Results Nizatidine was poorly absorbed,and the comparison of Ka in different segments is as follows:duodenum>ileum>jejunal>colon.There was no significant difference of absorption parameters.

• 结果尼扎替丁在全肠段均有吸收，但吸收都较差，吸收速率常数为十二指肠>回肠>空肠>结肠，不同浓度尼扎替丁循环时，吸收参数无统计学差异。