The average rate of entrapping 5-Fu by FCA is 84. 5%. The experiment showed that 5- Fu-FCA had a slow release of 5-Fu in vitro and in vivo.

• 5－Fu－FCA体外缓释试验结果和Wistar大鼠体内5－Fu及5－Fu－PCA吸收试验均表明：5－Fu用FCA包裹后，在体内外具有缓慢释放的作用。