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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    Journal of pharmacokinetics and pharmacodynamics 4 (1976), S. 157-172 
    ISSN: 1573-8744
    Schlagwort(e): prednisone bioavailability ; elimination half-lives of prednisone and prednisolone ; prednisone and prednisolone plasma levels following prednisone
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Two four-treatment crossover bioavailability studies were performed in panels of 12 adult male volunteers with eight different commercial prednisone tablets. Plasma samples from the first study were assayed by radioimmunoassay for both prednisone and prednisolone. Plasma samples from the second study were assayed for prednisolone only. Statistical analyses of the data showed significant differences in the rate of appearance of prednisolone in plasma, but not in the amount convened to prednisolone. Some observations are made on the relationships between prednisone and prednisolone concentrations in plasma following oral administration of prednisone.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Journal of pharmacokinetics and pharmacodynamics 5 (1977), S. 257-270 
    ISSN: 1573-8744
    Schlagwort(e): prednisolone bioavailability ; prednisolone radioimmunoassay ; prednisolone plasma concentrations ; elimination half-life of prednisoione ; in vitro rate of dissolution of prednisolone from tablets
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Two fourtreatment crossover studies were performed using 12 adult male volunteers in each with seven different commercially available prednisolone tablets. Plasma samples were assayed for prednisolone by a radioimmunoassay method. Statisacal analyses of the data, by analysis of variance for crossover design (ANOVA), showed no significant differences among the treatment averages at any of the sampling times except at 0.25 and 4 hr in one of the studies. There were also no significant differences among the treatment averages for peak plasma level, time of peak plasma level, area 0–12 hr, area 0–24 hr, and the halflife of elimination of prednisolone. We conclude that the average plasma concentrations of prednisolone are superimposable in a statistical sense and that the tablets tested are bioequivalent. Results of dissolution studies of six tablets of each of the seven lots of prednisolone tablets, using deaerated water in the spin filter apparatus, are presented.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Journal of pharmacokinetics and pharmacodynamics 6 (1978), S. 197-207 
    ISSN: 1573-8744
    Schlagwort(e): ethanol ; volume of distribution ; Michaelis-Menten elimination kinetics
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The novel method of estimating the volume of distribution involves (a) administering an appropriate bolus intravenous dose of the drug, (b) starting a constant-rate intravenous infusion of the drug at the same time, (c) maintaining the infusion for a given number of hours, (a) measuring the drug concentration over the entire time course, (e) computer-fitting the post-infusion data to obtain estimates of Vm and Km, (f) estimating the total area under the concentration-time curve from zero time to infinity, and (g) iteratively solving a cubic equation to obtain the estimate of the volume of distribution. The method was applied to ethanol in the cat and yielded an average value of 635ml/kg (63.5% of body weight) with a coefficient of variation of 23.0%. This is equivalent to total body water in the cat.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Journal of pharmacokinetics and pharmacodynamics 3 (1975), S. 159-170 
    ISSN: 1573-8744
    Schlagwort(e): diphenhydramine ; intravenous infusion ; oral administration ; first-pass effect ; bioavailability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Plasma levels and urinary excretion of diphenhydramine were measured after administration of three single 50-mg doses of diphenhydramine hydrochloride to two healthy male volunteers as an intravenous infusion, an oral solution, and a commercially available capsule. A large first- pass effect was evident from the data, with about 50% of the drug being metabolized by the liver before it reached the general circulation. The drug in solution given orally appeared to be fully available to the hepatoportal system, and the availability of diphenhydramine from the capsule was about 83% relative to the solution in one subject and 100% in the other subject. Cumulative amounts of unchanged diphenhydramine excreted in the urine were less than 4% of the administered dose. Both subjects went to sleep at the end of the 1-hr intravenous infusion, but were only drowsy following the oral treatments.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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