Herbs that Clear Heat

What special cooking instruction should be followed when using Qing Hao (artemisiae annuae herba) in decoction?

Qing Hao is aromatic, so it should not be subjected to prolonged cooking.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 219-220 [Q541]