In the formula of Erchen Decoction, Pinellia ternata has the effects of eliminating dampness and resolving phlegm, regulating stomach and stopping vomiting, and Juhong is good at regulating qi and resolving phlegm, so that the qi can be smooth and the phlegm can be reduced, Poria can strengthen the spleen and ooze dampness, and licorice and middle energizer can benefit the spleen. Together with ebony, these ingredients can effectively treat phlegm-dampness diseases.

Erchen decoction is a commonly used traditional Chinese medicine prescription, which is mainly used to treat phlegm-dampness resistance, spleen-stomach disharmony, chest and diaphragm fullness, vomiting and nausea, dizziness and palpitation, or cough with excessive phlegm. The addition of dark plum is a very important finishing touch.