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


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,?) 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,? and CLtot were significant (P<0.05). In conclusion, tramadol excretion was significantly prolonged in middle-aged dogs.

SUBMITTER: Itami T 

PROVIDER: S-EPMC4937138 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature

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

Itami Takaharu T   Saito Yasuo Y   Ishizuka Tomohito T   Tamura Jun J   Umar Mohammed A MA   Inoue Hiroki H   Miyoshi Kenjiro K   Yamashita Kazuto K  

The Journal of veterinary medical science 20160211 6


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 4.7  ...[more]

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