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  • 1
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of the anticonvulsant drug clonazepam evaluated from single oral and intravenous doses and by repeated oral administration (1975)
    Springer
    European journal of clinical pharmacology 9 (1975), S. 155-159 
    Details
    ISSN: 1432-1041
    Keywords: Anticonvulsants ; benzazepines ; clonazepam ; pharmacokinetics ; gas chromatography ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Eight healthy volunteers were given single i.v. and oral doses of clonazepam (2 mg). The disposition curves after i.v. administration showed a biexponential decline and the data were applied to a two-compartment open model. The volume of distribution ((Vd)β) ranged between 1.5 and 4.4 l/kg and the plasma half-life (t1/2) between 19 and 60 hours. Absorption after oral administration was fast, with peak plasma concentrations within 4 hours in all subjects. Five of the subjects received repeated oral doses of clonazepam 0.5 mg bid for 15 days. The plasma level during steady state (estimated as Cmin within the dose interval) could be predicted from the constants A, B, α and β obtained in the single dose study with a coefficient of variation of 6%. The plasma half-lives after cessation of the subchronic dosing were of the same magnitude as after single doses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614012
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  • 2
    Electronic Resource
    Electronic Resource
    Pharmacokinetics of single and multiple doses of phenytoin in man (1974)
    Springer
    European journal of clinical pharmacology 7 (1974), S. 81-86 
    Details
    ISSN: 1432-1041
    Keywords: Phenytoin ; single- and multiple dose pharmacokinetics ; dose-dependent kinetics ; bioavailability ; plasma concentration ; man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Plasma concentration of phenytoin (diphenylhydantoin, DPH) have been studied in 5 volunteers after single oral and iv doses (5.0 mg sodium DPH/kg), and after multiple oral doses (2.0 mg sodium DPH/kg b.i.d. for 12 days). The data were analysed according to a one compartment model. The plasma half-life was 14.5 h±1.2 S.D. after i.v. administration, its apparent volume of distribution varied little (0.52 l/kg±0.04) and its bioavailability ranged between 0.70 and 1.0 (mean 0.87). After oral administration peak plasma concentrations were reached in 4 to 12 h. Elimination curves were slightly convex, probably due to an effect of slow absorption. Steady-state plasma levels varied twofold between individuals after multiple oral doses and exceeded those predicted from the single i.v. dose by 29 to 77%. The discrepancy was considered to be due to transition to dose-dependent kinetics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00561319
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    Paper (German National Licenses)
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