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.
Removing water retention,
subduing swelling and masses.
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).
For furuncles and carbuncles, powder of kansui root
is used externally on affected part or by oral application
for clearing heat and detoxication.
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.
The herb should not be used for pregnant women and weak
patients. It is antagonistic to liquorice (Radix
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