Poria cocos is sweet in taste, flat in nature, and enters the heart, lungs and spleen meridians. Has the effects of eliminating dampness, promoting diuresis, invigorating spleen, regulating stomach, calming heart and tranquilizing mind. Can be used for treating dysuria, edema, excessive phlegm, cough, vomiting, anorexia, diarrhea, nocturnal emission, stranguria, fright, amnesia, etc. The diuretic effect of Poria cocos is achieved by strengthening the spleen and tonifying the lung, which is different from other traditional Chinese medicines. Gui Ling Shugan Decoction, Sijunzi Decoction and Sini Decoction are all commonly used prescription of poria cocos.