What is the formula for Xiao Chai Hu Tang?

Typically, the classic Xiao Chai Hu Tang (Minor Bupleurum Decoction) formula consists of seven herbal ingredients: Bupleurum (Chai Hu), Scutellaria (Huang Qin), Ginseng (Ren Shen), Pinellia (Ban Xia), Fried Licorice (Zhi Gan Cao), Ginger (Sheng Jiang), and Jujube (Da Zao). If in doubt, it is advisable to consult a healthcare professional in advance. Detailed analysis is as follows:

In this formula, Bupleurum serves as the principal herb to resolve pathogenic factors in the Shaoyang system and regulate qi flow; Scutellaria acts as the deputy herb to clear heat from the Shaoyang region, and when combined with Bupleurum, enhances its heat-clearing effect. Ginseng and fried licorice strengthen qi and benefit the spleen; Pinellia reverses rebellious stomach qi and stops vomiting; Ginger and jujube harmonize the spleen and stomach while supporting healthy qi. Together, these herbs synergistically achieve the therapeutic effect of resolving Shaoyang disharmony.

The formulation is rationally composed with balanced properties, effectively combining heat-clearing actions with supportive tonification. It is suitable for symptoms caused by Shaoyang pattern, such as alternating chills and fever, bitter taste in the mouth, dry throat, and fullness or distension in the chest and hypochondrium. It is a commonly used classical prescription in clinical TCM practice for managing exogenous febrile diseases.

Xiao Chai Hu Tang should be used according to proper pattern differentiation. Dosages of the herbs must be adjusted based on individual constitution and specific symptoms. Self-prescribing and self-administration are not recommended. It is advised to use this formula under the guidance of a qualified TCM practitioner to avoid potential adverse effects due to incorrect application.