A. Edema, tympanites and hydrothorax
It has a similar but less drastic action than that of Gan Sui, and commonly indicated for edema, tympanites and hydrothorax without deficiency of original qi. It is often combined with Gan Sui and Yuan Hua, as in Shi Zao Tang from Shang Han Lun.
B. Sores and abscess
It has the action of relieving swelling and dissipating nodulation when being used topically. For sores and abscess due to heat-toxin, the fresh root can be applied externally after pounded, or used in combination with the herbs of removing toxicity, curing abscess, and dissipating nodulation.
Dosage and Administrations
0.5～1g used in pills or powder for each time. Proper dosage is for topical administration. It should be processed with vinegar to weaken its toxins when taking orally.
It is contraindicated to pregnancy and valetudinarian, and antagonistic to Gan Cao.
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