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Increased risk for Helicobacter pylori recurrence by continuous acid suppression: a randomized controlled study
G Manes1, J E Domínguez-Muñoz, G Uomo
1Dipartimento di Gastroenterologia, Ospedale Cardarelli, Napoli, Italy.
Italian Journal of Gastroenterology and Hepatology
|June 6, 1998
Summary
Maintenance therapy with ranitidine after curing Helicobacter pylori infection significantly increases the risk of infection recurrence. Gastric acid plays a key role in preventing H. pylori recurrence.
Area of Science:
- Gastroenterology
- Infectious Diseases
- Pharmacology
Background:
- Acid hyposecretion can promote Helicobacter pylori colonization.
- Helicobacter pylori infection is a common cause of duodenal ulcers.
- Eradication of H. pylori is a standard treatment for duodenal ulcers.
Purpose of the Study:
- To investigate if ranitidine maintenance therapy after H. pylori cure increases infection recurrence.
- To determine the role of gastric acid in H. pylori recurrence prevention.
Main Methods:
- Sixty-six patients with cured H. pylori infection and duodenal ulcers were randomized.
- Group A received 12 months of ranitidine (150 mg daily); Group B received no treatment.
- Follow-up included clinical, endoscopic, and histological assessments every 4 months.
Main Results:
- H. pylori recurrence occurred in 30% of patients on ranitidine versus 7% in the control group (p < 0.05).
- Duodenal ulcer recurrence was infrequent and associated with H. pylori reinfection.
- Corpus-predominant gastritis was noted in reinfected patients receiving ranitidine.
Conclusions:
- Long-term gastric acid suppression post-H. pylori eradication elevates the risk of reinfection.
- Gastric acid influences H. pylori localization and is crucial for preventing recurrence.