The solubility, stability in gastrointestinal tract, membrane permeability and presystemic metabolism of drugs were the major factors on oral drug absorption.
药物的溶解性，在胃肠道中的稳定性，膜的通透性和全身代谢是影响口服药物吸收的主要因素。
2
Other drugs target the brain's interaction with organs that aren't usually associated with autism, including those of the gastrointestinal tract and the immune system.
另有一些药物是针对大脑和包括肠胃道和免疫系统在内的通常认为与自闭症无关的其他器官之间的相互作用。
3
The paper summarized the drugs that regulated gastrointestinal motility and the method of invisible spectro experiment.