The difference between Wu Ling San and Poria Tang is mainly reflected in the composition of the drug and the efficacy of the main treatment. 1. Drug composition. Wu Ling San is composed of poria, zedoary, atractylodes, cinnamon sticks, poria, while poria soup is composed of poria, poria, zedoary, gelatin, talcum. 2. The main efficacy is different. Wu Ling San has the efficacy of inducing diuresis and seepage of dampness (promoting the operation of water to get rid of dampness), warming yang and transforming qi (warming yang qi in the body). It can treat the diseases caused by Yang Qi not being transformed, such as urinary incontinence, heartburn and thirst, edema, and diarrhea, etc. Poria Tang has the efficacy of clearing away heat and nourishing yin, inducing drainage and seeping dampness, and treating the diseases caused by water-heat and mutual injury to yin, such as fever, thirst, heartburn and insomnia (symptoms of heartburn and insomnia), and astringent and painful urination. The above is the difference between Wu Ling San and Poria Tang, the specific use of drugs need to consult a professional doctor’s advice.