The Use of Oral Omeprazole and Intravenous Pantoprazole in Patients With Hypersecretion of Gastric Acid

This study has been completed.
Sponsor:
Information provided by:
National Institutes of Health Clinical Center (CC)
ClinicalTrials.gov Identifier:
NCT00001191
First received: November 3, 1999
Last updated: December 11, 2007
Last verified: December 2007
  Purpose

Patients with Zollinger-Ellison Syndrome suffer from ulcers of the upper gastrointestinal tract, higher than normal levels of gastric acid, and tumors of the pancreas known as non-beta islet cell tumors. Patients with Zollinger-Ellison Syndrome require continuous control of their gastric acid secretion. If gastric acid levels are permitted to rise higher than normal, patients may develop severe ulcers and other complications.

This study will attempt to determine the effectiveness of Omeprazole (Prilosec) in the treatment of patients with Zollinger-Ellison Syndrome. Omeprazole is a drug that functions to decrease the amount of gastric acid secreted.

Patients for this study will be selected based on a previous diagnosis of Zollinger-Ellison Syndrome and/or idiopathic (unknown cause) high levels of gastric acid secretion. The patients will undergo an evaluation including history and physical examination as well as necessary laboratory tests. The proper dose of Omeprazole will then be determined in each patient . The proper dose of Omeprazole is considered the minimum amount of omeprazole required to lower gastric acid to a safe level.

Every year patients participating in this study will undergo a physical examination and history. They will be questioned about symptoms associated with Zollinger-Ellison Syndrome. Gastric acid levels will be taken and evaluated and patients will undergo an upper gastrointestinal endoscopy.

The effectiveness of the treatment will be measured by a clinical history to determine the control of symptoms due to high levels of gastric acid secretion.


Condition Intervention Phase
Gastrinoma
Zollinger Ellison Syndrome
Drug: Pantoprazole
Drug: Omeprazole
Phase 2

Study Type: Interventional
Study Design: Primary Purpose: Treatment
Official Title: The Use of Oral Omeprazole and Intravenous Pantoprazole in Patients With Hypersecretion of Gastric Acid

Resource links provided by NLM:


Further study details as provided by National Institutes of Health Clinical Center (CC):

Study Start Date: February 1983
Estimated Study Completion Date: December 2007
Detailed Description:

Patients with Zollinger-Ellison syndrome require continuous control of their gastric acid secretion or else severe complications of peptic ulcer disease will occur. This study investigates the long-term efficacy of the oral gastric acid antisecretory drug, Omeprazole, which functions as a H+ - K+ ATPase inhibitor. Long-term safety will also be investigated. Also investigated is the ability of the parenteral H+-K+ ATPase inhibitor, pantoprazole to control acid secretion short-term, when oral Omeprazole cannot be used.

In this study the proper maintenance dose of oral Omeprazole will be determined in each patient by determining the minimal dose of drug that reduces acid secretion to safe levels. Patients will be examined at least annually for evidence of continued efficacy and safety. Efficacy will be assessed by clinical history to assess control of symptoms due to gastric acid hypersecretion, measurements of gastric acid secretion while on Omeprazole to determine continued effectiveness of the drug and upper gastrointestinal endoscopy to assess changes in the gastrointestinal mucosa. Safety will be determined by assessing clinical and laboratory parameters such as changes in hematologic or clinical chemistry parameters. Possible drug induced changes in the gastric mucosa will be assessed by gastric biopsies.

With intravenous pantoprazole the ability of the recommended dose of 80 mg three times a day to control acid secretion will be investigated and if this fails, 80 mg four times a day will be assessed.

  Eligibility

Ages Eligible for Study:   18 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria
  • INCLUSION CRITERIA:

Subjects for receiving oral Omeprazole will be patients who have idiopathic gastric acid hypersecretion with basal rates of gastric acid secretion of greater than 15 mEq/hr and patients with Zollinger-Ellison syndrome with basal acid output greater than 10mEq/hr are eligible.

Subjects with gastric acid hypersecretory states who are being treated with various antisecretory drugs under the protocols entitled "Medical Therapy of Zollinger-Ellison Syndrome" (89-DK-0015) are eligible.

Patients must be 18 years of age or older.

EXCLUSION CRITERIA:

Female patients of childbearing age who are attempting to become pregnant, are pregnant, or are unwilling to practice effective birth control will be excluded.

Patients who develop adverse reactions or allergic responses to Omeprazole will be excluded.

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00001191

Locations
United States, Maryland
National Institutes of Health Clinical Center, 9000 Rockville Pike
Bethesda, Maryland, United States, 20892
Sponsors and Collaborators
  More Information

Publications:
Richardson CT, Walsh JH. The value of a histamine H2-receptor antagonist in the management of patients with the Zollinger-Ellison syndrome. N Engl J Med. 1976 Jan 15;294(3):133-5.

ClinicalTrials.gov Identifier: NCT00001191     History of Changes
Other Study ID Numbers: 830018, 83-DK-0018
Study First Received: November 3, 1999
Last Updated: December 11, 2007
Health Authority: United States: Federal Government

Keywords provided by National Institutes of Health Clinical Center (CC):
Zollinger-Ellison Syndrome
Gastrinoma
Acid Hypersecretion
H+-K+ ATPase Inhibitor

Additional relevant MeSH terms:
Gastrinoma
Zollinger-Ellison Syndrome
Syndrome
Adenocarcinoma
Carcinoma
Carcinoma, Islet Cell
Digestive System Diseases
Digestive System Neoplasms
Disease
Endocrine Gland Neoplasms
Endocrine System Diseases
Gastrointestinal Diseases
Gastrointestinal Neoplasms
Intestinal Diseases
Neoplasms
Neoplasms by Histologic Type
Neoplasms by Site
Neoplasms, Glandular and Epithelial
Pancreatic Diseases
Pancreatic Neoplasms
Paraneoplastic Endocrine Syndromes
Paraneoplastic Syndromes
Pathologic Processes
Peptic Ulcer
Stomach Diseases
Omeprazole
Pantoprazole
Anti-Ulcer Agents
Enzyme Inhibitors
Gastrointestinal Agents

ClinicalTrials.gov processed this record on October 20, 2014