Roots and rhizomesPhlegm-resolvingArisaematis Rhizoma Praeparatum

Zhi Tian Nan Xing (Processed Jack-in-the-pulpit Rhizome)

A practical guide to Zhi Tian Nan Xing: what it is, how Traditional Chinese Medicine uses it, the classical formulas it appears in, and who should be careful with it.

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Last reviewed Oct 29, 2026

Quick Facts

Latin Name	Arisaematis Rhizoma Praeparatum
Chinese Name & Pinyin	製天南星 · Zhi Tian Nan Xing
Medicinal Part	Roots and rhizomes
The item	Zhi Tian Nan Xing is the alum-ginger processed root tuber of the jack-in-the-pulpit plant. Ban Xia (pinellia) and the look-alike arum-family tubers are not this drug.
Nature and channels	Warm, acrid, bitter. Enters the Lung, Liver, and Spleen. Warm acrid bitter dries damp and resolves phlegm, expels wind, and stops spasms.
Pharmacopoeia line	Dries damp and resolves phlegm; expels wind and stops spasms. Used for damp-phlegm blockage and wind-phlegm cramping.
Pattern cues	Cough with much white sticky phlegm. Chest tightness. Heavy tired limbs. White greasy tongue coat. Dizziness. Numb limbs. Infantile fright wind. Cramping.
In this article	Zhi Tian Nan Xing versus Ban Xia. Expelling wind and stopping spasms versus lowering qi and stopping vomiting. Why yin-deficiency dry cough should skip it. Home tea.

What Is Zhi Tian Nan Xing?

Zhi Tian Nan Xing (制天南星; Zhì Tiān Nán Xīng; Latin: Arisaematis Rhizoma Praeparatum; English: processed jack-in-the-pulpit rhizome) is the root tuber of a broad-leafed arum-family herb, processed with alum and ginger until its toxicity is greatly lowered — the small pale-brown slices that appear in phlegm-clearing formulas of old medical books. It is warm, acrid and bitter, enters the Lung, Liver, and Spleen channels, and its core actions are to dry damp and resolve phlegm, and to expel wind and stop spasms. It is the mover for sticky phlegm and wind-phlegm cramping. The usual amount is 3–9 g in a decoction, with far smaller amounts in home teas. Soak the pieces 30 minutes before cooking — no special first, last, or wrapped step. It is a toxic medicinal piece — the raw form is never used at home.

It is not Ban Xia. Pinellia is also warm and acrid — it dries damp and phlegm and lowers the qi to stop vomiting, better for stomach-phlegm nausea; this processed arisaema rhizome is warm, acrid, and bitter — it dries damp and phlegm and expels wind to stop spasms, better for channel-phlegm and wind-phlegm cramping. It is not a general phlegm or tonic herb; it acts within clear patterns. In yin-deficiency dry cough — dry cough with scanty sputum, a dry mouth — or in blood-deficiency wind, using it on your own is a poor match. A violent spasm, a stiff jaw, or a child who is markedly unwell needs a clinic first. Do not take it yourself for a long time.

It is used most often for three patterns:

Damp-phlegm blockage — cough with much white sticky phlegm, chest tightness and stuffiness, heavy tired limbs, a white greasy tongue coat
Wind-phlegm stirring — dizziness and blurred vision, numb limbs, infantile fright wind, epileptic-type cramping — seek care
Yin-deficiency dry cough, pregnancy, or nursing — seek care / skip it

Warm, acrid, bitter, and warm-drying, it is not a daily "phlegm-clearing tea" to keep drinking. Drying when there is no damp-phlegm, or in a yin-deficient body, burns the fluids instead of helping.

When rich food, long sitting, and blocked qi pile up damp-phlegm — the chest feels tight, the cough brings sticky phlegm, the limbs feel heavy — or wind stirs the phlegm upward with dizziness and cramping — the body needs a firm but precise dry-and-disperse rather than a gentle tonic. Zhi Tian Nan Xing is warm, acrid, and bitter. It dries the damp, resolves the phlegm, and expels wind to stop the spasms, which is why it appears in Yu Zhen San (True Jade Powder)–type formulas. It dries more than it holds. In yin-deficiency dry cough, or without damp-phlegm and wind, more makes it worse.

Zhi Tian Nan Xing is not a catch-all phlegm or wind herb. In yin-deficiency dry cough, in pregnancy, in nursing, or without damp-phlegm and wind, using it alone is a poor match. Whether it belongs in a formula, and at what dose, should be decided by a licensed Chinese medicine practitioner after pattern diagnosis.

Zhi Tian Nan Xing: Materia Medica Profile

Identification & Quality Standard

Arisaematis Rhizoma Praeparatum

Botanical Origin

The processed tuber of Arisaema heterophyllum Blume, Arisaema amurense Maxim. or Arisaema erubescens (Wall.) Schott (Araceae).

Production Regions

Primarily produced in the Chinese provinces of Henan, Hebei, Sichuan, Anhui, Hubei, Shandong.

Quality Requirements

Superior medicinal material is white, hard, starchy, without numbness after processing.

Macroscopic Features

Flat spherical slices, 1.5~6cm diameter, 0.5~2cm thick. Externally yellowish-white or brownish-yellow, smooth, horny; cut surface is white or pale yellow, starchy or horny. Hard. Faint odor, taste pungent, slightly numb.

Main Regions and Quality Identification

Classic texts and trade experience favor tubers from several provinces, but quality still depends on variety, harvest time, processing, and storage. Zhi Tian Nan Xing shows a round or irregular thin slice, pale yellow-brown on the surface, hard and crisp, with a horny break, a faint acrid smell, and a numbing-spicy taste; the raw tuber is flat-spherical, pale yellow-brown, hard, with a white break, and a numbing spicy taste that stings the tongue. The common look-alike is Ban Xia — smaller, rounder, with only 3–5 leaflets — and the fake is often a tuber of another family, smaller with rootlet scars and a faint smell — so check by professional identification.

Traditional Properties & Historical Lineage

Nature, Flavour & Channel Tropism

Bitter, Acrid; Warm; ToxicLungLiverSpleen

1. Records in Classic Materia Medica

Shen Nong Ben Cao Jing: lists the arisaema in the lower class — "for heart pain, cold-heat, bound qi, accumulation, latent masses, sinew injury, withering, and cramping; frees the water passages."
Ming Yi Bie Lu: adds — "removes damp below the genitals and wind dizziness."
Xin Xiu Ben Cao: "is used for malaria, cold-heat, lowering the qi, and for metal wounds, fractures, and stasis blood; kills insects."
Ben Cao Gang Mu: "is used for fright convulsions, clenched jaw, throat blockage, mouth and tongue sores, scattering bound masses, and opening the fontanel."

These records center on drying damp, resolving phlegm, and expelling wind and stopping spasms — not modern disease concepts.

2. How Views of Its Nature Changed

Some doctors, like the De Pei Ben Cao authors, leaned on expelling wind and stopping spasms — for limb cramping from wind-phlegm; others stressed drying damp and resolving phlegm — for spleen-stomach damp-phlegm with a full distended abdomen; still others emphasized the toxicity — the dose must be tightly controlled and overuse avoided, keeping its scope limited to clear damp-phlegm and wind-phlegm signs — never a general tonic.

Core Efficacies & Traditional Applications

Traditional Functions

Dries dampness and resolves phlegm, expels wind and stops spasms, dissipates nodules and reduces swelling.

1. Main Use 1: Drying Damp and Resolving Phlegm

(1) Traditional action: through its warm nature, resolving the stagnant damp-phlegm and restoring the spleen-stomach transport. (2) Typical patterns: damp-phlegm blockage — cough with much white sticky phlegm, chest tightness and stuffiness, heavy tired limbs, a white greasy tongue coat. (3) Usual pairings: Chen Pi, Ban Xia, and Fu Ling to strengthen the damp-drying and phlegm-resolving; Zhi Shi and Hou Po to sort the qi and help the phlegm move out. (4) Not for self-use: yin-deficiency dry cough — the warm-dry nature may worsen the fluid loss.

2. Main Use 2: Expelling Wind and Stopping Spasms

(1) Traditional action: through its acrid-scattering nature, resolving the wind-stirred phlegm and easing limb cramping. (2) Typical patterns: wind-phlegm stirring — dizziness and blurred vision, numb limbs, infantile fright wind, epileptic-type cramping. (3) Usual pairings: Tian Ma, Quan Xie, and Jiang Can to strengthen the wind-expelling and spasm-stopping; for infantile fright wind, Gou Teng and Chan Tui to clear heat and settle wind. (4) Not for self-use: blood-deficiency wind — the warm-dry nature further damages the fluids and may worsen the wind signs.

3. A Classic Pairing

Zhi Tian Nan Xing pairs classically with Ban Xia: the arisaema warms and resolves the phlegm-damp of the channels and expels wind to stop spasms; the pinellia warms and resolves the phlegm-damp of the spleen-stomach and lowers the qi to stop vomiting — together they strengthen the damp-phlegm resolving while sorting both the channel and the stomach-spleen damp-phlegm, for damp-phlegm blockage with a tight chest, heavy limbs, and dizziness. This pair belongs to a practitioner's pattern diagnosis — never self-pair.

Modern Research

Modern research offers useful context, but Traditional Chinese Medicine prescribes on whole-pattern diagnosis rather than isolated compounds.

1. Main Chemical Constituents

Detected in the plant are triterpenoid saponins, alkaloids, flavonoids, polysaccharides, and organic acids. In vitro, some saponin constituents regulate respiratory-mucosa secretion; in animals, the processed extract at certain doses eases drug-induced limb cramping in mice. Human clinical research has no clear single-constituent efficacy conclusion yet.

2. Current Research Directions

Current work centers on the phlegm-resolving, calming, and anticonvulsant-type experimental effects — the processed piece keeps some respiratory-secretion-regulating activity while toxicity is lowered, and some extracts show a calming effect in animal models. These results come mostly from animals and still need human verification.

3. Limitations of Current Research

Lab results are not clinical efficacy — animal and in-vitro results cannot equal the effect in people.
Extracts are not decoction pieces — dose and preparation differ completely from the clinical piece.
Doses and preparations vary between studies — results are hard to compare.
One component does not define the whole herb — the piece acts as a team of constituents.

Comparing Similar Herbs

1. What They Share

Both dry damp and resolve phlegm.
Both are used for damp-phlegm blockage — cough with much phlegm and a stuffy abdomen.
Both need constitution and dose care — yin-deficiency dry cough needs caution.

2. Key Differences

Nature and flavor: Zhi Tian Nan Xing is warm, acrid, and bitter; Ban Xia is warm and acrid. Both are warm, but the arisaema's acrid-scattering is stronger while the pinellia's qi-lowering is more marked. Focus: the arisaema's center is expelling wind and stopping spasms — sorting the channel phlegm and easing limb cramping; the pinellia's center is lowering qi and stopping vomiting — sorting the stomach-spleen phlegm and easing nausea and a full distended stomach. Tendency: the arisaema scatters — sorting the stagnant qi of the channels and helping the wind and phlegm disperse; the pinellia descends — guiding the spleen-stomach qi downward and helping the phlegm settle. Best fit: the arisaema for wind-phlegm stirring — dizziness, numb limbs, infantile fright wind; the pinellia for damp-phlegm blockage — nausea and vomiting, a stuffy distended stomach, cough with much phlegm. Who should avoid: the arisaema — yin-deficiency dry cough and blood-deficiency wind; the pinellia — yin-deficiency dry cough and fluid loss with thirst. Both are warm-dry — pregnancy needs caution. Where you meet them: the arisaema in wind-phlegm formulas — such as infantile fright wind formulas; the pinellia in stomach-spleen damp-phlegm formulas — such as nausea-vomiting formulas.

3. One-Line Takeaway

In short, Zhi Tian Nan Xing expels wind, stops spasms, and sorts channel phlegm; Ban Xia lowers qi, stops vomiting, and sorts stomach-spleen phlegm. Both can serve damp-phlegm patterns — but they are not stand-ins for each other.

Classical Formulas Containing Zhi Tian Nan Xing

Classic Formula 1: Yu Zhen San

Role of this herb: in Yu Zhen San (True Jade Powder), Zhi Tian Nan Xing is the monarch — with Fang Feng, Bai Zhi, and Qiang Huo — for tetanus-type limb cramping and a clenched jaw after an open wound. The arisaema's wind-expelling and spasm-stopping resolves the wind-phlegm blocking the channels, and the partners strengthen the wind-expelling and channel-freeing. Alone, it cannot cover the wind-expelling and channel-freeing of the whole pattern. Traditional focus: tetanus — after a wound, a clenched jaw, arching rigidity, and cramping. Modern note: professional diagnosis and emergency care first — never self-apply by the name.

Classic Formula 2: Dao Tan Tang

Role of this herb: in Dao Tan Tang (Phlegm-Guiding Decoction), Zhi Tian Nan Xing is a supporting herb — with Ban Xia, Chen Pi, and Fu Ling — for damp-phlegm blockage with a tight chest and much phlegm. The arisaema strengthens the pinellia's phlegm-resolving, and the qi-sorting and spleen-strengthening partners restore the transport. Traditional focus: damp-phlegm blockage with qi stasis — a blocked chest, cough with much phlegm, a thick greasy tongue coat. Modern note: professional diagnosis first — never self-apply by the name.

Formula vs. Single Herb

A formula is a coordinated whole — the pairings let herbs work together toward an effect a single herb cannot reach. The common misunderstanding is that a herb that works in a formula will work the same way alone — in fact the single herb's effect is limited and cannot cover the multiple jobs of the formula. Do not self-formulate from web articles.

Diet & Daily Home Use

1. Home Tea (Under Guidance Only)

Zhi Tian Nan Xing is a medicinal piece — do not use it directly as an ordinary food; any home use is under a practitioner's guidance. For light chest tightness from damp-phlegm, a tea with tangerine peel may be used: Zhi Tian Nan Xing 1 g, Chen Pi 3 g — rinse, steep in boiling water, cover 10 minutes, drink. Fit: light damp-phlegm — chest tightness, cough with much phlegm. Not for: yin-deficiency dry cough, pregnancy, or children. Frequency: no more than 2 times a week.

2. Decoction and Processing Differences

The raw piece is markedly toxic — home use must use the processed Zhi Tian Nan Xing piece, never the raw form. The processed piece needs no special decocting — it can steep directly or cook with the other herbs, with no first, last, or wrapped step. At home, soak the pieces in clean water 30 minutes, then cook, taking 100–200 ml of the liquid each time. Different forms cannot be converted directly — 10 g of the piece cannot equal a patent-medicine dose; follow the prescription.

3. Dosage and How Long to Use

The classic range is 3–9 g; home use must stay tightly within the practitioner's advice. Food-remedy doses are halved and never for long continuous use — generally no more than 3 days at a time; special groups consult a practitioner or pharmacist.

Contraindications & Safety Warnings

1. Who Should Avoid It

Yin-deficiency dry cough — dry cough with scanty sputum, a dry throat and mouth, a red tongue with little coat — avoid; pregnancy and nursing — warm-dry and mildly toxic, be cautious; children and the elderly — weaker tolerance, use under a practitioner; liver or kidney impairment — lower metabolism, avoid; allergy to the arum family — avoid; people on anticoagulant or blood-pressure therapy — consult a doctor first.

2. Interactions and Diet Notes

Zhi Tian Nan Xing may interact with anticoagulant, blood-pressure, and sedative medicines, affecting absorption or metabolism — people on these should consult a doctor or pharmacist first. No blanket "food clash" between ordinary foods is established, but certain herbs may interact with specific medicines — consult a professional before self-pairing.

3. Side Effects and Overuse

Possible numb mouth and tongue, throat discomfort, nausea, or vomiting — usually from too large a dose or improper processing. Stop and seek care at once for marked discomfort, an allergic reaction, persistent vomiting, trouble breathing, confusion, or a rapid worsening of symptoms. The toxicity is dose-related — following the practitioner's advice strictly lowers the risk.

Frequently Asked Questions About Zhi Tian Nan Xing

What is Zhi Tiannanxing? Is it the same as raw Tiannanxing or Banxia?

Zhi Tiannanxing is the processed and prepared dried tuber of Arisaema erubescens, Arisaema heterophyllum or Arisaema amurense, Latin name Arisaematis Rhizoma Praeparatum. It is a common Chinese medicine centered on drying dampness and transforming phlegm, dispelling wind and stopping spasms, and dissipating binds and reducing swelling. Raw Tiannanxing dries dampness and transforms phlegm while reducing swelling. Banxia dries dampness and transforms phlegm while descending counterflow. They cannot be used interchangeably in equal amounts. Prescribe as Zhi Tiannanxing. Use with caution in pregnancy.

What are the composition and effects of Zhi Tiannanxing?

Pharmacopoeial name Zhi Tiannanxing, Latin Arisaema erubescens (Wall.) Schott., Arisaema heterophyllum Bl. or Arisaema amurense Maxim. Bitter and pungent in taste, warm in nature, toxic, enters the Lung, Liver and Spleen meridians. Functions to dry dampness and transform phlegm, dispel wind and stop spasms, and dissipate binds and reduce swelling. Used for stubborn phlegm cough, wind-phlegm dizziness, wind-stroke with phlegm obstruction, deviation of the mouth and eyes, hemiplegia, epilepsy, fright wind, and tetanus. Dries dampness and stops spasms.

How to choose between raw and processed? Can raw Tiannanxing replace it?

Tuber is processed. Raw product emphasizes reducing swelling; processing reduces toxicity, and cannot replace it in equal amounts. Commercial products are standardized; do not adjust arbitrarily.

What is the dosage of Zhi Tiannanxing? Can it be used daily as a phlegm-transforming tea?

Decoction, 3-9g. Modern use requires physician-determined dosage. It is not a year-round "Zhi Tiannanxing tea." Toxic. Pregnancy will be further injured by prolonged use. Stubborn phlegm requires short-term, physician-determined dosage and cannot replace evaluation.

What are the contraindications of Zhi Tiannanxing? Can pregnant women use it?

Toxic. Use with caution in pregnancy. Not suitable for yin deficiency dry cough. Stop if dry mouth or fatigue occur. Seek immediate medical care for severe stubborn phlegm or high fever.

Can Zhi Tiannanxing dry dampness, transform phlegm, and stop spasms?

It can assist stubborn phlegm cough, wind-phlegm dizziness, wind-stroke with phlegm obstruction, deviation of the mouth and eyes, hemiplegia, epilepsy, fright wind, and tetanus. It dries dampness and transforms phlegm, dispels wind and stops spasms, and dissipates binds and reduces swelling, but is not a specific remedy for all cough or all fright wind.

Can Zhi Tiannanxing be taken daily as a phlegm-transforming or spasm-stopping tea?

Stubborn phlegm cough can be used short-term in formulas; pregnancy will be further injured. The idea that "Zhi Tiannanxing must transform phlegm" cannot replace evaluation. Drying dampness and transforming phlegm requires physician-determined formulation and dosage.

How to choose between Zhi Tiannanxing, raw Tiannanxing, Banxia, Baifuzi, and Tianma?

Zhi Tiannanxing dries dampness and stops spasms, suited to stubborn phlegm. Raw Tiannanxing dries dampness and reduces swelling. Banxia dries dampness and descends counterflow. Baifuzi dispels wind-phlegm and stops spasms. Tianma calms the liver and extinguishes wind while stopping spasms. Choose Zhi Tiannanxing for transforming phlegm; raw Tiannanxing for reducing swelling; Banxia for descending counterflow; Baifuzi for dispelling wind; Tianma for extinguishing wind. Pattern differentiation applies, but use with caution in large doses during pregnancy.

How is Zhi Tiannanxing commonly modified? What is a representative usage?

Modifications depend on the pattern. Add Banxia for stubborn phlegm; add Tianma for stopping spasms. Specify Zhi Tiannanxing; do not substitute raw Tiannanxing in equal amounts for stopping spasms.

How to select and store Zhi Tiannanxing?

Choose regular Chinese medicinal materials with intact processed products. Discard if moldy, damp, or abnormal in odor. Store in a dry place. Purchase "Zhi Tiannanxing"; do not substitute raw Tiannanxing or Banxia in equal amounts for drying dampness, transforming phlegm, and stopping spasms.

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Medical Disclaimer — This article is provided for educational purposes only and describes traditional Chinese medicine concepts. It is not medical advice, and it is not intended to diagnose, treat, cure or prevent any disease. Always consult a qualified practitioner before using any herb, particularly if you are pregnant, nursing, taking medication or managing a diagnosed condition.