The effects of 30 years old tangerine peel and common tangerine peel are the same, both of them have the effects of regulating qi, strengthening the spleen, drying dampness and resolving phlegm (expelling dampness and resolving phlegm evils by drying dampness), and 30 years old tangerine peel is milder than common tangerine peel in terms of medicinal properties.
Chenpi is pungent, bitter and warm in nature, belonging to the spleen and lung meridians, with the effect of regulating qi, strengthening the spleen, drying dampness and resolving phlegm, it can be used for the treatment of stagnation of qi in the spleen and stomach, blandness and tastelessness, loss of appetite, stuffiness and distension of the stomach and epigastrium, and coughing with excessive phlegm.
The Compendium of Materia Medica states: “Other medicines are expensive and new, but this (Chenpi) is expensive and old”. The quality of Chenpi is superior when it is aged for a long time, with moderate odor, not steep and warm, but not dry and strong.
The adverse reactions and contraindications of Chen Pi are not clear. If you need to use Chen Pi to treat disease, it is recommended to use under the guidance of a physician, do not take drugs blindly.