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Title: Pharmacokinetics of digoxin in sheep: limitations of the use of biological half-life for interspecies extrapolation.

Authors: Dix, L P; Bai, S A; Rogers, R A; Anderson, D L; Riviere, J E

Published In Am J Vet Res, (1985 Feb)

Abstract: After of single IV digoxin injection of 50 micrograms/kg of body weight, the serum digoxin concentrations of 4 sheep were fitted to a 2-compartment open model. The mean value for the elimination half-life was 7.15 hours; for area volume of distribution, 13.8 L/kg; and for total body clearance, 1.36 L/kg/hr. A comparison of this study with previous studies in sheep and cattle revealed that serious misconceptions could arise if one chose to rely upon elimination half-life as the sole descriptor of drug disposition. A more informative characterization was determined to be total body clearance and area volume of distribution.

PubMed ID: 3994115 Exiting the NIEHS site

MeSH Terms: Animals; Digoxin/administration & dosage; Digoxin/blood; Digoxin/metabolism*; Half-Life; Injections, Intravenous/veterinary; Kinetics; Sheep/metabolism*; Species Specificity

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