The main component of Lindera root is aconitine. Lindera root is generally dark brown and looks like water chestnut and ginger. It contains aconitine toxic components, and if it is not cooked well, it is difficult for the virus to be discharged. First of all, boil medicine slowly with boiling water, not cold water; Boil over slow fire for more than ten hours and cook thoroughly. It is best not to drink cold water when taking it. I hope I can help you! !