羟丙甲纤维素对头孢克洛缓释片释放度的影响

摘要

Objective To investigate effect of hydroxypropyl methyl cellulose (HPMC) to in vitro release characteristics of cefaclor sustained-release tablets.Methods Collected 10 batches of HPMC from different manufacturers.Determined the viscosity, molecular weight and the distribution of molecular weight of HPMC.HPMC from different manufacturers was used as blocking agent for the preparation of cefaclor sustained-release tablets according to the same prescription.Results The molecular weight was positively related to the viscosity of HPMC.The more molecular weight was, the slower the drugs release rate was,the better controlled released.Conclusion HPMC from different manufacturers show different quality stability and effect in vitro release of cefacor sustained-release tablets.%目的 考察羟丙甲纤维素(hydroxypropyl methyl cellulose,HPMC)样品对头孢克洛缓释片的缓控释效果的影响.方法 收集不同厂商的10批羟丙甲纤维素样品,考察不同批次HPMC样品的黏度和分子量及分子量分布等特性,按固定处方以HPMC为阻滞剂制备头孢克洛缓释片,测定释放度并比较分析不同批次HPMC对特定缓释片的影响结果.结果 HPMC样品的分子量大小与样品的黏度呈正相关,分子量越大,药物释放速度越慢,缓控释效果越好.结论 不同厂商的HPMC样品质量稳定性各异,会影响制剂的缓控释效果.