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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Proton pump inhibitor Clear all
Recruiting Phase 4 Interventional

OPEN Versus InTact Capsule Proton Pump Inhibitors for the Treatment of Marginal Ulcers

NCT05799105
View directory record Official record
Conditions
Marginal Ulcer
Interventions
Omeprazole 40 milligrams
Drug
Lead sponsor
Stephen Firkins
Other
Eligibility
Not listed
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Gastric Acid on Colonic Microbiome

NCT01901276
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Omeprazole 40 mg bid
Drug
Lead sponsor
Daniel Freedberg, MD
Other
Eligibility
18 Years and older · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 14, 2024 · Synced Sep 28, 2026, 10:13 AM EDT
Withdrawn Phase 2 Interventional

Efficacy Study of Botulinum Toxin (BOTOX) Injections to Treat Vocal Fold Granulomas

NCT01678053
View directory record Official record
Conditions
Contact Ulcer of Vocal Folds, Granuloma of Vocal Cords, Granuloma, Laryngeal, Granuloma
Interventions
onabotulinumtoxinA, omeprazole (proton pump inhibitor)
Drug
Lead sponsor
Phillip Song, MD
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 27, 2017 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

A Randomized Trial of Medical and Surgical Treatments for Patients With GERD Symptoms That Are Refractory to Proton Pump Inhibitors

NCT01265550
View directory record Official record
Conditions
GERD
Interventions
Nissen fundoplication, baclofen, Desipramine
Device · Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 64 Years
Enrollment
366 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
15
States / cities
Birmingham, Alabama • Tucson, Arizona • Loma Linda, California + 12 more
Source: ClinicalTrials.gov public record
Updated Jan 21, 2020 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacodynamic and Pharmacokinetic Study of E3710 Following Oral Administration to Healthy, Male, Japanese Subjects

NCT01390714
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
E3710
Drug
Lead sponsor
Eisai Co., Ltd.
Industry
Eligibility
20 Years to 40 Years · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Glendale, California
Source: ClinicalTrials.gov public record
Updated Mar 13, 2012 · Synced Sep 28, 2026, 10:13 AM EDT
Completed No phase listed Observational

Proton Pump Inhibitor (PPI) Therapy for Newly Diagnosed Esophagitis

NCT00586963
View directory record Official record
Conditions
Erosive Esophagitis, Reflux Esophagitis, GERD
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 22, 2010 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Surufatinib DDI With a PPI and a CYP3A Inducer

NCT04510649
View directory record Official record
Conditions
Healthy
Interventions
Part A, Part B
Drug
Lead sponsor
Hutchison Medipharma Limited
Industry
Eligibility
18 Years to 55 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated Jun 17, 2021 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 2 Interventional Results available

Prevention of Post-Cardiac Surgery Acute Kidney Injury by Proton Pump Inhibitor

NCT06154226
View directory record Official record
Conditions
Acute Kidney Injury
Interventions
Pantoprazole, Famotidine
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 90 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Not applicable Interventional

Sponge and Eosinophil Peroxidase (EPO) Staining

NCT03078023
View directory record Official record
Conditions
Eosinophilic Esophagitis
Interventions
swallowed sponge device
Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 14, 2022 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study to Evaluate Safety, Drug Levels, Food and Relative Bioavailability of BMS-986365 in Healthy Adult Male Participants

NCT06417229
View directory record Official record
Conditions
Healthy Participants
Interventions
BMS-986365, Rabeprazole
Drug
Lead sponsor
Celgene
Industry
Eligibility
18 Years to 60 Years · Male only
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Mar 5, 2025 · Synced Sep 28, 2026, 10:13 AM EDT
Completed No phase listed Observational

Economic Outcomes of Enteral and Parenteral Proton Pump Inhibitor (PPI) Use in the Intensive Care Unit (ICU)

NCT00919152
View directory record Official record
Conditions
Stress Ulcer Prophylaxis
Interventions
Not listed
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
534 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Sep 28, 2026, 10:13 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

The Influence of Proton Pump Inhibitors (PPI's) on Blood Levels of 25-Hydroxyvitamin D.

NCT01302704
View directory record Official record
Conditions
Vitamin D
Interventions
Not listed
Lead sponsor
Mike O'Callaghan Military Hospital
Federal
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Nellis Air Force Base, Nevada
Source: ClinicalTrials.gov public record
Updated Nov 24, 2013 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Supplement With and Without a Probiotic

NCT04433208
View directory record Official record
Conditions
Healthy Adult Subjects
Interventions
Complex oligosaccharide, Probiotic, PPI, H2 Blocker
Dietary Supplement · Other
Lead sponsor
Prolacta Bioscience
Industry
Eligibility
18 Years to 44 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Cypress, California
Source: ClinicalTrials.gov public record
Updated Mar 17, 2025 · Synced Sep 28, 2026, 10:13 AM EDT
Not yet recruiting Phase 4 Interventional

Efficacy of Potassium-Competitive Acid Blockers in Barrett's Esophagus (PCAB BE Study)

NCT07788742
View directory record Official record
Conditions
Barrett Esophagus
Interventions
Potassium-Competitive Acid Blockers (PCABs)
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 28, 2026, 10:13 AM 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 18, 2018 · Synced Sep 28, 2026, 10:13 AM 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 1, 2014 · Synced Sep 28, 2026, 10:13 AM EDT
Terminated Not applicable Interventional Results available

COPD Patients Diagnosed With GERD,COPD Exacerbations After Treatment With High Dose PPI

NCT00523367
View directory record Official record
Conditions
Gastroesophageal Reflux, Chronic Obstructive Pulmonary Disease
Interventions
24 hour pH testing
Procedure
Lead sponsor
University of Florida
Other
Eligibility
40 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 17, 2013 · Synced Sep 28, 2026, 10:13 AM 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 14, 2019 · Synced Sep 28, 2026, 10:13 AM EDT
Recruiting Not applicable Interventional

Marginal Ulcer Healing With Low-Thermal Argon Plasma Endoscopic Treatment

NCT06543316
View directory record Official record
Conditions
Roux-en-y Anastomosis Site, Marginal Ulcer, Marginal Ulcer (Peptic) or Erosion, Ulcer, Ulcer, Gastric, Ulcer Gastrointestinal, Abdominal Pain, Nausea, Vomiting, GastroIntestinal Bleeding, Dysphagia, Ulcer Gastrojejunal
Interventions
Low Thermal Plasma (LTP) Treatment, Standard of Care Ulcer Treatment (typically PPI Administration)
Procedure · Other
Lead sponsor
Christopher C. Thompson, MD, MSc
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Sep 28, 2026, 10:13 AM 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 21, 2020 · Synced Sep 28, 2026, 10:13 AM 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 18, 2012 · Synced Sep 28, 2026, 10:13 AM EDT
Completed Phase 2Phase 3 Interventional

Cyrotherapy vs. APC in GAVE

NCT00587405
View directory record Official record
Conditions
Watermelon Stomach
Interventions
cryotherapy, Argon Plasma Coagulation
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 6, 2016 · Synced Sep 28, 2026, 10:13 AM EDT
Terminated No phase listed Observational

Molecular and Epidemiological Risk Factors in the Development of Gastric Cancer

NCT04600466
View directory record Official record
Conditions
Gastric Cancer
Interventions
Molecular testing for all participants., Germline Testing, Survey
Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Sep 28, 2026, 10:13 AM 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 24, 2022 · Synced Sep 28, 2026, 10:13 AM EDT