title: Only four days of quadruple therapy can effectively cure Helicobacter pylori infection.
abstract: OBJECTIVE
  To determine whether 4 days of quadruple therapy using bismuth, tetracycline and metronidazole combined with omeprazole is effective treatment for Helicobacter pylori infection.
  
  
  METHODS
  Non-ulcer dyspepsia, as well as chronic peptic ulcer patients with biopsy-proven H. pylori infection received 4 days of quadruple therapy. They were pretreated with 3 days of omeprazole. At least 5-6 weeks later, endoscopy was repeated with 10 biopsies for urease test, histology and culture to establish cure of infection.
  
  
  RESULTS
  None of the 54 patients included was lost to follow-up but two had a 14C-urea breath test instead of endoscopy. Side-effects did not interfere with compliance. Forty-nine out of 54 patients (91%; 95% CI: 80-97%) were cured. Metronidazole susceptibility data were available from 43 pre-treatment isolates. Of these 38/40 (95%) with a metronidazole-sensitive strain, and one of three with a metronidazole-resistant strain were cured.
  
  
  CONCLUSIONS
  Four days of quadruple therapy after omeprazole pre-treatment is a feasible, well tolerated, and effective treatment for H. pylori infection, especially in those carrying a metronidazole-sensitive strain. It seems that in quadruple therapy, cure rate and treatment duration have a non-linear relation. Our results need confirmation, but for patients suffering from side-effects with the 7-day regimen stopping treatment after 4 days is justified.
authors.affiliation: Department of Internal Medicine, Sint Joseph Hospital, Veldhoven, Netherlands.
authors.forename: W A
authors.initials: WA
authors.lastname: De Boer
authors.forename: W M
authors.initials: WM
authors.lastname: Driessen
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000863:Antacids / Q000627:therapeutic use*; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D000897:Anti-Ulcer Agents / Q000627:therapeutic use*; D001729:Bismuth / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D004415:Dyspepsia / Q000188:drug therapy; D005260:Female; D005773:Gastroscopy; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D008297:Male; D008795:Metronidazole / Q000627:therapeutic use; D008875:Middle Aged; D009853:Omeprazole / Q000627:therapeutic use; D010437:Peptic Ulcer / Q000188:drug therapy*; D013752:Tetracycline / Q000627:therapeutic use
chemical_list: D000863:Antacids; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D008795:Metronidazole; D013752:Tetracycline; D009853:Omeprazole; D001729:Bismuth