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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Research in experimental medicine 178 (1981), S. 151-154 
    ISSN: 1433-8580
    Keywords: Gastric acid secretion ; H2-receptor antagonists ; Pentagastrin ; Ranitidine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The antisecretory effects of a new histamine H2-receptor antagonist, ranitidine hydrochloride, have been investigated on basal and pentagastrinstimulated acid secretion in healthy volunteers 5 and 10 h after oral administration of 150 mg. In addition, the 24-h intragastric pH-profiles have been measured in patients undergoing parenteral nutrition after three doses of 150 mg ranitidine per day. A 40% inhibition of basal acid output has been noted even 10 h after drug intake. The intragastric pH-values were raised above 5 for at least 24h. The new H2-antagonist ranitidine has been proven to be a potent and longacting antisecretory compound.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1435-2451
    Keywords: H2-Blockers ; Cimetidine, ranitidine ; Stress ulcer ; Intensive care patients ; Antacids ; Gastric acid secretion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung In einer multizentrisch durchgeführten prospektiven Einfachblind-Studie wurde die Wirksamkeit des H2-Blockers Ranitidin mit der von Cimetidin in der Prophylaxe streßbedingter Blutungen aus dem oberen Gastrointestinaltrakt verglichen. An dieser Studie nahmen insgesamt 380 Patienten teil. In randomisierter Anordnung erhielten 192 Patienten 4 × 50 mg Ranitidin i.v. bzw. 2 × 150 mg oral. 180 Patienten wurde 4 × 400 mg Cimetidin i.v. bzw: 1000 mg oral verabreicht. 5 Patienten unter Ranitidin (2,6%) und 12 Patienten unter Cimetidin (6,4 %) entwickelten eine obere gastrointestinale Blutung, die eindeutig oder möglicherweise auf Streßläsionen zurückzuführen war. Dieser Unterschied war nicht statistisch signifikant. Streßläsionen konnten bei 11,8 % in der Ranitidin- und bei 18,3 % in der Cimetidin-Gruppe endoskopisch nachgewiesen werden (nicht signifikant). Unter Ranitidin wurden Übelkeit, Erbrechen und Tachykardie (n = 4) und unter Cimetidin Cholestase und zentralnervöse Symptome (n = 10) registriert. Ranitidin ist somit in der Prophylaxe der Streßulcus-Blutung vergleichbar wirksam wie Cimetidin.
    Notes: Summary In a multicentre single-blind study, ranitidine was compared to cimetidine as prophylactic treatment against stress-induced upper gastrointestinal bleeding in seriously ill patients in the intensive care unit (ICU). 380 patients entered the study. 192 patients were treated with ranitidine 50 mg q.i.d. as i.v. bolus followed by 150mg orally twice daily. 188 patients received cimetidine 400 mg q.i.d. intravenously and 1,000 mg daily orally in divided doses. Five patients in the ranitidine group (2.6%) and 12 in the cimetidine group (6.4%) developed gastrointestinal bleeding definitely or possibly due to stress lesions. This difference was not significant. The incidence of stress erosions or ulcerations developing during the study was 11.8 % for the ranitidine group and 18.3% for the cimetidine group (non-significant difference). Adverse events in the ranitidine group were nausea, tachycardia or vomiting in 4 patients. 5 cimetidine-treated patients developed cholestasis, and 5 additional central nervous system problems. The high degree of efficacy of both drugs compared very favourably with the high incidence of stress ulceration and hemorrhage in similar untreated populations.
    Type of Medium: Electronic Resource
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