The root is a pungent, very bitter, cooling herb that controls bacterial and viral infections, relaxes spasms, lowers fevers and stimulates the circulation. It is locally analgesic and anaesthetic and is used in Chinese medicine as a general panacea with alterative, ophthalmic and pectoral activity. The root contains several compounds that are effective in inhibiting various bacteria and they are a safe and effective treatment for many ailments, such as some forms of dysentery, that are caused by bacteria.