Patients infected with H. pylori resistant to both metronidazole and clarithromycin ( n = 145 ) were randomized to either esomeprazole 20 mg , rifabutin 150 mg and amoxicillin 1 g , each given b.d. for 7 days ( ERA ) , or to omeprazole 40 mg and amoxicillin 1000 mg , each given t.d.s. for 14 days ( OA ) .
