Downward-Draining Herbs (Intro)
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Besides purging the Large Intestine, what is another important function of Da Huang (rhei radix et rhizoma)?
Da Huang strongly invigorates blood. It can be internally for fixed abdominal masses or fixed pain; and it can be used externally in cases of injury and trauma.
Source: Bensky, D. (2004). Chinese Herbal Medicine: Materia Medica. Seattle, WA: Eastland Press. pp. 236-237 [Q544]