Objective To observe the short-term and medium-term clinical effect of the therapy of liver dispersing with spleen strengthening on diarrhea predominant irritable bowel syndrome (IBS-D).Methods 107 patients were divided randomly into 2 groups,53 of them were treated with the decoction of liver dispersing with spleen strengthening(herb group),and the other 54 were treated with Pinaveriu1m Bromide (Pinaverium Bromide group).The course of treatment was 4 weeks,and there was a 3-month follow-up.The scores of sy...