Fritillaria thunbergii is the dried bulb of Fritillaria thunbergii in Liliaceae. Fritillaria thunbergii tastes bitter and belongs to cold medicine. Return to lung meridian and heart meridian. Fritillaria thunbergii mainly contains sterol alkaloids, saponins, starch and other components. Among them, alkaloids and saponins are the main components People's Republic of China (PRC) Pharmacopoeia (20 15 edition) stipulates that the total content of peimine A and peimine B in dried Fritillaria thunbergii should not be less than 0.080%.