The modified sequential therapy groups received 20 mg rabeprazole and 1g amoxicillin , twice daily for the first 5 days , followed by Rabeprazole 20mg-bid , bismuth subcitrate ( 120 mg-qid ) , Tetracycline 500 mg-qid , Metronidazole 500 mg-tid for the remaining 5 ( 10 day sequential therapy group-10S ) ( 42 patients ) , 7 ( 12 day sequential therapy group-12S ) ( 42 patients ) and 9 ( 14 day sequential therapy group-14S ) ( 41 patients ) days .