The invention provides a nifedipine osmotic pump controlled-release tablets, using ethyl cellulose povidone as membrane material, long-term storage of semipermeable membrane aging, end release does not reduce the asymmetric shape; preferably, not only reduce the release of terminal residues, but also simplify the identification of laser drilling, and the conveying belt in the smooth place laser drilling hole, is easy to play in the middle, more conducive to stable drug release. The invention also provides a method to improve the nifedipine osmotic pump controlled-release tablets were anti aging, which is characterized by the use of ethyl cellulose povidone as membrane materials. In addition, the present invention also provides the use of ethyl cellulose povidone compositions for the preparation of nifedipine osmotic pump controlled release tablets with anti-aging properties.
【技术实现步骤摘要】
【技术保护点】
１．一种硝苯地平渗透泵型控释片，其特征是采用乙基纤维素－聚维酮作为半透膜材料，乙基纤维素－聚维酮的重量比为３０∶１４～１８。
【技术特征摘要】
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