Pharmacokinetics of ropivacaine mesylate and ropivacaine hydrochloride in dogs / 第三军医大学学报

ABSTRACT

Objective To study the bioequivalence of domestic ropivacaine mesylate in compared with imported ropivacaine hydrochloride in Beagle dogs.Methods Ropivacaine mesylate and ropivacaine hydrochloride at a dose of 10 ?mol/kg was administered intravenously in a randomized cross-over test.The plasma level of ropivacaine was measured by high performance liquid chromatography(HPLC).The pharmacokinetic parameters of ropivacaine were determined by the soft pack of Practical Pharmacokinetic Program Version 97(3P97).Results The pharmacokinetic parameters of ropivacaine mesylate were T_(1/2?)(3.83?1.89) min,T_(1/2?)(41.08?4.47) min,AUC_(0-200)(148.67?87.51) ?g?ml~(-1)?min~(-1),C_(max)(3.96?1.50) ?g/ml,CL(s)(0.030?0.014) L?kg~(-1)?min~(-1),and these parameters of ropivacaine hydrochloride were(3.09?1.19) min,(38.43?4.41)min,(125.80?81.06) ?g?ml~(-1)?min~(-1),(3.72?1.31) ?g/ml,(0.030?0.013) L?kg~(-1)?min~(-1) respectively.Conclusion The bioavailability of ropivacaine mesylate is equal to that of ropivacaine hydrochloride.