Comparison of Hybrid and Bismuth Quadruple Therapies for Helicobacter Pylori Eradication

pantoprazole 40 mg bid for 14 days, bismuth subcitrate 120 mg qid for 14 days, tetracycline 500 mg qid for 14 days, metronidazole 250 mg qid for 14 days

(pantoprazole 40 mg bid for 7 days, amoxicillin 1 g bid for 7 days) followed by (pantoprazole 40 mg bid for 7 days, amoxicillin 1 g bid for 7 days, clarithromycin 500 mg bid for 7 days, and metronidazole 500 mg bid for 7 days)