Wu Pi San is composed of Sang Bai Pi, Poria Poria, Ginger Pi, Chen Pi and Dabu Pi.
The original formula of Wu Pi San is from “Zhong Zang Jing”. The function of this formula is to diuretic water and eliminate swelling, regulate Qi and strengthen the spleen. It can be used to treat water-stagnation and qi stagnation of Pi Shui (edema with generalized swelling, low urine output and abdominal distension as the main manifestation), which is characterized by generalized edema, distension and fullness of the heart and abdomen, shortness of breath, heaviness of the limbs, dysuria, edema in pregnancy, etc. The formula includes Poria Pi, which can strengthen the spleen.
In this formula, Poria bark can strengthen the spleen and seep away dampness, diuretic and eliminate edema; Dahu Pi can move Qi and eliminate flatulence, diuretic and eliminate edema; Chen Pi can regulate Qi and harmonize the stomach, wake up the spleen and dissolve dampness; Ginger Pi can dissipate the water between the skin in order to eliminate edema; Mulberry White Pi can purify and reduce the Lung Qi in order to regulate the water channel. The combination of all the medicines together, the effect of diuresis to eliminate swelling, regulate qi and strengthen the spleen.
The adverse effects and contraindications of Wu Pi San are not clear. Before taking this formula, it is necessary to consult a traditional Chinese medicine practitioner for diagnosis and use it under the guidance of a doctor.