title: Seven-day triple therapy with lansoprazole, clarithromycin, and metronidazole for the cure of Helicobacter pylori infection: a short report.
abstract: BACKGROUND
  To refine our understanding of anti-Helicobacter pylori treatment regimens further, we evaluated the efficacy and safety of lansoprazole given in combination with clarithromycin and metronidazole for 7 days in an open-label, multicenter study.
  
  
  METHODS
  H. pylori-positive patients self-administered lansoprazole, 30 mg; clarithromycin, 500 mg; and metronidazole, 500 mg bid for 7 days. Patients were assessed at pretreatment, at which time the presence of H. pylori was documented by rapid urease test or histology and culture, following study drug administration (week 1) for a brief evaluation only, and at least 4 weeks posttreatment (week 5), including endoscopy with collection of biopsy specimens for culture and histology testing.
  
  
  RESULTS
  Of the 60 patients enrolled in the study, 59 had confirmed H. pylori infection, and 51 were included in an intent-to-treat analysis of efficacy. Primary metronidazole and clarithromycin resistance were observed in 84% and 8% of study patients, respectively. One month after the end of therapy, H. pylori infection was cured in 40 of 51 patients (78%); 95% confidence interval, (65%-89%). The triple-therapy regimen was well-tolerated, with only 2 patients (4%) requiring premature withdrawal from the study due to treatment-related adverse events. Taste perversion (15.0%) and diarrhea (11.7%) were the most frequently reported adverse events possibly or probably related to study medication during the treatment period.
  
  
  CONCLUSIONS
  Despite a high prevalence of metronidazole resistance, a 1-week, triple-drug combination of lansoprazole, clarithromycin, and metronidazole is effective treatment for and well-tolerated by patients with H. pylori infection.
authors.affiliation: South Florida Center for Digestive Diseases, Miami 33176, USA.
authors.forename: H
authors.initials: H
authors.lastname: Schwartz
authors.forename: R
authors.initials: R
authors.lastname: Krause
authors.forename: N
authors.initials: N
authors.lastname: Siepman
authors.forename: M
authors.initials: M
authors.lastname: Haber
authors.forename: A
authors.initials: A
authors.lastname: Weissfeld
authors.forename: S
authors.initials: S
authors.lastname: Kidd
authors.forename: P
authors.initials: P
authors.lastname: Rose
authors.forename: B
authors.initials: B
authors.lastname: Sahba
mesh_terms: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D000328:Adult; D000368:Aged; D017291:Clarithromycin / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D003967:Diarrhea / Q000139:chemically induced; D004334:Drug Administration Schedule; D004341:Drug Evaluation; D004352:Drug Resistance, Microbial; D004359:Drug Therapy, Combination / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D005260:Female; D005767:Gastrointestinal Diseases / Q000139:chemically induced; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects; D006801:Humans; D064747:Lansoprazole; D008297:Male; D008795:Metronidazole / Q000008:administration & dosage / Q000009:adverse effects / Q000627:therapeutic use*; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage / Q000009:adverse effects / Q000031:analogs & derivatives* / Q000627:therapeutic use; D012449:Safety; D013651:Taste Disorders / Q000139:chemically induced; D016896:Treatment Outcome
chemical_list: D053799:2-Pyridinylmethylsulfinylbenzimidazoles; D004791:Enzyme Inhibitors; D064747:Lansoprazole; D008795:Metronidazole; D017291:Clarithromycin; D009853:Omeprazole