The main effects of Si Shen Tang are to clear heat and calm the mind, to strengthen the spleen and dispel dampness, and to nourish the stomach, treating heart trouble and indigestion caused by spleen deficiency. Si Shen Tang is composed of four ingredients of the same medicinal origin: yam, poria, lotus seeds and gorgonians. Poria can promote the flow of water and dampness, yam can strengthen the spleen and lung, and gorgonian can promote dampness and strengthen the middle. Therefore, using Si Shen Tang can enhance the function of the spleen and stomach in transporting water and dampness, which is ideal for patients with dampness and heat in the spleen and stomach, spleen deficiency with little food, bad breath and acne. It is the best remedy for the elderly and children with loss of appetite. But then again, no medicine is a panacea, and Sishen Tang has its contraindications, for example, it is not suitable for people with Yin deficiency and internal heat, and it is also not suitable for women during their physiological period.