Objective: To observe effect of effective substances of Simotang (arecoline,linderane,hesperidin and costunolide) on gas-trointestinal motility function in mice under chronic stress. Methods: 144 mice were divided into normal group (n=8) and model group (n=136) . Model group was under unpredictable chronic stress,after 21d,divided to model group,Simo decoction group and 15 substances groups. 7days after medication,gastrointestinal motility were assessed. Results: The model group showed slower gastric empty- ing and slower intestinal pr...