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Pharmacokinetics and sedative effects of intramuscular medetomidine in domestic sheep

Kästner, Sabine Beate Rita; Wapf, P; Feige, Karsten; Demuth, Daniel; Bettschart-Wolfensberger, Regula; Akens, M K; Huhtinen, M (2003). Pharmacokinetics and sedative effects of intramuscular medetomidine in domestic sheep. Journal of Veterinary Pharmacology and Therapeutics, 26(4):271-276.

Abstract

Intramuscular (i.m.) administration of medetomidine (MED) may avoid the severe pressor effects caused by peripheral actions of MED associated with intravenous (i.v.) dosing. The purpose of this study was to determine the pharmacokinetics, the time course of sedation and occurence of hypoxaemia after i.m. administration of MED in domestic sheep. The MED was injected i.m. at a dose of 30 micro g/kg in nine domestic sheep. Blood was sampled at 0, 5, 10, 20, 30, 40, 60, 120, 180, 240, 360 and 600 min after MED. Sedation was assessed and arterial blood samples were taken before and 35 min after MED application. Mean (SD) pharmacokinetic parameters of i.m. MED were: absorption half-life: 13.2 (7.5) min; terminal half-life: 32.7 (14.9) min; time to peak concentration: 29.2 (8.9) min; peak concentration: 4.98 (1.89) ng/mL; volume of distribution: 3.9 (2.4) l/kg; total body clearance: 81.0 (21.5) mL/(min kg). Peak sedation occurred between 30 and 40 min after injection of MED. The degree of sedation correlated with individual plasma concentrations (rS: 0.926). One animal became hypoxaemic (PaO2 = 54.1 mmHg).

Additional indexing

Item Type:Journal Article, refereed, further contribution
Communities & Collections:05 Vetsuisse Faculty > Veterinärwissenschaftliches Institut > Institute of Veterinary Pharmacology and Toxicology
05 Vetsuisse Faculty > Veterinary Clinic > Equine Department
Dewey Decimal Classification:570 Life sciences; biology
Scopus Subject Areas:Life Sciences > Pharmacology
Health Sciences > General Veterinary
Language:English
Date:2003
Deposited On:20 Mar 2009 13:24
Last Modified:02 Jun 2025 01:38
Publisher:Wiley-Blackwell
ISSN:0140-7783
Funders:others
OA Status:Closed
Publisher DOI:https://doi.org/10.1046/j.1365-2885.2003.00492.x
PubMed ID:12887609

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