title: Enhanced eradication of Helicobacter pylori by pre- versus post-prandial amoxycillin suspension with omeprazole: implications for antibiotic delivery.
abstract: BACKGROUND
  Strategies to improve antibiotic treatment of Helicobacter pylori infection are hampered by lack of knowledge about the route of antibiotic delivery. Post-prandial dosing with antibiotics prolongs their gastric residence time and improves their intragastric distribution, leading to improved local delivery compared with pre-prandial dosing. We aimed to assess whether pre- or post-prandial dosing. with amoxycillin suspension was more effective for H. pylori eradication in an amoxycillin/omeprazole regimen.
  
  
  METHODS
  Seventy-nine patients with H. pylori infection were treated with omeprazole 40 mg o.m. for 28 days and amoxycillin suspension 500 mg q.d.s. for days 15-28, the amoxycillin being randomized to either 1 h before or immediately after food.
  
  
  RESULTS
  The H. pylori eradication rate, for those completing the trial, was 67% (22/33) when amoxycillin suspension was given pre-prandially, compared with 39% (15/38) when it was given post-prandially (P < 0.05). Good compliance was achieved, with H. pylori eradication in 59% (28/46) of good compliers compared with 36% (9/25) of others completing the protocol (P < 0.05).
  
  
  CONCLUSIONS
  When given with omeprazole, pre-prandial dosing with amoxycillin suspension is more effective for H. pylori eradication than post-prandial dosing. This is consistent with the hypothesis that systemic rather than local delivery of amoxycillin is important for H. pylori eradication.
authors.affiliation: Division of Gastroenterology, University Hospital, Queen's Medical Centre, Nottingham, UK.
authors.forename: J C
authors.initials: JC
authors.lastname: Atherton
authors.forename: D J
authors.initials: DJ
authors.lastname: Cullen
authors.forename: G E
authors.initials: GE
authors.lastname: Kirk
authors.forename: C J
authors.initials: CJ
authors.lastname: Hawkey
authors.forename: R C
authors.initials: RC
authors.lastname: Spiller
mesh_terms: D000328:Adult; D000658:Amoxicillin / Q000008:administration & dosage*; D000897:Anti-Ulcer Agents / Q000008:administration & dosage*; D004359:Drug Therapy, Combination; D004435:Eating; D005260:Female; D016481:Helicobacter Infections / Q000188:drug therapy*; D016480:Helicobacter pylori / Q000187:drug effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009853:Omeprazole / Q000008:administration & dosage*; D010406:Penicillins / Q000008:administration & dosage*
chemical_list: D000897:Anti-Ulcer Agents; D010406:Penicillins; D000658:Amoxicillin; D009853:Omeprazole