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ClinicalTrials.gov public records Last synced Oct 11, 2026, 2:06 PM EDT

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Showing 25–48 of 74 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: omeprazole (proton pump inhibitor) Clear all
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effect of Proton Pump Inhibitors on Gut Microbiota and Systemic Inflammation in Older Adults

NCT02844621
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Omeprazole
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
60 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 20, 2017 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Gastric pH and Anthocyanin Absorption

NCT01122160
View directory record Official record
Conditions
Anthocyanin Metabolism
Interventions
omeprazole, placebo
Drug
Lead sponsor
USDA Beltsville Human Nutrition Research Center
Federal
Eligibility
22 Years to 59 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 23, 2013 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

Study of Acid Reflux in Asthma

NCT00069823
View directory record Official record
Conditions
Asthma, Lung Diseases, Lung Diseases, Obstructive
Interventions
Esomeprazole, Placebo proton pump inhibitor
Drug
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years and older
Enrollment
403 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
20
States / cities
Birmingham, Alabama • San Diego, California • Denver, Colorado + 17 more
Source: ClinicalTrials.gov public record
Updated Dec 19, 2012 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 1 Interventional

A Study to Examine the Effects of Esomeprazole on the Pharmacokinetics of Orally Administered Lapatinib in Subjects With Metastatic ErbB2 Positive Breast Cancer

NCT00849329
View directory record Official record
Conditions
Neoplasms, Breast
Interventions
lapatinib, lapatinib plus esomeprazole
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Greenville, South Carolina
Source: ClinicalTrials.gov public record
Updated Nov 14, 2017 · Synced Oct 11, 2026, 2:06 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 11, 2026, 2:06 PM EDT
Completed No phase listed Observational

Positive Predictive Value of the Dx-pH Probe for Predicting PPI Response in LPR

NCT01755221
View directory record Official record
Conditions
Laryngopharyngeal Reflux (LPR), Extraesophageal Reflux, Reflux Laryngitis, Posterior Laryngitis
Interventions
Not listed
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 89 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Long-term Use of Proton Pump Inhibitors May Cause Vitamin B12 Deficiency in the Institutionalized Elderly

NCT00843453
View directory record Official record
Conditions
Vitamin B12 Deficiency
Interventions
blood collection, treatment (cyanocobalamin nasal spray)
Other · Drug
Lead sponsor
University of Delaware
Other
Eligibility
60 Years to 89 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2008
U.S. locations
2
States / cities
Manchester, Maryland • Timonium, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 23, 2009 · Synced Oct 11, 2026, 2:06 PM EDT
Not yet recruiting Phase 3 Interventional

Personalized vs Standard of Care Treatment for Helicobacter Pylori Eradication Among Veterans

NCT07104318
View directory record Official record
Conditions
Helicobacter Pylori
Interventions
Bismuth quadruple therapy with optimized proton pump inhibitor (PPI), Bismuth quadruple therapy with standard proton pump inhibitor (PPI), Clarithromycin triple therapy with optimized proton pump inhibitor (PPI), Clarithromycin triple therapy with standard PPI, Standard bismuth quadruple therapy
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
360 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2030
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 3 Interventional Results available

Safety and Efficacy Study of Viokase® 16 for the Correction of Steatorrhea

NCT00559364
View directory record Official record
Conditions
Exocrine Pancreatic Insufficiency, Chronic Pancreatitis, Pancreatectomy
Interventions
Viokase® 16, Placebo, Proton pump inhibitor (PPI), Omeprazole
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Mar 16, 2017 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study of ALXN1840 (Non-coated) Administered With And Without Omeprazole In Healthy Adults

NCT05319899
View directory record Official record
Conditions
Healthy
Interventions
ALXN1840, Omeprazole
Drug
Lead sponsor
Alexion Pharmaceuticals, Inc.
Industry
Eligibility
19 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Oct 11, 2026, 2:06 PM EDT
Withdrawn Phase 2 Interventional

A Phase II Trial of Proton Pump Inhibitors With Chemotherapy in Patients With Metastatic Head and Neck Cancer

NCT02013453
View directory record Official record
Conditions
Cancer of Head and Neck
Interventions
Omeprazole, Carboplatin, 5FU, Paclitaxel, Pemetrexed
Drug
Lead sponsor
University of Michigan Rogel Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2013
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 2, 2014 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study of Effect of Food and a Proton Pump Inhibitor on Selpercatinib (LY3527723) in Healthy Participants

NCT05468164
View directory record Official record
Conditions
Healthy
Interventions
Selpercatinib, Omeprazole
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 19, 2025 · Synced Oct 11, 2026, 2:06 PM EDT
Withdrawn Phase 2 Interventional

Whether Proton Pump Inhibitors, Administered Prior to or After Surgery, Can Reduce the Incidence and/or Severity of Difficulty Swallowing Foods and/or Liquids,Following Anterior Cervical Surgery

NCT03488147
View directory record Official record
Conditions
Dysphagia, GERD, Degenerative Joint Disease
Interventions
Esomeprazole, Placebo Oral Tablet
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 23, 2020 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Drug Interaction With Proton Pump Inhibitors for Nifedipine ER Tablets

NCT03100838
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Nifedipine 60 MG Extended Release Oral Tablet, omeprazole/sodium bicarbonate, SmartPill (TM)
Drug · Device
Lead sponsor
Food and Drug Administration (FDA)
Federal
Eligibility
18 Years to 55 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 16, 2019 · Synced Oct 11, 2026, 2:06 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 11, 2026, 2:06 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Symptom Control Satisfaction With Proton Pump Inhibitor Regimen

NCT02623816
View directory record Official record
Conditions
Heartburn
Interventions
Optimal Dosing of Omeprazole
Drug
Lead sponsor
MetroHealth Medical Center
Other
Eligibility
18 Years and older
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 25, 2022 · Synced Oct 11, 2026, 2:06 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 11, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

A Trial of IW-3718 for 8 Weeks in Patients With Symptomatic Gastroesophageal Reflux Disease (GERD)

NCT02637557
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
IW-3718, Matching Placebo, PPI
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
282 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
62
States / cities
Dothan, Alabama • Phoenix, Arizona • Tucson, Arizona + 54 more
Source: ClinicalTrials.gov public record
Updated Oct 15, 2019 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 4 Interventional Results available

Pilot Study To Investigate The Association Between Acid Control And Heartburn Symptoms After Proton Pump Inhibitor Treatment

NCT02708355
View directory record Official record
Conditions
Heartburn
Interventions
Esomeprazole 20 mg, Placebo
Drug
Lead sponsor
Pfizer
Industry
Eligibility
22 Years to 65 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
2
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 19, 2017 · Synced Oct 11, 2026, 2:06 PM EDT
Recruiting Not applicable Interventional

GERD Infant Feeding Therapeutics Trial (GIFT Trial)

NCT06114836
View directory record Official record
Conditions
GERD in Infants
Interventions
Omeprazole, AR formula
Drug · Other
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
1 Day to 8 Months
Enrollment
369 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 2 Interventional Results available

Proton Pump Inhibitors (PPI) and Fat Absorption in Cystic Fibrosis (CF) and Exocrine Pancreatic Insufficiency (EPI)

NCT03551691
View directory record Official record
Conditions
Pancreatic Insufficiency, Cystic Fibrosis
Interventions
Omeprazole 20mg Capsule, Placebo oral capsule
Drug
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
12 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 3 Interventional

Management of Myocardial Injury After Noncardiac Surgery Trial

NCT01661101
View directory record Official record
Conditions
Myocardial Injury After Noncardiac Surgery (MINS)
Interventions
Dabigatran, Placebo (for Dabigatran), Omeprazole, Placebo (for Omeprazole)
Drug
Lead sponsor
Population Health Research Institute
Other
Eligibility
45 Years and older
Enrollment
1,754 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
7
States / cities
Kansas City, Kansas • Buffalo, New York • Rochester, New York + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 26, 2018 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 4 Interventional Results available

The CALIBER Study Randomized Controlled Trial of LINX Versus Double-Dose Proton Pump Inhibitor Therapy for Reflux Disease

NCT02505945
View directory record Official record
Conditions
GERD Gastroesophageal Reflux Disease
Interventions
Omeprazole, LINX Reflux Management System
Drug · Device
Lead sponsor
Torax Medical Incorporated
Industry
Eligibility
21 Years and older
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
21
States / cities
Mobile, Alabama • Heber Springs, Arkansas • Los Angeles, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jan 7, 2019 · Synced Oct 11, 2026, 2:06 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate the Safety, Tolerability Pharmacokinetics, and Pharmacodynamics of a New Spray Dried Dispersion (SDD) Formulation of CC-11050 After Single Dose of CC-11050 and to Evaluate the Pharmacokinetics of CC-11050 Under Fasted and Fed Conditions and After Coadministration With Omeprazole

NCT04139226
View directory record Official record
Conditions
Healthy Volunteers
Interventions
CC-11050
Drug
Lead sponsor
Amgen
Industry
Eligibility
18 Years to 55 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 22, 2020 · Synced Oct 11, 2026, 2:06 PM EDT