Qing Dai 青黛 Indigo Naturalis

English Name: indigo, natural indigo
Property: salty, cold
Channel: LR, LU, ST
Part used: natural indigo powder extracted from the branch and leaf of Isatis tinctoria L
Dosage: 1.5-3g (0.6-1g in powder)


1. Clears heat, eliminates toxins: convulsions, Lu heat, eczema, oral ulcers
2. Cools blood, disperses stagnation, reduce swelling: bleeding, mumps, sore throat

Contraindications: ST deficient-cold. Overdose causes nausea, vomiting, abdominal pain, diarrhea. Topical application may cause allergic reactions.

Note: Patients who are allergic to sulfonylureas and sulfonamides may also be allergic to
Da Qing Ye, Ban Lan Gen, Qing Dai




Herbology (TCM) Chinese Medicine