A Study of Rabeprazole and Pantoprazole on Stomach Acid and Esophageal Acid Exposure in Patients With Gastroesophageal Reflux Disease (GERD) and a History of Nighttime Heartburn

Summary

The purpose of the study is to compare the pharmacodynamics (the way a drug works in the body) of rabeprazole and pantoprazole on intragastric acidity and esophageal acid exposure in gastroesophageal reflux disease (GERD) patients with nighttime heartburn. Patients will be given one dose of each medication with a washout period of 6 to 13 days between doses ("washout period" means they will receive no further proton pump inhibitor medication for 6-13 days, allowing the 1st dose to completely leave their bodies). Rabeprazole is approved in the United States for the short-term treatment (4-8 weeks) in the healing and symptomatic relief of erosive or ulcerative GERD with symptoms of daytime or nighttime heartburn, maintenance of healing of erosive or ulcerative GERD, and treatment of symptomatic GERD. The dosage regimen for all GERD indications is 20 mg once a day. Other indications include healing of duodenal ulcers, Helicobacter pylori eradication to reduce the risk of duodenal ulcer recurrence, and treatment of pathological hypersecretory conditions including Zollinger-Ellison Syndrome. The most common side effect of rabeprazole is headache. In clinical trials headache was assessed as possibly related to rabeprazole in 2.4% of subjects vs. 1.6% for placebo. Pantoprazole at a dose of 40 mg once a day is indicated for the short-term treatment (up to 8 weeks) in the healing and symptomatic relief of erosive esophagitis, and the maintenance of healing of erosive esophagitis and reduction in relapse rates of daytime and nighttime heartburn symptoms in patients with GERD. Other indications include pathological hypersecretory conditions including Zollinger-Ellison Syndrome. The most common side effects are headache and diarrhea.

Timeline

Start

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Primary completion

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Completion

2005-04

Publications

• Miner P, Delemos B, Xiang J, Lococo J, Ieni J. Effects of a single dose of rabeprazole 20 mg and pantoprazole 40 mg on 24-h intragastric acidity and oesophageal acid exposure: a randomized study in gastro-oesophageal reflux disease patients with a history of nocturnal heartburn. Aliment Pharmacol Ther. 2010 May;31(9):991-1000. doi: 10.1111/j.1365-2036.2010.04255.x. Epub 2010 Feb 2.

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Indications