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It is beneficial when exposed to fire.
Acrid, sweet, excessively warm, slightly toxic. Enters the Qi level of the Foot-Yangming Meridian. It can guide the medicinal effect upward. It expels wind-phlegm and dispels cold-dampness. It is highly effective in dissipating and resolving all kinds of diseases of the head and face, heart pain and blood bi (blood stasis syndrome), damp itching of the scrotum, acute and chronic convulsive disorders (Jing Feng), and cases where the limbs and face fail to rise due to unresolved wind-cold in smallpox/variolae. When combined with Tianxing (Arisaema Cum Bile) and Banxia (Pinellia Rhizome), ground raw and formed into pills with pig bile, it treats pediatric summerheat wind-phlegm confusion and convulsions. Combined with Jiangcan (Bombyx Batryticatus) and Quanxie (Scorpio), ground raw in equal parts into powder, taken with hot wine, it treats facial paralysis (stroke with mouth deviation). Combined with Huoxiang (Agastache Herba), powdered in equal parts, taken with rice water, it treats persistent vomiting in children. Use after processing. Contraindicated in slow convulsive disorders due to Spleen deficiency and stroke due to Yin deficiency.

Also known as Huzhang (Tiger Palm).
Beneficial when exposed to fire or ox bile. Shuqi (Perilla Leaf) acts as its guiding herb. It is inhibited by Fuzi (Aconite Lateral Root), Ganjiang (Dried Ginger), Fangfeng (Saposhnikovia Root), and Shengjiang (Fresh Ginger). It is antagonistic to Mangcao (Genkwa Flower). Its toxicity can be subdued by Xionghuang (Realgar), Dansha (Cinnabar), and Yanxiao (Saltpeter).
Acrid, bitter, warm. Toxic. Enters the Hand-Taiyin and Foot-Taiyin Meridians. It governs the stagnation of wind-phlegm (Banxia travels through the intestines and stomach, whereas Tianxing travels through the meridians). It dispels numbness in the four limbs. It disperses blood and attacks accumulations, directs Qi downward, and induces abortion. Applied externally for tinea, sores, ulcers, and snake bites/injuries. Combined with Fangfeng, it treats numbness. Combined with Chuanbai (Phellodendron Bark), it directs the action downward. Combined with Cangzhu (Atractylodes Rhizome) and Shengjiang, it treats arm pain due to phlegm-dampness. Combined with Jingjie (Schizonepeta Spike) and ginger juice, it treats headache due to wind-phlegm. Combined with Shichangpu (Acorus Rhizome), applied topically, it treats oral and lingual ulceration. Assisted by Tianma (Gastrodia Rhizome), it treats vomiting, diarrhea, and convulsions. As the sovereign herb combined with Hupo (Amber) and Zhusha (Cinnabar), it clears phlegm confusing the mind orifices. Combined with Bingpian (Borneol), in equal parts, prepared at noon on the fifth day of the fifth lunar month, rubbed onto the teeth on both sides with a finger, it opens the jaw lock, closed eyes, and unconsciousness in critical stroke patients who cannot take medicine.
Soak in Alum Decoction or Gleditsia Sinensis Juice for three days and nights, dry in the sun, then soak in wine for one night, steam until the numbing sensation ceases; or wrap in ginger residue and yellow clay, bake until cooked, remove the clay, and roast for use. Processing with fire eliminates its toxicity. Contraindicated in deficiency-phlegm and dry-phlegm.
Method for preparing Nanxing Qu (Southern Arisaema Fermented Cake): Mix Nanxing powder with ginger juice and alum decoction to form small cakes, place them in a basket, cover with Cecropia leaves, wait for yellow mold to grow, then take out, dry, and store.
Method for preparing Danxing (Ox Gallstone Arisaema): Grind raw Nanxing into powder, obtain yellow bull gallbladder juice in the twelfth lunar month, mix evenly, insert into the gallbladder, and hang in a ventilated place to dry. The older, the better.
Although it is said that Nanxing primarily treats phlegm and Banxia primarily treats dampness, when damp-phlegm runs rampant in the meridians, causing obstruction, leading to difficulty in speech and soreness/pain in the body and limbs, only Nanxing can, in combination with other herbs, open up and guide the phlegm, thereby instantly eliminating the dampness. In cases where dampness generates fire, and fire generates phlegm, with phlegm-fire clashing to create wind-like symptoms such as facial deviation and limb paralysis, appearing in various syndromes, only Banxia can, from the perspective of clearing heat and fire agents, descend the dampness, thereby transforming all wind-phlegm. Ultimately, it depends on the appropriate application by the practitioner.