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  5. Felodipine緩釋錠劑於國人之藥動學特性及族群因素在銜接性試驗之評估研究
 
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Felodipine緩釋錠劑於國人之藥動學特性及族群因素在銜接性試驗之評估研究

Other Title
Pharmacokinetics of Felodipine Extended Release Tablets in Healthy Taiwanese Subjects and Evaluation of Ethnic Sensitivity Data in Bridging Study
Type
thesis
Date Issued
2011-06-30
Author(s)
蕭嘉玲
Advisor
許光陽
Subjects
系所名稱:藥學系(博士班)
Description
學位別:博士
語文別:中文
指導教授:許光陽
共同指導教授:
口試委員:陳恆德;鮑力恒;許秀蘊;吳姿樺
中文關鍵字:Felodipine;藥物動力學;台灣人;CYP3A4;族群差異;銜接性試驗;亞洲族群資料;ICH E5
Abstract
本研究主要研究felodipine於國人的藥動學特性。資料來源為回溯性分析於國內執行的五個felodipine生體相等性試驗,共收納100人。受試者服用5 mg(n = 80)或10 mg(n = 20) Plendil®(felodipine extended-release tablets; felodipine ER)連續6日。劑量校正為10 mg felodipine後,100人的tmax, ss、Cmax,ss、AUC0-tau?鉹嬪O為3.32 hr, 13.12 nmol/L and 136.33 nmol*hr/L。本研究顯示AUC/dose、Cmin/dose、CL/F不呈現常態分佈,且依據AUC/dose可區分成兩個不同CYP3A4代謝速率的族群。與文獻相較,給予我國健康男性年輕受試者5 mg felodipine ER後,其全身性暴露量與瑞典、丹麥、土耳其、加拿大健康受試者服用10 mg felodipine ER相似或略低;Cmax與德國年長受試者相似,而AUC較低約30%。顯示我國族群可能具有較低的CYP3A4代謝活性,此現象與nifedipine相似。
我國於90年1月1日開始施行銜接性試驗評估,其主要評估是否可接受外國臨床試驗資料外推至我國族群。評估概念主要依據國際法規協合會E5基準。本研究中,無論同一件銜接性試驗評估申請案申請次數,皆以一件計算。自90年1月1日起至99年6月30日止,共有366件銜接性試驗申請案件。平均免除率為73.8%。本研究中依據化學藥品/生物製劑、適應症、新藥類別、給藥途徑及完整臨床試驗是否包含亞洲族群臨床資料進行類別分析。並分析銜接性試驗申請案第一次申請未獲同意免除銜接性試驗之理由,以及廠商再次重新送件後,其免除率之分析。亞洲人之藥動學資料多數為日本人之藥動學試驗結果,其他依序為中國、台灣、韓國等。若完整臨床試驗資料中包含亞洲族群藥動學資料及臨床療效性及安全性資料,對於免除銜接性試驗相當有幫助。在某些情況下,若有藥品的安全性及/或有效性方面的族群差異性疑慮,可以上市後第四期(phase IV)臨床試驗取代銜接性試驗。
URI
https://203.71.86.71/handle/123456789/13652

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