Calamus ranges from 30 to 90 yuan per catty, and its pricing is related to factors such as origin, specifications, local prices, etc., and cannot be generalized. Acorus calamus has the effect of opening the orifices to open the phlegm, waking up the spirit and wisdom, transforming dampness to open the stomach (through the elimination of dampness to make the gastrointestinal function normal), applicable to the phlegm, dampness, filthiness and obscurantism caused by obscuring the orifices of the heart of the confusion, the tongue is strong and inarticulate, etc.; can also be used for dampness obstruction in the middle Jiao (dampness impedes the function of the spleen and stomach) evidence, symptoms of the epigastric rumpus (stomach distension and discomfort), do not think of food and drink, etc.. It should be noted that calamus is warm in nature, where the external wind-cold or warm heat, heat and solid internal blazing, yin deficiency and fire (deficiency of yin essence in the body, the emergence of deficiency and hyperactive fire), blood deficiency and blood heat, etc., avoid taking a single flavor. Drugs should be purchased in regular pharmacies or hospitals, and used under the guidance of a doctor, do not blindly use drugs on your own, so as not to cause adverse consequences.