Comparison of pharmacokinetics of tramadol between young and middle-aged dogs

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Abstract

This study aimed to compare the pharmacokinetics of tramadol between young and middle-aged dogs. Tramadol (4 mg/kg) was administered intravenously (IV) to young and middle-aged dogs (2 and 8–10 years, respectively). Plasma concentrations of tramadol were measured using high-performance liquid chromatography (HPLC), and its pharmacokinetics best fit a two-compartment model. The volume of distribution (Vd), elimination half-life (t1/2,β) and total body clearance (CLtot) of the young group were 4.77 ± 1.07 l/kg, 1.91 ± 0.26 hr and 29.9 ± 7.3 ml/min/kg, respectively, while those of the middle-aged group were 4.73 ± 1.43 l/kg, 2.39 ± 0.97 hr and 23.7 ± 5.4 ml/min/ kg, respectively. Intergroup differences in the t1/2,β and CLtot were significant (P<0.05). In conclusion, tramadol excretion was significantly prolonged in middle-aged dogs.

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APA

Itami, T., Saito, Y., Ishizuka, T., Tamura, J., Umar, M. A., Inoue, H., … Yamashita, K. (2016, June 1). Comparison of pharmacokinetics of tramadol between young and middle-aged dogs. Journal of Veterinary Medical Science. Japanese Society of Veterinary Science. https://doi.org/10.1292/jvms.15-0638

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