We decided to compare a routine regimen with a sequential one. This study is the third phase of a double blind clinical trial, which would be done in a 6 months period during the year of 1396. 344 persons were chosen random block in a specific time period from the people referred to the endoscopy department, which had a positive helicobacter pylori endoscopic report. They were divided into two 172 groups, one group treated with the 14 days regimen of “bismuthe subcirate 240 mg twice a day made by Kimidarou, pantoprazole 20 mg twice a day made by Takeda, amoxicilline 1 gr twice a day made by Kosar, clarithromycin 500 mg twice a day made by Actover , and the sequential regimen; first 7 days of bismuthe subcirate 240 mg twice a day made by Kimidarou, pantoprazole 20 mg twice a day made by Takeda, amoxicilline 1 gr twice a day made by Kosar, meteronidazole 500 mg twice a day made by abidi, and second 7 days with bismuthe subcirate 240 mg twice a day made by Kimidarou, pantoprazole 20 mg twice a day made by Takeda, amoxicilline 1 gr twice a day made by Kosar, and furazolidone 100 mg twice a day made by Tehran Darou). An UBT with carbon 14 would be done 4 weeks after the end of the treatment to find out the efficacy of the therapeutic regimens. In addition, we would evaluate the side effects 2 weeks after the initiation of the treatment.