Herbs that Regulate Qi

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What caution should be kept in mind when using Herbs that Regulate the Qi?
Herbs that Regulate the Qi are warm, aromatic, and acrid. They are very drying in nature. Use caution with yin deficiency. Also, they disperse qi, so use caution in qi deficiency as well.

Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 510 [Q867]