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  • 1
    ISSN: 1432-1041
    Keywords: p-Chlorophenoxyisobutyric acid ; clofibrate ; steady-state plasma concentrations ; bioavailability ; pharmacokinetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Plasma concentrations and bioavailability of clofibrinic acid have been estimated under conditions approaching the steady-state during a ten-day period of administration as clofibrate or as a calcium clofibrinate-carbonate combination (1:1 w/w) at a dosage interval of 12 h. Formulation — related differences in bioavailability were not significant, and the 95% confidence limits of these differences were within −2% to +8% of the mean for the reference formulation of clofibrate. The mean steadystate plasma concentrations of clofibrinic acid measured on the tenth day of dosing were 116 µg/ml±22 S.D. and 119 µg/ml±23 S.D. after administration of 885 mg as clofibrate and the calcium clofibrinate-carbonate combination respectively. The peaks of mean plasma concentrations were 70 µg/ml±15 S.D., 119 µg/ml±32 S.D. and 131 µg/ml±26 S.D. on the first, fifth and tenth day of dosing with clofibrate, and 62 µg/ml±13 S.D., 127 µg/ml±S.D. and 143 µg/ml±25 S.D. on the corresponding days of dosing with the calcium clofibrinate-carbonate combination. After the last dose on the tenth day of dosing, the mean apparent half-lives of elimination of clofibrinic acid from plasma were 24.2 h±4.4 S.D. and 25.5 h±3.2 S.D. after administration of clofibrate and the calcium clofibrinate-carbonate combination respectively.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1573-8744
    Keywords: flunitrazepam ; single dose ; multiple dose ; hypnotic ; two-compartment model ; benzodiazepine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Healthy human subjects received single and multiple oral doses of flunitrazepam. Absorption and disposition were first order and reproducible from administration to administration. The oral doses were virtually completely available to the liver, and elimination from the body occurred entirely via metabolism. Assuming the liver to be the sole eliminating organ, hepatic blood clearance and extraction ratio were approximately 0.235 liter/hr/kg and 0.154, respectively. Steady-state blood volume of distribution averaged 3.76 liters/kg in the single-dose studies. Terminal exponential half-lives from the single- and multiple-dose studies (different subjects) averaged 13.5 and 19.2 hr, respectively, these differences were not due to clearance changes but were entirely attributable to variations in volumes of distribution.
    Type of Medium: Electronic Resource
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