title: 4-day lansoprazole quadruple therapy: a highly effective cure for Helicobacter pylori infection.
abstract: OBJECTIVE
  We have advocated quadruple therapy as the optimal therapy for cure of Helicobacter pylori infection. In this study, we investigated the efficacy and tolerability of 4-day therapy with lansoprazole, bismuth, tetracycline, and metronidazole.
  
  
  METHODS
  In a prospective open study, 51 consecutive patients, most of them with chronic peptic ulcer disease and biopsy proven H. pylori infection, received 4-day lansoprazole quadruple therapy after 3 days of lansoprazole pretreatment. Repeat endoscopy was performed 6 wk later, with antral and corpus biopsies for rapid urease test, histology, and culture. A patient was considered cured if three methodologies had negative results.
  
  
  RESULTS
  By intention-to-treat, 48 of 51 patients (94%) (95% CI 84%-99%) were cured; per protocol, 48 of 49 (98%) (95% CI 89%-100%) were cured. In 14 patients, the bacterial isolates were tested for metronidazole susceptibility: 12/12 with a sensitive strain were cured, as were 2/2 with a resistant strain. The regimen was well tolerated. Most side effects were mild, and none caused treatment to be stopped prematurely.
  
  
  CONCLUSIONS
  Four-day lansoprazole quadruple therapy achieves a very high cure rate in an unselected population of mainly ulcer patients. Furthermore, the regimen is short, can be used in patients allergic to penicillin, and is well tolerated, with no dropouts due to side effects. Presently, this regimen should be used only in patients with a metronidazole-sensitive pre-treatment bacterial isolate. When empiric treatment is used, 7-day quadruple therapy remains the therapy of choice, because it has well-documented efficacy against metronidazole-resistant strains. Further studies are needed to define the optimal treatment duration for quadruple therapy in patients with metronidazole-resistant strains.
authors.affiliation: Department of Internal Medicine, Sint Anna Hospital, Oss, The Netherlands.
authors.forename: W A
authors.initials: WA
authors.lastname: de Boer
authors.forename: R J
authors.initials: RJ
authors.lastname: van Etten
authors.forename: R W
authors.initials: RW
authors.lastname: Schade
authors.forename: M E
authors.initials: ME
authors.lastname: Ouwehand
authors.forename: P M
authors.initials: PM
authors.lastname: Schneeberger
authors.forename: G N
authors.initials: GN
authors.lastname: Tytgat
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents / Q000627:therapeutic use*; D001729:Bismuth / Q000627:therapeutic use; D004359:Drug Therapy, Combination; D004381:Duodenal Ulcer / Q000382:microbiology; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori; D006801:Humans; D064747:Lansoprazole; D008297:Male; D008795:Metronidazole / Q000627:therapeutic use; D008875:Middle Aged; D009853:Omeprazole / Q000031:analogs & derivatives* / Q000627:therapeutic use; D009942:Organometallic Compounds / Q000627:therapeutic use; D011292:Premedication; D011446:Prospective Studies; D054328:Proton Pump Inhibitors; D013752:Tetracycline / Q000627:therapeutic use; D013997:Time Factors
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D004791:Enzyme Inhibitors; D009942:Organometallic Compounds; D054328:Proton Pump Inhibitors; D064747:Lansoprazole; D008795:Metronidazole; D013752:Tetracycline; C002791:bismuth tripotassium dicitrate; D009853:Omeprazole; D001729:Bismuth