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  • Title: Pharmacokinetics of a single, orally administered dose of digoxin in horses.
    Author: Pedersoli WM, Ravis WR, Belmonte AA, McCullers RM.
    Journal: Am J Vet Res; 1981 Aug; 42(8):1412-4. PubMed ID: 7294477.
    Abstract:
    Digoxin (elixir, 0.022 mg/kg) was administered via stomach tube to healthy horses of mixed breeding and sexes. Serum digoxin concentrations reached a peak (2.21 +/- 0.6 ng/ml) at approximately 1 hour after dosing and had a half-life of 28.8 +/- 10.7 hours. Digoxin kinetics followed a triexponential curve, indicating that at least a 2 compartmental model is required to characterize the serum concentration-time curve after this route of administration. It was calculated that to achieve average serum concentrations of 1.1 ng/ml, an oral dose of 17.4 microgram of digoxin elixir/kg/day and an IV dose of 6.1 microgram of parenteral preparation/kg/day would be required. There was no significant (P greater than 0.05) alteration in base-line serum calcium, potassium, and sodium concentrations and heart rate, P-R interval, and mean arterial blood pressure.
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