The invention relates to application of
diosmin in preparation of a
medicine for improving emotional symptoms of an IBS (
Irritable Bowel Syndrome) patient. According to the application, the application range of the
medicine diosmin which has been clinically approved and is suitable for treating various symptoms related to
vein lymphatic insufficiency and various symptoms related to acute hemorrhoid
attack is expanded to treatment of emotional symptoms of IBS patients for the first time; specifically, the invention provides a new application of
diosmin in preparation of medicines for improving the emotional symptoms of IBS patients, breakthrough transformation of new use of old medicines is realized, and strict
animal model experiments prove that diosmin can effectively improve the emotional symptoms of IBS model mice and IBS patients. Besides, as a clinically approved
medicine, the safety,
pharmacokinetics and dosage range of diosmin in a
human body are fully verified, so that a
solid foundation is provided for the diosmin to quickly enter a clinical test stage of emotional symptoms of IBS patients, the research and
development period is remarkably shortened, and the transformation risk is reduced.