Prepared Arisaema Rhizome Classic Formulas … Natural Herb Library

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Dries dampness and transforms cold-damp or stubborn phlegm ... Zhi Nan Xing is the processed internal-use Arisaema used when thick obstructive phlegm needs a stronger drying herb than Ban Xia.
Dispels wind-phlegm and opens the channels ... it is used for facial paralysis, numbness, dizziness, and channel obstruction when phlegm blocks the collaterals.
Stops spasms and addresses phlegm-obstructed seizures ... traditional use extends to epilepsy or convulsive disorders in which turbid phlegm clouds the clear orifices.

Dao Tan Tang (导痰汤) ... classic stubborn-phlegm formula in which Tian Nan Xing lineage material helps dry dampness and break up obstructive phlegm.
Qing Zhou Bai Wan Zi (青州白丸子) ... famous wind-phlegm channel-obstruction formula using Nan Xing for numbness and facial deviation.
Wu Xian Wan (五痫丸) ... seizure formula lineage in which Nan Xing helps address phlegm closing the clear orifices.

Traditional references describe processed Nan Xing as bitter, acrid, warm, and toxic, entering the Lung, Liver, and Spleen to dry dampness, resolve phlegm, extinguish wind, and reduce swelling.
Paozhi is clinically decisive here ... correct internal-use processing materially reduces toxicity and changes how the herb can be prescribed.
PREPARATION NOTE: this page exists to preserve the processed Zhi Nan Xing lane and should not be collapsed into raw Sheng Nan Xing.