In Bai Hu Tang, which herb is dosed at 6g?

• A. Shi Gao 30-90
• B. Zhi Gan Cao 6g
• C. Zhi Mu 9-15
• D. Jing Mi 9-15

Answer: (B)

In this formula, the amounts reflect each herb’s role: the strong heat-clearing herb is given a large dose to decisively clear heat, while the harmonizing herb is given a smaller dose to smooth the combination and protect the stomach. Shi Gao is the chief heat-clearing ingredient and is used in a high amount to drive out heat and generate fluids. The other heat-clearing and harmonizing ingredients are used in moderate amounts to balance the formula and support the patient’s needs, such as nourishing yin or easing dryness. Licorice, added in a smaller amount, serves to harmonize the entire prescription, soften the harshness of the heat-clearing herbs, and help the middle jiao accept the formula. Therefore, the herb dosed at 6 g is Zhi Gan Cao (licorice), which plays this harmonizing role.