The root of Euphorbia pekinensis Rupr., family Euphorbiaceae or Knoxia
valerianoides Thorel et Pitard, family Rubiaceae
1. E. pekinensis: Root terete, with an enlarged root stock, 10-20 cm long
and 2-4 cm in diameter. Superficial cork brown, obviously wrinkled, with
fibrous roots or scars. Section yellow-white and fibrous.
2. K. valerianoides: Root somewhat fusiform, 3-10 cm long and 0.5-1.0
cm in diameter. Superficial cork brown-red to brown, twisted, wrinkled
and coarse. Section yellow-white, sticky when wetted. Bitter in taste,
cold in nature, toxic, and attributive to lung, kidney and large intestine
1. purge and eliminate the retention of phlegm: For sthehiasyndrome with
hydrothorax, ascites, edema and retention of phlegm, used together with
Radix Euphorbiae Kansui and Flos Genkwa; for epilepsy attributive to retention
of phlegm in the heart, used together with Euphorbiae Kansul and Semen
2. Purge heat and relax the bowels: For sthenia-heat syndrome with constipation.
Relieve swelling and disperse the lumps: External use for skin nodules,
scrofula and skin infection.
1. Purgative. Its hot water extract is more potent than its ether extract.
2. Dilating the terminal blood vessels and antagonising the hypertensive
effect of adrenaline.
Powder: 1g 1-3 times daily.
This medicine may cause nausea and vomiting, and should be contraindicated
for pregnant women, patients with cardiac failure and general debility.