title: Early absorption of enteral ranitidine after major laparotomy.
abstract: Thirty-six patients were studied following abdominal aortic surgery to determine if a commonly used medication could be absorbed from the gastrointestinal (GI) tract in the early postoperative period. Patients were randomized into two groups: Group I received ranitidine elixir 3 mg/kg via nasogastric tube every 12 hours; Group II received intravenous (IV) ranitidine 1 mg/kg every 8 hours. Ranitidine serum levels were measured with high performance liquid chromatography 1 hour after administration of the first three doses. Gastric pH was measured every 4 hours. It was found that serum ranitidine levels generally regarded as clinically effective were achieved in both groups. Although the levels were significantly higher following intravenous (IV) administration (Group II), there were no differences in average gastric pH. The authors conclude that within 24 hours of aortic surgery enterally administered ranitidine is effectively absorbed and provides prophylaxis equivalent to IV administration of the drug at lower cost. Other medications might be deliverable via the GI tract in the early postoperative period.
authors.affiliation: Department of Surgery, Cedars-Sinai Medical Center, Los Angeles, CA 90048.
authors.forename: D A
authors.initials: DA
authors.lastname: Kulber
authors.forename: L
authors.initials: L
authors.lastname: Bentt
authors.forename: E
authors.initials: E
authors.lastname: Repique
authors.forename: S B
authors.initials: SB
authors.lastname: Dubin
authors.forename: M
authors.initials: M
authors.lastname: Wittman
authors.forename: R
authors.initials: R
authors.lastname: Treiman
authors.forename: M M
authors.initials: MM
authors.lastname: Shabot
mesh_terms: D000284:Administration, Oral; D000368:Aged; D001012:Aorta, Abdominal / Q000601:surgery; D001018:Aortic Diseases / Q000601:surgery*; D005260:Female; D005745:Gastric Acidity Determination; D005753:Gastric Mucosa / Q000378:metabolism; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007275:Injections, Intravenous; D007408:Intestinal Absorption; D007441:Intubation, Gastrointestinal; D007813:Laparotomy; D008297:Male; D011446:Prospective Studies; D011899:Ranitidine / Q000008:administration & dosage / Q000097:blood / Q000493:pharmacokinetics*
chemical_list: D011899:Ranitidine