The Efficacy of 10-day and 14-day Bismuth-based Quadruple Therapy in First-line H. Pylori Eradication

Bismuth Subcitrate (120 MG Oral Tablet) 1 tab per oral four times per day for 14 days in the14-day bismuth-based quadruple therapy and for 10 days in the10-day bismuth-based quadruple therapy

"The probiotic powder per oral twice daily for 24 weeks. The probiotic powder is named as President AB powder, which contains an approximately equal mixture of Lactobacillus acidophilus and Bifidobacterium lactis Bb12 at a concentration of \>= 10E9 CFU/mL (President Corp., Tainan, Taiwan)."

Esomeprazole (40 mg) 1 tab per oral twice per day for 14 days in the14-day bismuth-based quadruple therapy and for 10 days in the10-day bismuth-based quadruple therapy

Metronidazole (250 MG) 2 tab per oral thrice per day for 14 days in the14-day bismuth-based quadruple therapy and for 10 days in the10-day bismuth-based quadruple therapy

Tetracycline (250 MG) 2 tab per oral four times per day for 14 days in the14-day bismuth-based quadruple therapy and for 10 days in the10-day bismuth-based quadruple therapy