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ClinicalTrials.gov public records Last synced Oct 17, 2026, 2:14 AM EDT

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Showing 217–240 of 316 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Omeprazole Clear all
Completed Phase 4 Interventional Accepts healthy volunteers

Study of 24-hour Intragastric pH Profiles of Esomeprazole 40 mg and Lansoprazole 30 mg in Healthy Volunteer Subjects

NCT00230516
View directory record Official record
Conditions
Healthy
Interventions
Nexium, Prevacid
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
2
States / cities
Los Angeles, California • Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jan 4, 2013 · Synced Oct 17, 2026, 2:14 AM 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 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study on Effects of BMS-955176 on the Pharmacokinetics of Probe Substrates

NCT02578277
View directory record Official record
Conditions
HIV Infections
Interventions
CYP and transporter probe substrates, BMS-955176, BMS-955176 plus CYP and transporter probe substrates
Drug
Lead sponsor
ViiV Healthcare
Industry
Eligibility
18 Years to 50 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 13, 2018 · Synced Oct 17, 2026, 2:14 AM EDT
Terminated Phase 4 Interventional Results available

Pancreatic Enzyme Supplementation for Celiac Disease

NCT02475369
View directory record Official record
Conditions
Celiac Disease
Interventions
pancrelipase
Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 12, 2021 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Phase 1 Study to Evaluate the Effects of Omeprazole and Famotidine on the Absorption of Telotristat Ethyl in Healthy Subjects

NCT03302845
View directory record Official record
Conditions
Drug-drug Interaction
Interventions
Omeprazole 40 MG, Famotidine 40 mg, Telotristat ethyl 250 mg
Drug
Lead sponsor
Lexicon Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Apr 25, 2018 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Examing The Effect Of Omeprazole On Safety, Tolerability And How The Body Processes An Experimental Drug

NCT00644839
View directory record Official record
Conditions
Obesity
Interventions
CP-945,598
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 55 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 13, 2009 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1Phase 2 Interventional Results available

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 Sep 10, 2026 · Synced Oct 17, 2026, 2:14 AM EDT
Terminated Early Phase 1 Interventional

High Dose Omeprazole in Patients With Pancreatic Cancer

NCT04930991
View directory record Official record
Conditions
Exocrine Pancreatic Cancer
Interventions
Omeprazole
Drug
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 100 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Trial to Evaluate the Effect of the Proton Pump Inhibitor Esomeprazole on the Single-dose Pharmacokinetics (PK) of Oral TAK-906 in Healthy Adult Participants

NCT03849690
View directory record Official record
Conditions
Healthy Volunteers
Interventions
TAK-906, Esomeprazole
Drug
Lead sponsor
Millennium Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 15, 2021 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Pharmacokinetics and Safety of GSK1325756 in Elderly Subjects and Adult Subjects of in the Fed and Fasted States and in the Presence of a Proton Pump Inhibitors

NCT01209104
View directory record Official record
Conditions
Nutritional Status
Interventions
GSK1325756
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
40 Years to 80 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 4 Interventional Results available

Levothyroxine Sodium in Thyroidectomized Patients Taking Proton Pump Inhibitors

NCT03094416
View directory record Official record
Conditions
Hypothyroidism;Postablative
Interventions
levothyroxine sodium capsule, Proton pump inhibitor (PPI), Levothyroxine Sodium (LT4) Tablets
Drug
Lead sponsor
IBSA Institut Biochimique SA
Industry
Eligibility
18 Years to 65 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
9
States / cities
La Jolla, California • Ventura, California • Washington D.C., District of Columbia + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 5, 2022 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Results available

A Study of Mirikizumab in Participants With Plaque Psoriasis

NCT03718884
View directory record Official record
Conditions
Psoriasis
Interventions
Drug Cocktail, Mirikizumab
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
3
States / cities
Anaheim, California • DeLand, Florida • High Point, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 29, 2024 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clopidogrel Pharmacogenetics (PGX) Bench to Bedside

NCT01341600
View directory record Official record
Conditions
Metabolism of Clopidogrel
Interventions
Clopidogrel, Omeprazole/Clopidogrel
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
20 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Lancaster, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 30, 2024 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

A Study of Imlunestrant (LY3484356) in Female Healthy Participants

NCT05444556
View directory record Official record
Conditions
Healthy
Interventions
Imlunestrant, Repaglinide, Omeprazole, Dextromethorphan, Quinidine, Rosuvastatin, Digoxin
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
113 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
3
States / cities
Cypress, California • South Miami, Florida • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Dec 12, 2025 · Synced Oct 17, 2026, 2:14 AM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Drug-Drug Interaction Study to Evaluate the Effects of Ecopipam on the Pharmacokinetics of Multiple Substrates

NCT04764851
View directory record Official record
Conditions
Drug-Interactions
Interventions
ecopipam HCl ~2mg/kg/day, Cohort 1 Probe Cocktail, Cohort 2 Probe Cocktail, Cohort 3 Probe Cocktail
Drug · Combination Product
Lead sponsor
Emalex Biosciences Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated May 24, 2021 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study Evaluating the Effect on Gastroduodenal Mucosa of PA32540, PA32540 and Celecoxib, and Aspirin With Celecoxib

NCT00700687
View directory record Official record
Conditions
Healthy
Interventions
PA32540, PA32540 and celecoxib, aspirin and [NSAID]
Drug
Lead sponsor
POZEN
Industry
Eligibility
50 Years and older
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Anaheim, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2009 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

GSK1325756 Relative Bioavailability Study in Healthy Elderly Subjects

NCT03457727
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Danirixin, Omeprazole
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
65 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated May 19, 2021 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 3 Interventional Results available

Phase 3/Safety & Efficacy of Esomeprazole in Infants

NCT00468559
View directory record Official record
Conditions
Gastroesophageal Reflux Disease (GERD)
Interventions
Open Label Run In Esomeprazole, Double Blind Esomeprazole, Double Blind Placebo
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
1 Month to 11 Months
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
14
States / cities
Phoenix, Arizona • Atlanta, Georgia • Park Ridge, Illinois + 11 more
Source: ClinicalTrials.gov public record
Updated Jun 2, 2014 · Synced Oct 17, 2026, 2:14 AM 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 17, 2026, 2:14 AM EDT
Completed Not applicable Interventional Results available

Neonatal Gastro-Esophageal Reflux Disease (GERD) Management Trial

NCT02486263
View directory record Official record
Conditions
Gastroesophageal Reflux Disease
Interventions
Study Arm - acid suppression plus feeding bundle, Conventional arm - acid suppression only
Other
Lead sponsor
Sudarshan Jadcherla
Other
Eligibility
34 Weeks to 60 Weeks
Enrollment
76 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2020
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 29, 2020 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

An Open Label, Single Dose, Three Part Study to Assess the Effects of Rolapitant (2 mg/mL IV Solution) on the Pharmacokinetics of Digoxin; Sulfasalazine; and the Cooperstown Cocktail (Midazolam, Omeprazole, Warfarin, Caffeine, and Dextromethorphan in Healthy Subjects

NCT02434861
View directory record Official record
Conditions
Chemotherapy-induced Nausea and Vomiting
Interventions
Rolapitant, Digoxin, Sulfasalazine, Cooperstown Cocktail
Drug
Lead sponsor
Tesaro, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 25, 2015 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Drug Interaction Study of GBT440 With Caffeine, S-warfarin, Omeprazole, and Midazolam in Healthy Subjects

NCT02567682
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
GBT440
Drug
Lead sponsor
Global Blood Therapeutics
Industry
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Apr 12, 2017 · Synced Oct 17, 2026, 2:14 AM EDT
Completed Phase 4 Interventional Results available

High Dose Dual Therapy vs Clarithromycin Triple Therapy for Treatment Naive H Pylori Infection in an Urban Population

NCT05342532
View directory record Official record
Conditions
Helicobacter Pylori Infection
Interventions
Amoxicillin, Omeprazole, Clarithromycin
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Oct 17, 2026, 2:14 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 2, 2023 · Synced Oct 17, 2026, 2:14 AM EDT