title: Low-dose lansoprazole and clarithromycin plus metronidazole vs. full-dose lansoprazole and clarithromycin plus amoxicillin for eradication of Helicobacter pylori infection.
abstract: OBJECTIVE
  To compare, in a randomized controlled trial, the efficacy and tolerability of two 1-week triple therapies for Helicobacter pylori eradication.
  
  
  METHODS
  One hundred and thirty-four consecutive patients with non-ulcer dyspepsia and H. pylori infection were randomized to receive lansoprazole 30 mg once daily, clarithromycin 250 mg twice daily, and metronidazole 500 mg twice daily (LCM group), or lansoprazole 30 mg twice daily, clarithromycin 500 mg twice daily, and amoxicillin 1000 mg twice daily (LCA group). H. pylori status was assessed by rapid urease test, histology and 13C-urea breath test before and after therapy.
  
  
  RESULTS
  At 3 months, H. pylori eradication (intention- to-treat/per protocol analysis) was 92.4%/93.8% in the LCM group and 83.1%/85.7% in the LCA group (P=N.S.). Side-effects were more frequently reported in the LCA group (37.9%) than in the LCM group (19.7%) (P < 0.05).
  
  
  CONCLUSIONS
  In this open, randomized controlled trial, eradication of H. pylori by low-dose lansoprazole and clarithromycin plus metronidazole was higher with significantly less side-effects than by full-dose lansoprazole and clarithromycin plus amoxicillin. This finding may be related to the stronger synergism of clarithromycin plus metronidazole, even at lower doses, than of clarithromycin plus amoxicillin. Considering the lower cost as well, LCM should be preferred to LCA in the eradication of H. pylori.
authors.affiliation: Dipartimento di Medicina Interna e Gastroenterologia, Università degli Studi di Bologna, Italy. bazzoli@alma.unibo.it
authors.forename: F
authors.initials: F
authors.lastname: Bazzoli
authors.forename: R M
authors.initials: RM
authors.lastname: Zagari
authors.forename: P
authors.initials: P
authors.lastname: Pozzato
authors.forename: S
authors.initials: S
authors.lastname: Fossi
authors.forename: L
authors.initials: L
authors.lastname: Ricciardiello
authors.forename: G
authors.initials: G
authors.lastname: Nicolini
authors.forename: L
authors.initials: L
authors.lastname: De Luca
authors.forename: D
authors.initials: D
authors.lastname: Berretti
authors.forename: G
authors.initials: G
authors.lastname: Alampi
authors.forename: C
authors.initials: C
authors.lastname: Di Pietro
authors.forename: P
authors.initials: P
authors.lastname: Morelli
authors.forename: E
authors.initials: E
authors.lastname: Roda
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000284:Administration, Oral; D000328:Adult; D000368:Aged; D000658:Amoxicillin / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D000900:Anti-Bacterial Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D000897:Anti-Ulcer Agents / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D017291:Clarithromycin / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D016527:Drug Costs; D004359:Drug Therapy, Combination; D004415:Dyspepsia / Q000209:etiology; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects / Q000472:pathogenicity; D006801:Humans; D064747:Lansoprazole; D008297:Male; D008795:Metronidazole / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000494:pharmacology*; D010406:Penicillins / Q000008:administration & dosage / Q000009:adverse effects / Q000494:pharmacology*; D016896:Treatment Outcome
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D010406:Penicillins; D064747:Lansoprazole; D008795:Metronidazole; D000658:Amoxicillin; D017291:Clarithromycin; D009853:Omeprazole