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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 39 (1990), S. 515-517 
    ISSN: 1432-1041
    Keywords: ranitidine ; mifentidine duodenal ulcer ; short-term ulcer treatment ; healing rate ; adverse effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The efficacy and safety of mifentidine 20 mg at night, a new, potent, long-acting H2-receptor antagonist, has been compared with ranitidine 300 mg at night in 60 patients with acute duodenal ulcer, in a randomized double-blind study. Antacid tablets were allowed as additional treatment for pain relief. The treatment lasted for 4 weeks. After 4 weeks of treatment the healing rate was similar; amongst the patients who completed the treatment, healing was 68% for mifentidine, 63% for ranitidine, and on intention-to-treat analysis, healing in both groups was 63%. Pain relief and antacid consumption were similar in both groups. Clinically significant adverse effects were not detected and any changes in laboratory values were minimal, clinically insignificant and reversible. Mifentidine appears to be an effective and safe once-a-day treatment for acute duodenal ulcer disease.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-2568
    Keywords: roxatidine ; ranitidine ; MKN 28 ; cell proliferation ; cell migration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Gastric mucosal cell migration and proliferation are crucial events in the repair of gastric mucosal erosions. This study was designed to test the hypothesis that the H2 blockers roxatidine and ranitidine might stimulate migration and proliferation of gastric mucous cells derived from a human well-differentiated gastric adenocarcinoma cell line (MKN 28 cells)in vitro, in conditions independent of systemic factors and of acid inhibition. Confluent monolayers of MKN 28 cells were wounded with a razor blade and were then incubated with roxatidine or ranitidine. The number of cells migrating to the damaged area was determined 24 hr later. Cell proliferation was assessed by means of [3H]thymidine uptake and cell counts after incubation with roxatidine or ranitidine. Neither H2 antagonist significantly stimulated cell migration. On the other hand, cell proliferation was dose-dependently and significantly enhanced by incubation with roxatidine and ranitidine. Exogenous administration of TGF-α significantly stimulated MKN 28 cell division. However, incubation with roxatidine or ranitidine did not increase the steady-state mRNA expression of TGF-α or EGFR as assessed by northern blot analysis. Based on thesein vitro findings, we postulate that the ulcer healing effect of these H2 antagonistsin vivo might be due in part to stimulation of gastric mucosal cell proliferation.
    Type of Medium: Electronic Resource
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