Results of previous anti-H pylori regimens in spontaneous duodenal ulcer
| Drugs | Duration (weeks) | No treated | UBT negative |
| Bismuth | 2 | 101 | 83 (82%) |
| Tetracycline | 2 | ||
| Metronidazole | 2 | ||
| Lansoprazole | 4 | 104 | 92 (88%) |
| Amoxycillin, metronidazole | 1 | ||
| Lansoprazole | 4 | 112 | 104 (93%) |
| Clarithromycin, tinidazole | 1 | ||
| Lansoprazole | 4 | 74 | 69 (93%) |
| Tetracycline 250 mg twice a day | 1 | ||
| Clarithromycin, metronidazole | 1 |









