title: Eradication rates of clarithromycin-resistant Helicobacter pylori using either rabeprazole or lansoprazole plus amoxicillin and clarithromycin.
abstract: BACKGROUND
  The resistance of Helicobacter pylori to clarithromycin has become one of the primary reasons for eradication failure.
  
  
  OBJECTIVE
  To compare the eradication rates of triple therapy using amoxicillin (A), clarithromycin (C) and rabeprazole (R) or lansoprazole (L) against clarithromycin-sensitive and clarithromycin-resistant strains.
  
  
  METHODS
  Two hundred and ninety-five patients were randomly divided into four groups and treated for 1 week: 147 cases were treated with RAC, i.e. 49 cases with R20C400 (10 mg R + 750 mg A + 200 mg C, twice daily), 48 cases with R40C400 (20 mg R + 750 mg A + 200 mg C, twice daily) and 50 cases with R40C800 (20 mg R + 750 mg A + 400 mg C, twice daily); 148 cases with treated with LAC (30 mg L + 750 mg A + 200 mg C, twice daily).
  
  
  RESULTS
  According to intention-to-treat and per protocol analyses, the eradication rates were 88% and 91% with RAC and 78% and 81% with LAC; the eradication rates with R20C400, R40C400 and R40C800 were 94%, 81% and 86%, respectively, in the intention-to-treat analysis. In addition, the eradication rates for clarithromycin-sensitive strains with RAC and LAC were 98% and 89%, respectively, and for clarithromycin-resistant strains with RAC and LAC were 8.1% and 0%, respectively.
  
  
  CONCLUSIONS
  The eradication rate was significantly higher with RAC than LAC. The eradication rate for clarithromycin-resistant strains was low in both groups, and an improved eradication rate could not be achieved by changing the dose of clarithromycin or proton pump inhibitor.
authors.affiliation: Second Department of Internal Medicine, Oita Medical University, Oita, Japan. murakam@oita-med.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Murakami
authors.forename: R
authors.initials: R
authors.lastname: Sato
authors.forename: T
authors.initials: T
authors.lastname: Okimoto
authors.forename: M
authors.initials: M
authors.lastname: Nasu
authors.forename: T
authors.initials: T
authors.lastname: Fujioka
authors.forename: M
authors.initials: M
authors.lastname: Kodama
authors.forename: J
authors.initials: J
authors.lastname: Kagawa
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: H
authors.initials: H
authors.lastname: Abe
authors.forename: T
authors.initials: T
authors.lastname: Arita
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D000658:Amoxicillin / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D000897:Anti-Ulcer Agents / Q000627:therapeutic use; D001562:Benzimidazoles / Q000627:therapeutic use*; D017291:Clarithromycin / Q000627:therapeutic use; D024881:Drug Resistance, Bacterial; D004359:Drug Therapy, Combination / Q000627:therapeutic use; D004381:Duodenal Ulcer / Q000382:microbiology; D005260:Female; D005756:Gastritis / Q000382:microbiology; D016481:Helicobacter Infections / Q000150:complications / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D064747:Lansoprazole; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000031:analogs & derivatives* / Q000627:therapeutic use*; D054328:Proton Pump Inhibitors; D064750:Rabeprazole; D013276:Stomach Ulcer / Q000382:microbiology
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D001562:Benzimidazoles; D054328:Proton Pump Inhibitors; D064747:Lansoprazole; D064750:Rabeprazole; D000658:Amoxicillin; D017291:Clarithromycin; D009853:Omeprazole