title: [Circadian aspects of acetylsalicylic acid induced injury and protective effect of ranitidine on the the upper gastrointestinal tract].
abstract: Circadian Aspects of Acetylsalicylic Acid Induced Injury and Protective Effect of Ranitidine on the Upper Gastrointestinal Tract. In a randomised parallel double-blind study the gastric and duodenal effects of 300 mg acetylsalicylic acid (ASA, CAS 50-78-2) daily in the presence and absence of 150 mg ranitidine (Zantic, CAS 66357-35-5) daily was evaluated in 32 healthy volunteers undergoing upper gastrointestinal endoscopy. Drugs were taken over a period of 7 days either at 8 a.m. (n = 16) or at 8 p.m. (n = 16). Endoscopic controls were performed at entry and repeated after 7 days of treatment. At entry both groups showed comparable mucosal damages: 8 a.m. group: ASA/placebo 0.8 +/- 0.1 (stomach) and 0.1 +/- 0.1 (duodenum): ASA/ranitidine 1.0 +/- 0.0 (stomach) and 0.07 +/- 0.06 (duodenum). 8 p.m. group: ASA/placebo 0.9 +/- 0.06 (stomach) and 0.1 +/- 0.09 (duodenum). ASA/ranitidine 0.8 +/- 0.08 (stomach) and 0.07 +/- 0.06 (duodenum). After 7 days of treatment the lesions score increased in the ASA/Placebo group in the 8 a.m. group to 9.1 +/- 1.1 (stomach) and 2.7 +/- 1.0 (duodenum), and in the 8 p.m. group to 10.9 +/- 1.1 (stomach) and to 3.9 +/- 0.9 duodenum). The corresponding values in the ASA/ranitidine group were 2.6 +/- 0.8 (stomach) and 0.2 +/- 0.08 (duodenum) (8 a.m.) and 4.8 +/- 0.8 (stomach) and 0.3 +/- 0.1 (duodenum) (8 p.m.). There was no statistical difference between the morning- and the evening dose of ASA. In addition, ranitidine protection was also time-independent.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Krankenhaus Salem, Heidelberg.
authors.forename: P
authors.initials: P
authors.lastname: Müller
authors.forename: L
authors.initials: L
authors.lastname: Arce
authors.forename: P
authors.initials: P
authors.lastname: Jackisch
authors.forename: B
authors.initials: B
authors.lastname: Simon
mesh_terms: D000328:Adult; D001241:Aspirin / Q000009:adverse effects*; D002940:Circadian Rhythm / Q000502:physiology*; D004311:Double-Blind Method; D005753:Gastric Mucosa / Q000473:pathology; D005767:Gastrointestinal Diseases / Q000139:chemically induced* / Q000473:pathology / Q000517:prevention & control*; D006801:Humans; D007413:Intestinal Mucosa / Q000473:pathology; D011899:Ranitidine / Q000627:therapeutic use*
chemical_list: D011899:Ranitidine; D001241:Aspirin
vernacular_title: Zirkadiane Aspekte einer Schädigung durch Acetylsalicylsäure und Schutzwirkung durch Ranitidin am oberen Gastrointestinaltrakt.