The dried roots of Scrophulariaceae are commonly used traditional Chinese medicines, which are slightly cold in nature and sweet, bitter and salty in taste. It has the effect of cooling blood and nourishing yin, purging fire and detoxification. It is used for symptoms such as fever injury of yin, crimson tongue polydipsia, warm toxin spotting, fluid injury constipation, bone steaming and fatigue, red eyes, sore throat, scrofula, diphtheria, carbuncle, swollen sore, etc.