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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Pharmacokinetics and pharmacodynamics of dexamethasone after intravenous administration in camels: Effect of dose
Veterinary Research Communications, Volume 28, No. 6, Year 2004
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Description
The pharmacokinetics and pharmacodynamics of dexamethasone were evaluated in healthy camels after single intravenous bolus doses of 0.05, 0.1 and 0.2 mg/kg body weight. Dexamethasone showed dose-independent pharmacokinetics. The pharmacokinetic parameters of the two-compartment pharmacokinetic model for the lowest intravenous dose (mean±SD) were as follows: terminal elimination half-life 8.17±1.79 h; total body clearance 100.7±52.1 (ml/h)/kg; volume of distribution at steady state 0.95±0.23 L/kg; and volume of the central compartment 0.22±0.07 L/kg. The extent of plasma protein binding was linear over the concentration range 5-100 ng/ml and averaged 75%±2%. Pharmacodynamic effects were evaluated by measuring endogenous plasma cortisol concentrations, numbers of circulating lymphocytes and neutrophils and plasma glucose concentrations and were analysed using indirect pharmacokinetic/pharmacodynamic models. The cumulative systemic effect increased with dose for markers of pharmacodynamic activity. The estimated IC50 of dexamethasone for cortisol and lymphocytes for the lowest dose were 3.74±2.44 and 5.58± 8.37 ng/ml, respectively and the EC50 values for neutrophils and glucose were 45.8±36.9 and 1.17±0.71 ng/ml, respectively. © 2004 Kluwer Academic Publishers.
Authors & Co-Authors
Al-Katheeri, Nawal Abdulla
United Arab Emirates, Abu Dhabi
Camel Racing Laboratory
Wasfi, Ibrahim Abdel Rahman
United Arab Emirates, Abu Dhabi
Camel Racing Laboratory
Lambert, M.
Ireland, Dublin
Trinity College Dublin
Saeed, Ahsan
United Arab Emirates, Abu Dhabi
Veterinary Research Centre
Statistics
Citations: 15
Authors: 4
Affiliations: 3
Identifiers
Doi:
10.1023/B:VERC.0000040243.30199.1f