Kansui Root (gan sui)
Radix Euphorbia Kansui
Properties:
Bitter and
sweet in flavour, cold in nature, being poisonous, it
acts on the lung, kidney and large intestine channels.
Bitter and cold for purging, lowering and sinking,
clearing the five and eliminating the water and fluid,
inducing serious diarrhea and diuresis, the herb can
release the pathogens from water drinking by excretion
of urine and stools. As the herb is violent in action,
toxic and tend to harm genuine Qi, it is only suitable
for patients with edema and ascites due to excess
syndrome. The herb is used externally to eliminate edema
and dissolve lumps in treating furuncles and carbuncles.
Effects:
Removing water retention,
subduing swelling and masses.
Indications:
1.
For edema and ascites, constipation
and difficulty in micturition caused by excess of Yang,
the herb is often used in combination with knoxia root
(Radix Knoxiae), rhubarb (Radix et Rhizoma Rhei) and
areca seed (Semen Arecae) to bring about serious
diarrhea, as in Pill for Relieving Ascites. (Zhou Che
Wan). For patients with hydrothorax costal pain, dyspnea,
constipation and difficulty in micturition, knoxia root,
genkwa flower (Flos Genkwa) and Chinese date are used in
combination (powders or decoction), as in Ten Jujube
Decoction (Shi Zao Tang).
2.
For furuncles and carbuncles, powder
of kansui root is used externally on affected part or by
oral application for clearing heat and detoxication.
Dosage and Administration:
The ingredients of the herb do not dissolve in water, so
it is better to use the herb in bolus and powder 0.5-1g
each time. Vinegar preparation may decrease may decrease
its toxicity. In general the herb is often used
externally.
Precautions:
The herb should not be used for pregnant women and weak
patients. It is antagonistic to liquorice (Radix
Glycyrrhizae).
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