Coated tablet is take out after laid in artificial gastric juice for 1 h and placed in artificial intestinal liquid, partial coating is corroded and appears a great quantity of hole in a utensil at 3 h, and coating starts to burst and release at 3.5 h.

• 将包衣片在人工胃液中滞留1h；取出放入人工肠液中3h；包衣膜被部分溶蚀；出现大量孔洞；但无放射性漏出; 3.；5h后有放射性漏出；表明包衣膜开始破裂释药。