title: The efficacy and safety of one-week triple therapy with lansoprazole, clarithromycin, and metronidazole for the treatment of Helicobacter pylori infection in Japanese patients.
abstract: BACKGROUND
  The aim of this study was to evaluate the efficacy and tolerability of 1-week, low-dose triple therapy with lansoprazole, clarithromycin, and metronidazole (LCM) for the cure of H. pylori infection and to establish the adequate dosage of a new triple therapy for Japanese patients.
  
  
  METHODS
  One hundred four H. pylori-positive Japanese patients were assigned alternatively to one of two groups: one to receive either 30 mg lansoprazole once in the morning, 200 mg clarithromycin twice daily, and 250 mg metronidazole twice daily for 1 week (LCM1; n = 52); the other to receive 30 mg lansoprazole once in the morning, 200 mg clarithromycin twice daily, and 500 mg metronidazole twice daily for 1 week (LCM2; n = 52). H. pylori infection was assessed by smear, culture, and histological assessment (Giemsa stain) performed before and 4 weeks after cessation of the therapy.
  
  
  RESULTS
  The overall cure rates of H. pylori infection were 92.3% (48 of 52; 95% confidence interval (CI), 85% to 100%) in LCM1 and 92.3% (48 of 52; 95% CI, 85% to 100%) in LCM2. The cure rates in the patients without prior treatment were 95.7% (44 of 46; 95% CI, 89%-100%) in LCM1 and 95.7% (45 of 47; 95% CI, 89%-100%) in LCM2. Minor side effects were observed in 7.7% of LCM1 and 9.6% of LCM2, respectively.
  
  
  CONCLUSIONS
  The LCM1 regimen consisting of 30 mg lansoprazole once daily, 200 mg clarithromycin twice daily, and 250 mg metronidazole twice daily (the regular doses in ordinary use in Japan) is a highly effective and safe regimen for Japanese patients. LCM1 as a new triple therapy is a promising regimen for the first-line treatment of H. pylori infection in Japanese patients.
authors.affiliation: Department of Gastroenterology, Jichi Medical School, Tochigi, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Takimoto
authors.forename: K
authors.initials: K
authors.lastname: Satoh
authors.forename: Y
authors.initials: Y
authors.lastname: Taniguchi
authors.forename: K
authors.initials: K
authors.lastname: Saifuku
authors.forename: K
authors.initials: K
authors.lastname: Kihira
authors.forename: M
authors.initials: M
authors.lastname: Seki
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshida
authors.forename: K
authors.initials: K
authors.lastname: Ido
authors.forename: K
authors.initials: K
authors.lastname: Kimura
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D000368:Aged; D000900:Anti-Bacterial Agents / Q000008:administration & dosage*; D000897:Anti-Ulcer Agents / Q000008:administration & dosage*; D017291:Clarithromycin / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D007564:Japan; D064747:Lansoprazole; D008297:Male; D008795:Metronidazole / Q000008:administration & dosage*; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage / Q000031:analogs & derivatives*
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D064747:Lansoprazole; D008795:Metronidazole; D017291:Clarithromycin; D009853:Omeprazole