1, improve capillaries. Rutin can improve the function of capillaries, maintain the normal resistance of capillaries, and prevent bleeding, hypertension and diabetes caused by excessive fragility and permeability of capillaries.

2. Treat hematochezia. Therefore, Sophora japonica is often used as a common medicine to treat hematochezia, which is used for hemorrhoid bleeding, hematochezia, bloody dysentery and hematemesis and epistaxis caused by blood heat. Generally, it is decoction, 10 15g, which is suitable for external use. Use with caution for people with spleen and stomach weakness and fever due to yin deficiency.

3. The role of cardiovascular system. Sophora japonica L. liquid has a slight exciting effect on isolated frog heart and a blocking effect on cardiac conduction system. Rutin, quercetin and quercitrin can also increase the contraction and output of frog hearts in vitro and in vivo and slow down the heart rate. Quercetin can dilate coronary vessels and improve myocardial circulation. Rutin can contract the blood vessels of toad's lower limbs and rabbit's ear.

4, the role of blood lipids. Quercetin can effectively reduce the cholesterol content in liver, aorta and blood, increase the stability of cholesterol-protein complex, and prevent and treat experimental arteriosclerosis.