H. pylori test and treat in case of unexplained ... b.i.d.) Clarithromycin (500 mg b.i.d.) Amoxicillin (1000 mg b.i.d.) or metronidazole (400 mg b.i.d.) 7–14 In populations with less than ...

Despite use of the currently most effective treatment regimens, approximately 10% to 20% of patients will fail to achieve eradication of their infection, and thus will remain H pylori positive.