摘要
目的通过建立药代动力学/药效学(PK/PD)模型确定加替沙星胃肠道最佳给药方案。方法募集40名健康志愿者按3种给药方案(分别为:400mg qd、200mg bid、100mg qid)口服加替沙星片,HPLC-UV法测定血药浓度,求出药代动力学参数即加替沙星对敏感菌的抗菌活性MIC90;用DAS软件拟合出不同给药方案时%T>MIC90,确定加替沙星胃肠道最佳给药方案。结果根据建立的PK/PD模型拟合结果,3种给药方案的%T>MIC90分别为31.6%、42.6%和17.8%。结论优化的加替沙星胃肠道给药方案为200mg,bid,此时%T>MIC90符合35%~55%的理想比值。
Objective To study dosage regimen of gatifloxacin by gastrointestinal tract based on pharmacokinetic-pharmacodynamic model. Methods The study was conducted in 40 healthy vounteers. After receiving a single dose of 400 mg gatifloxacin tablets on the three dosage regimens ( 400mg one time a day, 200rag two times a day, 100 mg four times a day ). Blood drug concentrations were determined by HPLC-UV and the pharmaeokinetic parameters were calculated by DAS program. The pharmacodynamic parameters were minimal inhibitory concentration ( MIC90 ) of sensitive bacteria. The pharmacokinetic and pharmacodynamic parameters were simulated by DAS program for %T 〉 MIC90 value, and reasonable dosage regimen was calculated. Results The PK/PD model established by DAS suggested that the value of %T 〉 MIC90 of three dosage regimens were 31.6%, 42.6% and 17.8%, respectively. Conclusion To achieve the ideal value 35%-55% of T 〉 MIC90 and more effectiveness, gatifloxacin may be taken orally 200 mg two times a day.
出处
《中国现代医生》
2011年第27期59-61,共3页
China Modern Doctor