| 摘要 |
The present invention relates to a pharmaceutical or nutraceutical preparation comprising a) a core containing a pharmaceutically or nutraceutically active substance; and b) an inner controlling layer surrounding the core comprising i) one or a mixture of a plurality of (meth)acrylate copolymers bearing a cationic group or a group that can be converted to a cationic group; and ii) one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group; and c) an outer controlling layer comprising one or a mixture of a plurality of polymers or copolymers bearing an anionic group or group that can be converted to an anionic group and to tablets or capsules comprising same. |
