Bo Ye Da Huang (Radix et Rhizoma Rhei Undulati)
The drug is the dried root and rhizome of Rheum undulatum L. (family Polygonaceae), growing in grassland on mountain slopes, and distributed chiefly in Qinhai, Gansu, Shaanxi of China.
The Effect of Radix et Rhizoma Rhei Undulati
Bitter, cold; stomach and large intestine meridians entered.
It is used as purgative for the treatment of constipation of heat type, jaundice due to heat and dampness, sores, carbuncles, burns and scalds.
Dosage and Administrations
Decoct 3~10 g, or made into powder for oral taking. Proper dosage is for external application, pounded for applying.
It is contraindicated to pregnant women and the weak.