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  • Title: Pharmacokinetics of metoclopramide in goats.
    Author: Huhn JC, Koritz GD, Nelson DR, Brown SA.
    Journal: J Vet Pharmacol Ther; 1992 Mar; 15(1):19-27. PubMed ID: 1573702.
    Abstract:
    The pharmacokinetics of a parenteral formulation of metoclopramide (monochloride monohydrate) were determined following single intravenous (i.v.) and intramuscular (i.m.) 0.5-mg/kg doses to two groups of 4 goats in a crossover design. Mean serum concentrations of metoclopramide following i.v. administration of 0.5 mg/kg declined rapidly from a peak of 277.5 ng/ml at 3 min post-dosing to 25 ng/ml at 90 min. Serum concentrations were not detectable by 120 min after drug administration. The curve of serum concentrations vs. time was characteristic of a two-compartment open model. Mean parameters from analysis of the individual i.v. data gave a biological half-life of 0.62 h and a volume of distribution of the central compartment of 1.34 l/kg. Serum concentrations of metoclopramide following i.m. administration of 0.5 mg/kg rose rapidly to a peak of 160.9 ng/ml at 15 min post-dosing and then declined in parallel with the elimination phase of the i.v. study. These data were best described by a two-compartment open model with first-order absorption. The mean biological half-life was 1.04 h. There were no adverse reactions associated with metoclopramide at the 0.5-mg/kg dose administered by either route.
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