Pharmacokinetics and Bioavailability of Pulse Controlled-release Tablets of Ketoprofen in Dogs / 中国药房

ABSTRACT

OBJECTIVE: To study the pharmacokinetics and bioavailability of pulse controlled-release tablets of ketoprofen(KRT) in dogs.METHODS: A total of 6 dogs were randomly assigned to receive KRT(trial group,n=3) or KP enteric-coated capsules(control group,n=3) 150 mg,then a crossover trial was conducted 1 week later.Plasma samples were taken at different time points and the plasma concentration of ketoprofen in dogs was determined by HPLC.The pharmacokinetic parameters of the two KP preparations were computed and the correlation between absorption percentage in vivo and release rate in vitro was compared.RESULTS: The pharmacokinetic parameters of KRT versus those of its control preparation were as follows tmax(5.00?0.41) vs.(3.75?0.00) h;Cmax(15.40?1.94) vs.(20.73?1.72) ?g?mL-1;AUC0～t(101.33?17.49) vs.(93.21?25.03) ?g?h?mL-1.The relative bioavailability of the trial preparation was 108.71%.The test preparation showed a good correlation(r=0.987) between absorption percentage in vivo and release rate in vitro.CONCLUSIONS: The KRT and KP enteric-coated capsules were bioequivalent.