronado, California • DeLand, Florida • Margate, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2024 · Synced Oct 16, 2026, 5:43 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Comparison of Prilosec OTC® Versus Zegerid® for Gastric Acid Suppression

NCT00808769
View directory record Official record
Conditions
Normal Healthy Subject Population
Interventions
Zegerid®, Prilosec OTC®
Drug
Lead sponsor
Procter and Gamble
Industry
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 1, 2015 · Synced Oct 16, 2026, 5:43 PM EDT