title: Rank order of success favors longer duration of imidazole-based therapy for Helicobacter pylori in duodenal ulcer disease: a randomized pilot study.
abstract: BACKGROUND
  Studies on eradication therapy in developing countries have shown a success rate of 70-85%, which is suboptimal. Duration of therapy may be an important factor dictating eradication success in such regions.
  
  
  OBJECTIVE
  The study was undertaken to evaluate the effect of increasing the treatment period on eradication of Helicobacter pylori in duodenal ulcer disease.
  
  
  METHODS
  A randomized trial was carried out in which 64 consecutive H. pylori-infected patients with duodenal ulcer disease were enrolled. The patients were randomized to one of the three trial arms. Therapy consisted of lansoprazole 30 mg twice a day (b.i.d.), amoxycillin 1 g b.i.d. and tinidazole 500 mg b.i.d. The treatment period was 1 week in group I, 2 weeks in group II and 3 weeks in group III. At inclusion, patients underwent endoscopy and the presence of H. pylori was documented by a positive urease test and C14 urea breath test. Four weeks after completion of eradication therapy, the patients were subjected to repeat endoscopy to assess ulcer healing and tests for H. pylori infection.
  
  
  RESULTS
  Sixty-four patients (55 male and nine female; mean age 35.5 years) were enrolled in each group. The H. pylori eradication rate for group I (1 week of therapy) was 47.6%, that for group II (2 weeks of therapy) was 80%, and that for group III (3 weeks of therapy) was 91.3% (p =.003). The ulcer healing rates were 71.4, 80 and 95.6% in groups I, II and III, respectively (p =.09).
  
  
  CONCLUSIONS
  The 3-week regimen significantly improved the eradication rate as compared with the 1-week regime. Increasing the duration of therapy significantly improved the chances of eradication of H. pylori in duodenal ulcer disease.
authors.affiliation: Department of Gastroenterology, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Ashmit
authors.initials: A
authors.lastname: Chaudhary
authors.forename: Vineet
authors.initials: V
authors.lastname: Ahuja
authors.forename: Chandrasekhar S
authors.initials: CS
authors.lastname: Bal
authors.forename: Bimal
authors.initials: B
authors.lastname: Das
authors.forename: Ravinder Mohan
authors.initials: RM
authors.lastname: Pandey
authors.forename: Mahesh Prakash
authors.initials: MP
authors.lastname: Sharma
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000293:Adolescent; D000328:Adult; D000368:Aged; D000658:Amoxicillin / Q000008:administration & dosage / Q000627:therapeutic use; D000900:Anti-Bacterial Agents / Q000008:administration & dosage* / Q000627:therapeutic use; D000897:Anti-Ulcer Agents / Q000008:administration & dosage / Q000627:therapeutic use; D001944:Breath Tests; D004359:Drug Therapy, Combination; D004381:Duodenal Ulcer / Q000188:drug therapy* / Q000382:microbiology*; D016099:Endoscopy, Gastrointestinal; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy* / Q000382:microbiology; D016480:Helicobacter pylori / Q000187:drug effects*; D006801:Humans; D007093:Imidazoles / Q000008:administration & dosage* / Q000009:adverse effects / Q000627:therapeutic use; D064747:Lansoprazole; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D010865:Pilot Projects; D011446:Prospective Studies; D013997:Time Factors; D014011:Tinidazole / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use; D014508:Urea / Q000032:analysis
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000900:Anti-Bacterial Agents; D000897:Anti-Ulcer Agents; D007093:Imidazoles; D014011:Tinidazole; D064747:Lansoprazole; D000658:Amoxicillin; D014508:Urea; D009853:Omeprazole