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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Proton Pump Inhibitors Clear all
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 Jul 22, 2026, 8:28 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does Omeprazole Decrease Intestinal Calcium Absorption?

NCT00582972
View directory record Official record
Conditions
Osteoporosis, Achlorhydria, GERD, Hip Fracture
Interventions
Omeprazole
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 14, 2013 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Relative Bioavailability and Impact of Rabeprazole for PF-07799933, Food-Effect for PF-07799933 and PF-07799544

NCT07563894
View directory record Official record
Conditions
Healthy
Interventions
PF-07799933 tablets with PF-07799544 fasted, PF-07799933 film-coated tablets with PF-07799544 fasted, PF-07799933 film-coated tablets with PF-07799544 fed, PF-07799933 film-coated tablets fasted, PF-07799933 film-coated tablets following rabeprazole pretreatment fasted
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Jul 22, 2026, 8:28 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Withdrawn Phase 2 Interventional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 Jul 22, 2026, 8:28 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 Jul 22, 2026, 8:28 AM EDT
Withdrawn Phase 4 Interventional Accepts healthy volunteers

Study of Proton Pump Inhibitors (PPI) to Prevent Strictures After Gastric Bypass Surgery

NCT00361985
View directory record Official record
Conditions
Anastomotic Stricture, Morbid Obesity
Interventions
Esomeprazole
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 3 Interventional

The Role of Tegaserod Therapy in the Management of Dyspeptic Symptoms in Female Patients on Proton Pump Inhibitors for the Treatment of Heartburn.

NCT00171470
View directory record Official record
Conditions
Dyspepsia
Interventions
Tegaserod
Drug
Lead sponsor
Novartis
Industry
Eligibility
18 Years and older · Female only
Enrollment
60 participants
Timeline
2005 – 2006
U.S. locations
1
States / cities
East Hanover, New Jersey
Source: ClinicalTrials.gov public record
Updated Jan 31, 2008 · Synced Jul 22, 2026, 8:28 AM EDT
Terminated Phase 4 Interventional Results available

Safety and Efficacy of Lansoprazole 30mg Twice Daily in Treatment of Laryngitis Associated With Gastroesophageal Reflux

NCT00369265
View directory record Official record
Conditions
Laryngopharyngeal Reflux
Interventions
Lansoprazole, Sugar pill
Drug · Dietary Supplement
Lead sponsor
American Institute for Voice and Ear Research
Other
Eligibility
18 Years to 89 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
3
States / cities
Detroit, Michigan • Philadelphia, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 23, 2012 · Synced Jul 22, 2026, 8:28 AM EDT
Terminated Phase 3 Interventional

Esophageal Metaplasia Using a Novel Antibody: Reversibility by Proton Pump Inhibitor

NCT00161200
View directory record Official record
Conditions
Esophageal Metaplasia
Interventions
Ranitidine & Pantoprazole
Drug
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2006
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 10, 2009 · Synced Jul 22, 2026, 8:28 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 Jul 22, 2026, 8:28 AM EDT
Terminated Phase 3 Interventional Results available

A Trial of IW-3718 for 8 Weeks in Patients With Persistent Gastroesophageal Reflux Disease (GERD) Receiving Proton Pump Inhibitors (PPIs)

NCT03561090
View directory record Official record
Conditions
Gastroesophageal Reflux Disease (GERD)
Interventions
IW-3718, placebo, Standard-dose PPIs QD
Drug
Lead sponsor
Ironwood Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
495 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
93
States / cities
Anniston, Alabama • Mobile, Alabama • Phoenix, Arizona + 81 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2021 · Synced Jul 22, 2026, 8:28 AM 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 15, 2022 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1Phase 2 Interventional

Deprescribing Proton Pump Inhibitors to Reduce Post-TIPS Hepatic Encephalopathy

NCT05070351
View directory record Official record
Conditions
Hepatic Encephalopathy
Interventions
PPI deprescribing
Drug
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 22, 2025 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Proton Pump Inhibitors on Endothelial Function

NCT02022280
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Lansoprazole, Placebo
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 22, 2022 · Synced Jul 22, 2026, 8:28 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 Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Assess Pharmacokinetics (PK) of Brensocatib Alone and With Multiple Doses of Rifampin or Esomeprozole in Healthy Participants

NCT05826574
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Brensocatib, Rifampin, Esomeprazole
Drug
Lead sponsor
Insmed Incorporated
Industry
Eligibility
18 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 20, 2023 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Pilot Study To Investigate The Effect Of Concurrent Antacid Administration On The Bioavailability Of Six Experimental Formulations Of Palbociclib

NCT02311946
View directory record Official record
Conditions
Healthy
Interventions
Palbociclib Alone, Palbociclib + Rabeprazole
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
3
States / cities
Miami, Florida • South Miami, Florida
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

HMPL-689 Drug Interaction Study With CYP3A Inhibitor/CYP2C9 Inhibitor/CYP3A Inducer/PPI

NCT05602597
View directory record Official record
Conditions
Relapsed or Refractory Lymphoma
Interventions
Itraconazole 200 mg, Fluconazole 400 mg, Rifampin 600 mg, Rabeprazole 40 mg
Drug
Lead sponsor
Hutchmed
Industry
Eligibility
18 Years to 55 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Mar 5, 2024 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

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

NCT05319912
View directory record Official record
Conditions
Healthy
Interventions
ALXN1840 Enteric-coated Tablet, ALXN1840 Non-coated Capsule, 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 Jul 22, 2026, 8:28 AM EDT
Completed Phase 2 Interventional

A Study to Evaluate the Efficacy and Safety of Arbaclofen Placarbil (XP19986) as Adjunctive Therapy in Subjects With Gastroesophageal Reflux Disease (GERD)

NCT00978016
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
arbaclofen placarbil-Cohort 1, Placebo-Cohort 5, arbaclofen placarbil-Cohort 2, arbaclofen placarbil-Cohort 3, arbaclofen placarbil-Cohort 4, PPI
Drug
Lead sponsor
XenoPort, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
460 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
62
States / cities
Huntsville, Alabama • Chandler, Arizona • Mesa, Arizona + 56 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2021 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Obesity on Proton Pump Inhibitors

NCT04248335
View directory record Official record
Conditions
Pediatric Obesity, NAFLD, GERD
Interventions
Lansoprazole, Pantoprazole, Midazolam
Drug
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
6 Years to 21 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Not applicable Interventional Results available

A Clinical Trial of Proton Pump Inhibitors to Treat Children With Chronic Otitis Media With Effusion

NCT00546117
View directory record Official record
Conditions
Otitis Media With Effusion
Interventions
lansoprazole, placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
2 Years to 12 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 31, 2018 · Synced Jul 22, 2026, 8:28 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Esomeprazole on the Pharmacokinetics of Oral Treprostinil

NCT00963027
View directory record Official record
Conditions
Hypertension, Pulmonary, Pulmonary Arterial Hypertension
Interventions
Treprostinil diethanolamine, Esomeprazole
Drug
Lead sponsor
United Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 7, 2010 · Synced Jul 22, 2026, 8:28 AM 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 6, 2019 · Synced Jul 22, 2026, 8:28 AM EDT