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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 42 (1992), S. 343-345 
    ISSN: 1432-1041
    Keywords: Omeprazole ; Theophylline ; pharmacokinetics ; drug interaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of omeprazole treatment on theophylline pharmacokinetics was studied in eight, non-smoking healthy male volunteers during repeated administration of a slow release formulation of theophylline. In a randomized double-blind cross-over study, the subjects received theophylline 5 mg·kg−1 per day with omeprazole 20 mg per day or identical placebo during two periods, each of 7 days, separated by a washout period of 7 days. The oral clearance of theophylline remained unchanged whether it was administered alone or with omeprazole (54.2 ml·min−1). The average urinary excretion of theophylline and its metabolites, 1,3 dimethyluric acid (1,3-DMU), 3-methylxanthine (3-MX), 1-methyluric acid (1-MU) amounted to 9%, 32%, 12% and 22% of the administered dose, respectively, and no significant change occured during concomitant treatment with omeprazole. Thus, the formation and clearance of the metabolites was not altered by omeprazole. Consequently, omeprazole in the recommended dose of 20 mg daily can safely be administered to patients on theophylline therapy.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1432-1041
    Keywords: NSAID ; Gastrotoxicity ; gastroscopy ; healthy volunteers ; ibuprofen ; ketoprofen ; aspirin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Endoscopic lesions of the gastric mucosa were evaluated in 12 healthy volunteers after administration of single doses of ketoprofen (25 mg), ibuprofen (200 mg) and aspirin (500 mg) in a randomized, double-blind, crossover study. The grades of the lesions (according to Lanza's scale) were lower after the administration of ketoprofen than aspirin and were comparable to ibuprofen. An endoscopic score 〉1 was observed in 3 cases after ibuprofen or ketoprofen, and in 8 cases after aspirin. At a time when low, single doses of NSAIDs are widely used as analgesics, gastroscopy makes it possible directly to assess the local agressivity of these molecules. In this way it was possible to demonstrate that the local toxicity of NSAIDs was lower than that of aspirin.
    Type of Medium: Electronic Resource
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