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  • Articles: DFG German National Licenses  (2)
  • 1985-1989  (2)
  • Pharmacokinetics  (1)
  • absorption  (1)
  • Alpidem
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  • Articles: DFG German National Licenses  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 28 (1985), S. 225-227 
    ISSN: 1432-1041
    Keywords: theophylline ; absorption ; food intake ; aqueous solution ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The effect of food on the rate and extent of absorption of theophylline was studied in healthy adults given a single dose of theophylline (aqueous solution of choline theophyllinate containing 270 mg of theophylline) in the evening either on an empty stomach or together with supper. Food appeared to decrease the absorption rate of theophylline significantly, tmax being prolonged from 1.34 h (mean) to 4.40 h and cmax decreased from 7.82 mg·l−1 to 5.47 mg·l−1. The area under the plasma concentration-time curve (AUC) after drug intake with supper was slightly but not significantly smaller, indicating that theophylline (as a solution of choline theophyllinate) can be taken together with food without substantial loss of the quantity of drug absorbed. The elimination rate was not influenced by concomitant intake of supper.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    ISSN: 1573-739X
    Keywords: Bioavailability ; Dissolution rate ; Drug evaluation ; Pharmacokinetics ; Side effects ; Tablets, sustained release ; Theophylline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The sustained-release properties and relative bioavailability of Theolin® Retard and Pharphylline® Retard were studied in eight healthy adults after treatment for five days with twice daily 450 mg, respectively 425 mg. During the day-time dosing interval on the fourth and fifth day theophylline plasma concentrations were assayed by HPLC. After intake of Theolin® Retard, minimum theophylline plasma concentrations were significantly higher, fluctuations in theophylline plasma concentrations were significantly smaller andt 75 (the period within a dosing interval during which the plasma concentration exceeds 75% of the maximal concentration) was significantly longer than after Pharphylline® Retard. Maximal concentrations and AUC values were not significantly different. For both products the plasma concentration time-curves on day 5 were significantly lower than on day 4.In vitro dissolution tests confirmed the more sustained release of theophylline from Theolin® Retard. These results indicate an equal extent of absorption from the two products but better sustained-release properties for Theolin® Retard.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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