Chief herbs in Shao Yao Tang?

• A. Huang Lian & Huang Qin
• B. Huang Lian
• C. Huang Qin
• D. Bai Zhu

Answer: (A)

In this formula, the main action is interior heat-dampness clearance, and the chief herbs are the ones that drive that direction. Huang Lian and Huang Qin together provide the strongest and most direct heat-clearing and dampness-draining effect inside the body, shaping the formula’s overall therapeutic reach. Huang Lian clears heat and dries dampness with a focus on the interior, while Huang Qin complements with additional heat-clearing and damp-drying while helping to vent heat from the upper regions. This pairing establishes the formula’s core therapeutic thrust, so the other ingredients can function as supporters without shifting the primary pattern being treated. Using only one of these herbs would weaken the interior heat-clearing action, and options that are primarily tonifying or that address dampness with less emphasis on heat do not set the same core direction.