头孢哌酮及其与他唑巴坦的复方制剂在家犬体内的药动学研究

目的 :考察头孢哌酮钠在家犬体内的药动学特征 ,比较头孢哌酮钠复方制剂与单组分头孢哌酮钠的药动学差异。方法 :对6只健康家犬单剂量静脉注射头孢哌酮钠粉针剂和注射用头孢哌酮钠/他唑巴坦钠复方制剂后 ,采用反相高效液相色谱法测定血清中头孢哌酮钠的血药浓度 ,用3p97药动学程序计算药动学参数。结果 :单一制剂与复方制剂的头孢哌酮钠在体内的处置都符合二室模型 ,AUC0→∞分别为 (486 17±117 98)、(469 74±71 49) (mg·h)/L ,T1/2β 分别为 (0 96±0 13)、(0 85±0 17)h ;参数值经方差分析、双单侧t检验和[1 -2α]置信区间法分析 ,均无显著性差异 (P>0 05)。结论 :以AUC0→∞为衡量指标 ,两种制剂中的头孢哌酮钠具有生物等效性。

Pharmacokinetics of Single Cefoperazone Sodium and Cefoperazone Plus Tazobactam in Dogs

OBJECTIVE:To study the pharmacokinetics of Cefoperazone in dogs and compare the pharmacokinetic differˉence between single Cefoperazone and Cefoperazone plus Tazobactam.METHODS:Six healthy dogs were given intravenously a single dose of Cefoperazone Sodium and Cefoperazone-Tazobactam Sodium.Levels of Cefoperazone in dogs'serum were deˉtermined by RP-HPLC method.The pharmacokinetic parameters were obtained and compared between Cefoperazone Sodium and Cefoperazone-Tazobactam Sodium.RESULTS:The serum drug concentration-time course in dogs was conformed to the two-compartment model after a single dose of Cefoperazone Sodium and Cefoperazone-Tazobactam Sodium.Area under the concentration-time curve(AUC 0～∞ )was(486.17±117.98)、(469.74±71.49)(mg·h)/L,half-time(T 1/2β )was(0.96± 0.13)、(0.85±0.17)h,respectively.There were no significant differences between two groups.CONCLUSION:Taking AUC 0～∞ as index,two preparations are bioequivalent.