祁 飛,張晨光,馬 悅
(石家莊以嶺藥業(yè)股份有限公司,河北 石家莊 050035)
非洛地平緩釋片體外多p H溶出方法建立的研究
祁 飛,張晨光,馬 悅
(石家莊以嶺藥業(yè)股份有限公司,河北 石家莊 050035)
目的建立一種模擬體內(nèi)胃腸道pH的體外溶出方法。方法 以非洛地平緩釋片作為研究對象,考察自制片與原研參比片在不同溶出條件下的體外釋放行為,并以 f2因子作為評價指標(biāo)。結(jié)果 在pH =1.2和pH=6.5的單一溶出介質(zhì)中,自制片與參比片之間的 f2因子均小于50;以pH調(diào)節(jié)劑改變?nèi)艹鲞^程中的介質(zhì)的pH后,二者體外釋放行為均符合peppas方程,f2值為61.1。結(jié)論 所建立的模擬胃腸道pH的緩釋片體外溶出方法能更準(zhǔn)確地模擬藥物的釋放行為,與傳統(tǒng)的溶出方法相比,具有更高的科學(xué)性和合理性。
非洛地平緩釋片;體外溶出;酸堿度
Abstract:Ob jective To establish an in vitro dissolution method to stimulate the gastrointestinal pH in vivo.M ethods Felodipine Sustained Release Tablets were taken as the research object to investigate the in vitro release behavior of the self-made tablets and the original tablets in different dissolution conditions,and f2factor was taken as the evaluation index.Resu lts In the single dissolution medium of pH=1.2 and pH=6.5,the f2factor between the self-made and the reference tablets was less than 50.But after the pH of the medium in the process of dissolution was changed with the pH adjuster;the release equation of the two were both in accordance with the peppas equation,and the f2value was 61.1.Conclusion The method of in vitro dissolution of simulated gastric gastrointestinal pH can simulate the release behavior of drugs more accurately,and more scientific and reasonable than traditional dissolution method.
Key words:Felodipine Sustained Release Tablets;in vitro dissolution;pH
體外溶出試驗(yàn)是評價固體制劑質(zhì)量的一種重要手段,也是建立體內(nèi)外相關(guān)性的一個重要數(shù)據(jù)基礎(chǔ)[1],是預(yù)測口服固體制劑體內(nèi)釋藥行為的依據(jù)[2]。隨著仿制藥一致性評價項(xiàng)目的不斷開展,溶出條件和方法的建立越來越引起人們的關(guān)注,科學(xué)、準(zhǔn)確的體外溶出度方法的建立,對于仿制藥的質(zhì)量控制和人體生物等效研究都具有重要意義。目前,體外溶出方法多采用不同pH條件下考察片劑的溶出行為,但片劑在體內(nèi)的崩解、溶出和吸收是一個連續(xù)的過程,具有時序性。藥物在胃腸道內(nèi)的pH環(huán)境是隨時間不斷變化的。非洛地平的化學(xué)名為2,6-二甲基 -4-(2,3-二氯苯基)-1,4-二氫 -3,5-吡啶二甲酸甲乙酯,為新一代鈣離子阻滯劑,對各種類型的高血壓均有較好的療效[3-4]。……