The correct drug name of Acorus calamus is Acorus ninety-segmented, which has the effect of opening the orifices, removing phlegm, awakening the spleen and tranquilizing the mind, and is used for treating heat illnesses, epilepsy, tinnitus and deafness, chest tightness and abdominal distension, and loss of appetite. Calamus is the dried rhizome of Altair’s silver lotus in the buttercup family. Its flavor is pungent, warm, to the heart, liver, spleen meridian, with the opening of phlegm, wake up the spleen and tranquilize the efficacy of the fever, epilepsy, tinnitus and deafness, chest congestion and abdominal distension, loss of appetite, external treatment of carbuncle gangrene (a kind of venomous sores, occurring in the surface of the body, the limbs, the internal organs of the acute suppurative disease) sores and ringworm. Nine section calamus adverse reactions and contraindications are not clear. Caution should be exercised in cases of yin deficiency and hyperactivity (deficiency of yin fluid and hyperactivity of yang qi), irritability and sweating, and seminal slippage. If there is a need for medication, it is recommended that it be used under the guidance of a professional physician, not blindly self-medication.