四逆散源于《伤寒论》,是仲景为“少阳病,四逆,其人或咳,或悸,或小便不利,或腹中痛,或泄利下重”[1]而设。方由柴胡、枳实、芍药、甘草组成。柴胡与芍药一升散一收敛,可使柴胡升散而无耗伤阴血之弊,芍药收敛而无敛邪留寇之虑,柴胡与枳实为伍,一升一降,令气机升降条达,并奏升清降浊之效,枳实与白芍相配,一入气分,一入血分,故能理气和血,而芍药与甘草有缓急止痛之能,若从脏腑角度来看,柴胡、芍药入肝胆经,枳实、甘草 Sinisan originated from the “Treatise on Febrile Diseases.” Zhongjing is a “Shaoyang disease, and four inverses, whose person or cough, or sputum, or urine is unfavorable, or abdominal pain, or loss under the weight of ”[1] And setting. The party consists of Chaihu, Citrus aurantium, peony, and licorice. The combination of Bupleurum and peony in one litre breaks up and makes the Chaihu diffuse without harming the blood-sprouts of Yin-Yin. Concerning the convergence of the expectorant drug, there is no fear of concentrating the evil. The Chaihu and the Fructus Cialis are united in one litre and one drop. The machine lifts up and down, and plays up the effect of clearing and descending turbidity. It is compatible with the white peony. Once it enters the gas, it enters the blood, so it can qi and blood, and the peony and licorice have the ability to relieve pain and pain. From the point of view, Bupleurum, peony into the liver gallbladder, turmeric, licorice