Pharmacokinetics of oxymorphone in cats

K. T. Siao, B. H. Pypendop, S. D. Stanley, J. E. Ilkiw

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


This study reports the pharmacokinetics of oxymorphone in spayed female cats after intravenous administration. Six healthy adult domestic shorthair spayed female cats were used. Oxymorphone (0.1mg/kg) was administered intravenously as a bolus. Blood samples were collected immediately prior to oxymorphone administration and at various times up to 480min following administration. Plasma oxymorphone concentrations were determined by liquid chromatography-mass spectrometry, and plasma oxymorphone concentration-time data were fitted to compartmental models. A three-compartment model, with input in and elimination from the central compartment, best described the disposition of oxymorphone following intravenous administration. The apparent volume of distribution of the central compartment and apparent volume of distribution at steady state [mean±SEM (range)] and the clearance and terminal half-life [harmonic mean±jackknife pseudo-SD (range)] were 1.1±0.2 (0.4-1.7) L/kg, 2.5±0.4 (2.4-4.4) L/kg, 26±7 (18-38) mL/, and 96±49 (62-277) min, respectively. The disposition of oxymorphone in cats is characterized by a moderate volume of distribution and a short terminal half-life.

Original languageEnglish
Pages (from-to)594-598
Number of pages5
JournalJournal of Veterinary Pharmacology and Therapeutics
Issue number6
StatePublished - Dec 2011

ASJC Scopus subject areas

  • Pharmacology
  • General Veterinary


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