The proprietary Chinese medicine for Er Chen Tang is Er Chen Wan. Er Chen Pills is composed of Chen Pi, Pinellia, Poria and other traditional Chinese medicines, with the effects of regulating qi and harmonizing the stomach, drying dampness and resolving phlegm (removing phlegm in the body by drying dampness); it is used for phlegm-dampness stagnation resulting in phlegm-phlegm-heavy coughs, tightness in the chest, gastric and epigastric congestion and discomfort, and nausea with desire to vomit, etc.. It is not suitable for people with dry cough caused by lung yin deficiency; it is not suitable to take tonic Chinese medicine during the period of taking the medicine, and avoid spicy, cold and greasy food. Er Chen Tang is more complicated to decoct, but easier to be absorbed than pills; pills are easy to carry and take directly with warm water. It is recommended that patients choose the appropriate medication under the guidance of a physician, do not blindly use medication on your own, so as not to cause adverse consequences.