摘要
研究双氯芬酸钠注射液在猪体内的药物动力学特征和生物利用度,为其临床合理使用提供实验依据。选用8头健康猪,采用两周期随机交叉实验设计,单剂量静脉注射或肌内注射5%双氯芬酸钠注射液(2.5mg·kg^(-1)),高效液相色谱法(HPLC)检测猪血浆中双氯芬酸钠浓度,采用DAS 2.1.1软件对血药浓度-时间数据进行非房室模型分析,计算药动学参数。结果显示,猪静脉注射给药的药动学参数如下:消除半衰期(T_(1/2β))为(1.32±0.34)h,药-时曲线下面积(AUC)为(55.50±5.50)(μg·mL^(-1))·h,平均滞留时间(MRT)为(1.60±0.28)h,表观分布容积(V_d)为(0.50±0.05)L·kg^(-1),总体清除率(CL_B)为(0.26±0.04)L·(h·kg)-1。猪肌内注射给药的药动学参数如下:峰时(T_(max))为(1.19±0.26)h,峰浓度(C_(max))为(11.61±5.99)μg·mL^(-1),T_(1/2β)为(1.87±0.70)h,AUC为(43.17±7.77)(μg·mL^(-1))·h,MRT为(2.86±0.64)h,生物利用度(F)为(78.29±14.81)%。结果提示,双氯芬酸钠注射液肌注给药后在猪体内具有吸收良好、达峰迅速、血药峰浓度高、消除较快、生物利用度较高的药物动力学特征,临床推荐给药剂量为2.5mg·kg^(-1)。
Pharmacokinetics and bioavailability of diclofenac sodium injection were investigated in swine. A single intravenous (i. v. ) or intramuscular (i. m. ) administration of 5%diclofenac sodi- um injection at a dosage of 2.5 mg · kg-1 was performed in eight healthy pigs according to a two- period crossover design. The concentration of diclofenac sodium in plasma was determined by a high performance liquid chromatography method (HPLC). The pharmacokinetic parameters vcere calculated by non-compartmental analysis with DAS 2. 1. 1 software. The main pharmacokinetic parameters of diclofenac sodium injection in swine after a single intravenous administration were as follows:the elimination half time (T1/2β) was (1.32±0.34) h,area under the curve (AUC) was (55.50±5.50) (μg·mL-(-1))·h,mean residence time (MRT) was (1.60±0.28) h,apparent vol- ume of distribution (Va) was (0.50±0.05) L · kg-1 ,body clearance (CLB) was (0. 26±0. 04) L -1(h · kg) 1. The main pharmacokinetic parameters of diclofenac sodium injection in swine after a single intramuscular administration were as follows.peak time (Tin,x) was (1.19±0.26) h,peak concentration (Cmax) was (11. 61±5. 99) (μg·mL-(-1))·h ,TI/2β was (1.87±0.70) h,AUC was (43.17±7.77) (μg·mL-(-1))·h,MRT was (2.86±0.64) h,bioavailability (F) was (78.29±14.81). The results showed that the diclofenac sodium injection have pharmacokinetic characteristics of rapid absorption and elimination, high peak concentration and bioavailability in swine, and the clinical recommended dosage of diclofenac sodium injection is 2.5 mg· kg 1.
出处
《畜牧兽医学报》
CAS
CSCD
北大核心
2016年第5期1001-1008,共8页
ACTA VETERINARIA ET ZOOTECHNICA SINICA
基金
江苏省高校青蓝工程资助项目
江苏农牧科技职业学院科研项目(NSFPT201514)
江苏省优势学科建设工程项目