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ClinicalTrials.gov public records Last synced Jul 21, 2026, 10:21 PM EDT

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Showing 1–5 of 5 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Does Omeprazole Decrease Intestinal Calcium Absorption?

NCT00582972
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
Completed Not applicable Interventional Accepts healthy volunteers

Cobalamin Absorption From Fortified Food

NCT01399164
Conditions
Vitamin B-12 Deficiency, Achlorhydria
Interventions
14C-B12 fortified bread
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
60 Years and older
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Davis, California
Completed Phase 1 Interventional Accepts healthy volunteers

Assessment of Gastric pH Changes Induced by Ascorbic Acid Tablets

NCT04199624
Conditions
Hypochlorhydria
Interventions
Omeprazole 20mg, Vitamin C
Drug · Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Indianapolis, Indiana
Conditions
Achlorhydria, Gastrinoma, Zollinger Ellison Syndrome
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
1989 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Completed Not applicable Interventional Accepts healthy volunteers Results available

Clinical Experiment of Helicobacter Pylori Transmission

NCT00550368
Conditions
Infection, Achlorhydria
Interventions
Biological intervention: Enteropathogenic E. coli
Biological
Lead sponsor
Stanford University
Other
Eligibility
35 Years to 59 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2009
U.S. locations
1
States / cities
Stanford, California