Abstract: A method is disclosed for preventing the recurrence of duodenal ulcer associated with Campylobacter pylori (Helicobacter pylori) infection in a patient suffering from duodenal ulcer disease associated with Campylobacter pylori infection by administering a pharmaceutically acceptable bismuth compound, a first antibiotic selected from the group consisting of tetracycline and penicillins, and a second antibiotic which is metronidazole.