title: The influence of feeding on gastric acid suppression in Helicobacter pylori-positive patients treated with a proton pump inhibitor or an H2-receptor antagonist after bleeding from a gastric ulcer.
abstract: BACKGROUND
  This study investigated the influence of feeding on gastric acid suppression in Helicobacter pylori-positive patients treated with intravenous infusions of proton pump inhibitors (PPIs) or with H2-receptor antagonists (H2-RAs) after bleeding from a gastric ulcer.
  
  
  METHODS
  Forty-nine H. pylori-positive patients with bleeding gastric ulcers (44 men and 5 women) were divided into four groups: one group received an H2-RA while fasting, one group received an H2-RA while eating regularly, one group received a PPI while fasting, and one group received a PPI while eating regularly. Intragastric pH was monitored during fasting and nonfasting to calculate the pH 3 and pH 4 holding times and the mean pH.
  
  
  RESULTS
  During a 24-h fast, the pH 3 and pH 4 holding times and the mean pH were significantly higher in patients administered omeprazole (PPI; 93.2 +/- 9.2%, 90.6 +/- 11.1%, and 6.9 +/- 0.6, respectively) than in those administered ranitidine (H2-RA; 61.0 +/- 27.5%, 55.8 +/- 29.1%, and 4.8 +/- 1.3, respectively; P<0.001 for all). Results were similar during feeding (PPI meal, 98.9 +/- 2.6%, 98.3 +/- 3.7%, and 6.9 +/- 0.3; H2-RA meal, 59.8 +/- 17.6%, 49.7 +/- 18.0%, and 4.3 +/- 0.7, respectively; P<0.001 for all). In addition, the pH 3 and pH 4 holding times and the mean pH in the H2-RA meal group were not significantly lower than those in the H2-RA group (P=0.999, P=0.865, and P=0.687, respectively). The values in the PPI and PPI meal groups were similar (P=0.872, P=0.777, and P>0.999, respectively).
  
  
  CONCLUSIONS
  Gastric acid suppression during the administration of an H2-RA or a PPI soon after the cessation of gastric bleeding was scarcely affected by feeding. It may well be that H. pylori-positive patients with bleeding gastric ulcer can resume a regular diet and return to work soon after bleeding ceases.
authors.affiliation: Second Department of Internal Medicine, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8666, Japan.
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Ozawa
authors.forename: Nozomi
authors.initials: N
authors.lastname: Yoshikawa
authors.forename: Takashige
authors.initials: T
authors.lastname: Tomita
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Akita
authors.forename: Keiji
authors.initials: K
authors.lastname: Mitamura
mesh_terms: D000328:Adult; D000368:Aged; D004435:Eating / Q000502:physiology*; D005215:Fasting / Q000502:physiology; D005260:Female; D005744:Gastric Acid / Q000378:metabolism*; D016480:Helicobacter pylori; D006635:Histamine H2 Antagonists / Q000008:administration & dosage*; D006801:Humans; D007262:Infusions, Intravenous; D008297:Male; D008875:Middle Aged; D010438:Peptic Ulcer Hemorrhage / Q000382:microbiology / Q000503:physiopathology* / Q000628:therapy; D054328:Proton Pump Inhibitors; D017494:Proton Pumps / Q000008:administration & dosage*; D013276:Stomach Ulcer / Q000150:complications / Q000503:physiopathology
chemical_list: D006635:Histamine H2 Antagonists; D054328:Proton Pump Inhibitors; D017494:Proton Pumps