The invention relates to a preparation method of clarithromycin microcapsules. The technological steps are as follows: 1) crushing clarithromycin granules until the density of clarithromycin powder is close to that of carbompson, and then uniformly mixing clarithromycin powder with carbompson to obtain clarithromycin sustained-release coated particles by dry granulation, tablet pressing and sieving; 2) dissolving methacrylic acid copolymer in isopropanol; Enteric-coated solution was prepared in the mixed solution of polyvinyl ethylene glycol (PEG). 3) Clarithromycin sustained-release coated particles obtained in process 1 were put into the bottom-sprayed fluidized bed. After complete fluidization, the enteric-coated solution of process 2 was injected into the fluidized bed through bottom-spraying to complete the enteric-coated solution. After that, the fluidized bed continued to boil and dry, and Clarithromycin microcapsules meeting the quality standards were obtained. The invention avoids the swelling and adhesion of carbomer in water, reduces the density difference between clarithromycin and carbomer after crushing, and achieves uniform mixing. The preparation process of clarithromycin microcapsules by this method is simple and feasible, and is convenient for industrial production.
【技术实现步骤摘要】
一种克拉霉素微囊的制备方法
本专利技术属于生物与医药新
,特别是涉及一种克拉霉素微囊的制备方法。
技术介绍
微囊化是指利用天然的或合成的高分子材料(统称为囊材)作为囊膜壁壳,将固态或液态药物包裹成为的微型胶囊。微囊(又称微丸化胶囊)具有掩盖药物的不良气味及口味、提高药物的稳定性、减少药物对胃的刺激、方便使用等特点,通过微囊化技术,将药物微囊化后能避免胃酸的破坏,同时通过非胃肠道可缓释给药,可使许多按过去标准认为不合格的落选药物,做成满意的新药。这对新药的开发特别有意义。中国专利《克拉霉素肠溶微丸胶囊及其制备方法》CN201310372793.5提供了一种以卡波姆为囊材的克拉霉素肠溶微丸胶囊的制备工艺,卡波姆作为一种缓释包衣剂,与克拉霉素按一定比例混合后,加入到湿法制粒机中,通入乙醇水溶液,完成制粒。由于卡波姆具有遇水溶胀和粘连的特点,在制粒时卡波姆遇水形成凝胶状,形成各种不规则的抱团。且卡波姆和克拉霉素密度差异悬殊,卡波姆粉末轻,克拉霉素颗粒重,二者混合时卡波姆始终处于漂浮状态,造成微囊载药量不可控。因此该专利方法难以实现工业化。
技术实现思路
本专利技术目的就 ...
【技术保护点】
1.一种克拉霉素微囊的制备方法,其特征在于其工艺步骤为:1)将克拉霉素颗粒粉碎至其粉末松密度与卡波姆松密度接近,然后将克拉霉素细粉与卡波姆均匀混合,以干法制粒、压片、过筛得到克拉霉素缓释包衣微粒;2)将甲基丙烯酸共聚物溶解于异丙醇和聚乙烯乙二醇的混合溶液中,制成肠溶包衣液;3)将过程1)所得的克拉霉素缓释包衣微粒放入底喷流化床,完全流化后,通过底喷将过程2)的肠溶包衣液打入流化床,完成肠溶包衣,之后流化床继续沸腾干燥,得到克拉霉素微囊。
【技术特征摘要】
1.一种克拉霉素微囊的制备方法,其特征在于其工艺步骤为:1)将克拉霉素颗粒粉碎至其粉末松密度与卡波姆松密度接近,然后将克拉霉素细粉与卡波姆均匀混合,以干法制粒、压片、过筛得到克拉霉素缓释包衣微粒;2)将甲基丙烯酸共聚物溶解于异丙醇和聚乙烯乙二醇的混合溶液中,制成肠溶包衣液;3)将过程1)所得的克拉霉素缓释包衣微粒放入底喷流化床,完全流化后,通过底喷将过程2)的肠溶包衣液打入流化床,完成肠溶包衣,之后流化床继续沸腾干燥,得到克拉霉素微囊。2.按照权利要求1所述的克拉霉素微囊的制备方法,其特征在于,过程1)中,所述克拉霉素微粒中包含,克拉霉素:35~5...
【专利技术属性】
技术研发人员:罗江涛,李学兵,王晶,张志,
申请(专利权)人:宁夏启元药业有限公司,
类型:发明
国别省市:宁夏,64
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