Dyers Woad Root Classic Formulas … Natural Herb Library

Primary Actions

Clears heat and resolves toxin ... Ban Lan Gen is one of the best-known root medicines for hot toxic sore throat, epidemic heat, and inflammatory upper-respiratory presentations.
Cools the blood ... traditional use extends to febrile diseases with heat entering the blood level, rash, agitation, and toxic heat with swelling.
Benefits the throat and reduces swelling ... painful red throat, swollen tonsils, and heat-toxic neck or glandular swelling are among its most familiar applications.

Ban Lan Gen granule and related throat-clearing patent-medicine traditions ... modern continuation of its heat-toxic sore-throat role.
Qing Wen Jie Du formula lineages ... epidemic-heat and throat-toxin contexts where Ban Lan Gen supports heat-clearing and detoxification.
Ban Lan Gen with Da Qing Ye and Qing Dai ... classic blue-herb family strategy for hot inflammatory throat and epidemic patterns.

Traditional herbology treats Ban Lan Gen as bitter and cold, entering the Heart and Stomach to clear heat, resolve toxin, cool the blood, and benefit the throat.
The root and leaf are related but not identical medicinal lanes, which is why keeping Ban Lan Gen distinct from Da Qing Ye improves editorial accuracy.