The efficacy of water caltrop and calamus is different from the main treatment and meridian. 1. Acorus calamus: its flavor is pungent, bitter, warm, and enters the heart, liver and stomach meridians. It has the functions of resolving phlegm and opening the orifices (opening the orifices of the heart and restoring the mind by removing phlegm), removing dampness and strengthening the stomach, killing insects and relieving itching. It is clinically used in the treatment of epilepsy, stroke coma, amnesia, tinnitus and deafness, abdominal pain and diarrhea, rheumatism pain and eczema. Yin deficiency and hyperactivity, sweating, sperm slippery people should be cautious. 2. Calamus: as an opener, warm, pungent, bitter flavor, attributed to the heart, stomach meridian. It can open the orifices, expel phlegm, awaken the mind and enlighten the intellect, dissolve dampness and open the stomach (by removing dampness, it can normalize gastrointestinal function). It is often used in the treatment of epilepsy, forgetfulness and insomnia, tinnitus and deafness, and epigastric plumpness and lack of hunger (fullness in the abdomen and no sense of hunger). Caution should be exercised if there is deficiency of yin and hyperactivity of yang, excessive sweating and slippery semen. Calamus and Acorus calamus are two different kinds of Chinese medicines and should be used under the guidance of a professional Chinese medicine practitioner to avoid delays.