This product is a vasodilator that selectively acts on the capillary wall. It not only can adjust and improve the permeability and brittleness of capillary wall, but also inhibit bradykinin and other active substances. It is mainly used for treating various causes of capillary diseases, such as diabetic retinopathy, varicose veins, phlebitis, leg spasms, phlegm itching dermatitis and so on. This product has high bioavailability, low toxicity and high therapeutic index. It is an ideal drug for the treatment of capillary diseases.