冬凌草甲素纳米结晶黏附性缓释片的制备及体外评价

目的制备冬凌草甲素纳米结晶黏附片,考察其体外释放性、黏附性和结晶药物形态。方法采用高压均质法将冬凌草甲素制成纳米结晶,以羟丙甲纤维素(HPMC)和卡波姆为生物黏附材料,甘露醇为稀释剂和支架剂制备冬凌草纳米结晶生物黏附性缓释片。采用紫外分光光度法测定冬凌草甲素的含量,采用正交设计结合多元线性回归,以累计释放率为主要考察指标,考察了HPMC、卡波姆、甘露醇的用量对药物溶出的影响,确定了片剂的优化处方,并对片剂的黏附性和体外药物释放做了考察。结果最佳处方含HPMC31.0%,卡波姆21.7%,甘露醇7.44%。片剂中药物以纳米结晶形式从片剂中溶出,而且具有黏附和缓释作用。结论以最佳制备工艺条件制备纳米结晶片,制备工艺简单,重现性好。同时体外实验表明,冬凌草甲素纳米结晶生物黏附性缓释片显示了纳米结晶与生物黏附的双重优点。

Formulation of nanocrystalline oridonin bioadhesive tablets and measurement in vitro

Purpose To design oridonin nanocrystalline tablets formulation to study its release behavior,the bioadhesion and the morphology of drug.MethodsHigh pressure homogenization was utilized to prepare nanocrystals for oridonin.Following oridonin nanocrystals were fabricated into bioadhesive tablet using hydroxypropylmethlcellulose(HPMC)and carbopol(CP 934p)as the bioadhesive materials and mannitol as diluents.The content of oridonin was determined by UV method.Orthogonal project together with multiple linear reg...