title: Quadruple therapy compared with dual therapy for eradication of Helicobacter pylori in ulcer patients: results of a randomized prospective single-centre study.
abstract: OBJECTIVE
  To assess the efficacy and side-effect profile of two currently advocated treatment regimens for eradicating Helicobacter pylori.
  
  
  METHODS
  A randomized, controlled, open, single-centre study.
  
  
  METHODS
  A community hospital in The Netherlands.
  
  
  METHODS
  Seventy-six consecutive patients with (chronic) ulcer disease and biopsy-proven H. pylori infection, but without active ulceration at the time of inclusion.
  
  
  METHODS
  Patients were randomly allocated to 1 week of quadruple therapy with omeprazole, bismuth, tetracycline and metronidazole (group 1) or 2 weeks of dual therapy with omeprazole and amoxicillin (group 2). Group 1 patients were pretreated with omeprazole for 3 days.
  
  
  METHODS
  Cure was confirmed by obtaining 10 endoscopic biopsies for urease testing, histology and culture 6 weeks after treatment. Side-effects were scored on a standard questionnaire.
  
  
  RESULTS
  Three patients were lost to follow-up. In the 'intention to treat' analysis 37 (92.5%) of 40 patients in group 1 were cured compared with 20 (55.6%) of 36 patients in group 2 (P < 0.001). The difference in efficacy was 36.9% (95% confidence interval 18.7-55.1%). Side-effects were fewer and milder in group 2, but all patients in both groups were able to complete the course of treatment.
  
  
  CONCLUSIONS
  Dual therapy is significantly less effective in curing H. pylori infection in peptic ulcer patients than quadruple therapy. No patients were intolerant to either treatment. On the basis of the low efficacy of dual therapy, we believe that this therapy should not be used as a first-line treatment strategy. We confirmed our previous finding that 1 week of quadruple therapy is tolerated well and that it is highly effective against metronidazole-sensitive as well as metronidazole-resistant strains of H. pylori.
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: A R
authors.initials: AR
authors.lastname: Jansz
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000658:Amoxicillin / Q000009:adverse effects / Q000627:therapeutic use; D000863:Antacids / Q000009:adverse effects / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000009:adverse effects / Q000627:therapeutic use; D000897:Anti-Ulcer Agents / Q000009:adverse effects / Q000627:therapeutic use*; D000994:Antitrichomonal Agents / Q000009:adverse effects / Q000627:therapeutic use; D001729:Bismuth / Q000009:adverse effects / Q000627:therapeutic use; D004359:Drug Therapy, Combination / Q000009:adverse effects / Q000627:therapeutic use*; D016145:Endoscopy, Digestive System; D005260:Female; D005500:Follow-Up Studies; D016481:Helicobacter Infections / Q000188:drug therapy* / Q000209:etiology / Q000473:pathology; D016480:Helicobacter pylori / Q000187:drug effects / Q000302:isolation & purification; D006801:Humans; D008297:Male; D008795:Metronidazole / Q000009:adverse effects / Q000627:therapeutic use; D008875:Middle Aged; D009853:Omeprazole / Q000009:adverse effects / Q000627:therapeutic use; D010406:Penicillins / Q000009:adverse effects / Q000627:therapeutic use; D010437:Peptic Ulcer / Q000188:drug therapy* / Q000382:microbiology / Q000473:pathology; D011446:Prospective Studies; D013752:Tetracycline / Q000009:adverse effects / Q000627:therapeutic use
chemical_list: D000863:Antacids; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D000994:Antitrichomonal Agents; D010406:Penicillins; D008795:Metronidazole; D000658:Amoxicillin; D013752:Tetracycline; D009853:Omeprazole; D001729:Bismuth