Bai Fu Zi
StarTyphonium giganteum Engl.
Traditionally used for
- Headaches
- Dizziness
- Eye health
- Cough & breathing
- Nerves & recovery
- Skin
Cautions & contraindications
- Pregnancy
- Breastfeeding
- Heart conditions
- Toxic — professional use only
☯ TCM Properties
Dispels Wind-Phlegm; Dries Dampness and Transforms Phlegm; Extinguishes Wind and Stops Spasms; Relieves toxicity and dissipates nodules; Alleviates Pain
Traditional Chinese Uses
Bai Fu Zi (typhonium rhizome) is a warm, pungent herb that dissolves Phlegm, expels Wind, and stops spasms. It is used for Wind-Phlegm patterns affecting the head — including facial paralysis, deviation of the mouth and eyes, headaches, and dizziness from Wind-Phlegm in the channels of the head. It also treats snake bites, carbuncles, and swellings from toxin in the skin and channels. As a toxic herb, it is always used in processed form and requires professional prescription.
Relationships
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Botanical Description
Typhonium giganteum is a tuberous perennial herb of the family Araceae endemic to forest understorey and shaded slopes of central and northern China. From a depressed-globose to ovoid underground tuber 2-4 cm in diameter, white and starchy internally with a brown corky skin, it produces one or two long-petiolate basal leaves; the lamina is sagittate to broadly hastate, 15-30 cm long, deep green and glabrous, with the basal lobes spreading and acute. The inflorescence is a typical aroid spadix subtended by a long, narrow, purplish-green spathe 15-30 cm long that is constricted between the basal female zone and the upper male zone, with a slender, terminal, purple-brown appendix that emits a faintly fetid odour at anthesis. Fruiting is rarely seen in cultivation; the medicinal tuber is harvested in autumn and processed before use.
Active Constituents
Calcium oxalate raphides (needle crystals)
Inorganic crystal, calcium oxalate monohydrate, bundled with associated proteinConcentration: The dominant irritant fraction of the raw tuber; in the closely related Araceae drug Arisaematis Rhizoma the isolated needle crystals are about 90% calcium oxalate by mass
The physical cause of the acute oropharyngeal injury from the raw drug. The crystals are elongated, sharply pointed and rigid, some barbed and grooved, and they mechanically penetrate mucosa, opening a route for the protein toxin carried with them. This is the fraction that pharmacopoeial processing exists to destroy.
Typhonium giganteum lectin
Plant lectin (carbohydrate-binding protein)The chemical half of the acute irritant toxicity, released once the raphides have breached the mucosa. On RAW 264.7 macrophages it raised TNF-alpha, IL-1beta, phospho-IkappaB and phospho-p65 dose-dependently over 6.25 to 50 micrograms per millilitre, increased reactive oxygen species and cytosolic free calcium, lowered mitochondrial membrane potential, and at 50 micrograms per millilitre caused apoptosis within one hour followed by progressive necrosis. The ROS scavenger N-acetylcysteine blunted both the cytokine output and the NF-kappaB activation.
Typhonosides (cerebrosides)
Sphingolipid, cerebroside (glycosylceramide)Cerebrosides isolated from the tuber protected PC12 cells through regulation of caspase-3 and the Bax/Bcl-2 axis, which is the closest chemical support the drug has for its traditional wind-extinguishing and neurological indications.
Rutin
Flavonol glycosideConcentration: Reported for the first time from this tuber in 2023
Inhibited monoamine oxidase B with an IC50 of 45.6 micromolar and protected PC-12 cells against 6-hydroxydopamine injury, one of the two most active compounds in the anti-Parkinsonian screen of the tuber.
5-Caffeoylquinic acid (chlorogenic acid)
Hydroxycinnamoyl quinic acid esterInhibited monoamine oxidase B with an IC50 of 96.2 micromolar and showed significant protection of 6-hydroxydopamine-injured PC-12 cells. Also newly reported from the tuber in the same 2023 study.
Berberine
Protoberberine isoquinoline alkaloidReported for the first time from the tuber in 2023, with moderate monoamine oxidase B inhibition (IC50 118.8 micromolar). Its presence is chemically unexpected in an aroid and is worth confirming independently before it is relied on.
Tuber polysaccharides
Heteropolysaccharide, composed of mannose, rhamnose, glucuronic acid, galacturonic acid, glucose, galactose, arabinose and fucoseConcentration: Yield about 7.3% by ultrasound-assisted extraction of the dried tuber
The bulk non-toxic fraction of the tuber, with antioxidant and hypoglycaemic activity in vitro. Their mucilaginous character is part of why raw tuber powder adheres to and holds crystals against mucosa.
beta-Sitosterol
PhytosterolA routine sterol constituent of the tuber, commonly recovered alongside its glucoside during phytochemical work on the drug.
⚠ Drug Interactions
Aconitum coreanum root (Guan Bai Fu Zi)
This is the single most dangerous confusion attached to this drug, and it is a confusion of names, not of appearance. Aconitum coreanum root and Typhonium giganteum tuber were both called Bai Fu Zi for centuries; the 1963 Chinese Pharmacopoeia listed both as source plants, the 1977 edition made Typhonium the sole source and listed Guan Bai Fu separately, and from 1985 Guan Bai Fu was dropped from the Pharmacopoeia altogether while remaining in wide regional use. Aconitum coreanum is a true aconite carrying aconitine-type diterpenoid alkaloids including guanfu base A, with the cardiac and neurological toxicity of that class. Typhonium giganteum has no alkaloids of that kind at all; its toxicity is mechanical and inflammatory.
Clinical note: When a prescription or a supplier says Bai Fu Zi, establish which plant is meant before dispensing, and require the botanical name. Guan Bai Fu is not a grade or a variant of Bai Fu Zi, it is an aconite, and substituting it carries a risk of arrhythmia and death rather than mucosal irritation. Be especially careful with material sourced from northeastern China and Korea, where Guan Bai Fu is the drug traditionally meant by the name.
Aconitum carmichaelii lateral root (Fu Zi, Radix Aconiti Lateralis Preparata)
Bai Fu Zi and Fu Zi are unrelated drugs from unrelated families whose names differ by one syllable, and the resemblance is amplified in transliteration, in handwriting and in abbreviated clinic notes. Fu Zi is processed aconite, a Class-restricted toxic drug that requires prolonged decoction to hydrolyse diester diterpenoid alkaloids and whose overdose causes ventricular arrhythmia; Bai Fu Zi is an aroid tuber whose hazard is raphide and lectin irritancy. Their doses, processing requirements and antidote pathways have nothing in common.
Clinical note: Never abbreviate either name on a prescription. Write the full pinyin plus the Latin pharmaceutical name, and confirm the drug at the point of dispensing. If a patient reports perioral numbness, palpitations or paraesthesia after taking what was supposed to be Bai Fu Zi, treat it as suspected aconite poisoning and seek emergency care.
Raw (unprocessed) Typhonii Rhizoma dispensed in place of processed Zhi Bai Fu Zi
Internal use of the drug is legitimate only in the processed form. Processing works on the two toxic fractions in different ways: alum supplies aluminium ions that complex oxalate and dissolve the calcium oxalate crystals, ginger juice denatures the lipophilic needle-crystal complex, alkaline treatment above pH 12 disrupts the crystalline structure, and heat denatures the lectin. In the closely related aroid Arisaematis Rhizoma these differences are quantified: the isolated needle crystals had an LD50 of 42.53 mg/kg, raw powder 1062 mg/kg, and processed powder 2788 mg/kg. The raw drug is for external use only.
Clinical note: Prescribe and stock only processed Bai Fu Zi (Zhi Bai Fu Zi) for internal use, and check that the supplier states the processing method. Raw tuber taken by mouth causes immediate burning, swelling and numbness of the lips, tongue and throat, with a risk of airway compromise. Do not accept a batch labelled only Bai Fu Zi without confirmation of processing.
Pinellia ternata tuber (Ban Xia, Pinelliae Rhizoma)
An ITS2 nucleotide-signature survey of 56 Pinelliae Rhizoma products on the Chinese market (slices, powder and patent medicines) found about 66% adulterated, with Typhonium giganteum present in 2% of the products assayed. The traffic runs in the direction of Bai Fu Zi being sold as Ban Xia rather than the reverse, but it establishes that these tubers move interchangeably through the trade. The two drugs have different indications, different dose ranges and different processing requirements even though both are raphide-bearing aroids.
Clinical note: Do not buy either drug as powder. Where the distinction matters clinically, particularly in paediatric or pregnancy-adjacent prescribing, require DNA-authenticated material, since morphological identification of processed slices is unreliable.
Pregnancy
Bai Fu Zi is one of the toxic drugs of the 2020 Chinese Pharmacopoeia and is traditionally contraindicated in pregnancy. It falls in the Araceae-metabolite class identified in the pharmacovigilance analysis of Chinese patent medicines containing toxic ingredients, where adverse events concentrate in the digestive system and the skin. No reproductive toxicology adequate to overturn the traditional contraindication exists, and absence of an assay is not evidence of safety.
Clinical note: Do not prescribe Bai Fu Zi in pregnancy or while breastfeeding. Check patent medicines for facial paralysis, stroke sequelae and migraine, which frequently contain it without prominent labelling.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 3–6 g | — | — | — | ChP 2025. 一般炮制后用 — generally used processed. Caution in pregnancy; raw internal use with caution. Corrected from a generic 6-15g decoction filler value generated from tcm_category. |
| topical | Appropriate amount | — | — | — | ChP 2025. 外用生品适量捣烂，熬膏或研末以酒调敷患处。 |
Dui Yao — Herb Pairs
The classical two-herb combinations this herb appears in, each with an action neither herb has alone.
Expels wind-phlegm from the face and channels while extinguishing wind and stopping spasms.
Facial paralysis (deviation of mouth and eye).
Core pair of a classical formula — Qian Zheng San, Yang Shi Jia Cang Fang
Expels wind-phlegm while strongly extinguishing wind and unblocking the collaterals.
Facial paralysis; both are toxic.
Core pair of a classical formula — Qian Zheng San, Yang Shi Jia Cang Fang
Both expel wind-phlegm and stop spasms, together calming tetany and convulsions.
Tetanus. Both are toxic; the formula is traditionally also applied externally.
Core pair of a classical formula — Yu Zhen San, Wai Ke Zheng Zong (Chen Shigong, 1617)
Evidence Tier
Moderate evidence · 5 studiesRecorded studies by study design, strongest design at the top. This is a study-design tier only, not a GRADE rating: it does not weigh risk of bias, consistency or precision.
Systematic review / meta-analysis
0
Randomized controlled trial
0
Other clinical trial
0
Observational / case report
0
In vitro / animal
4
2 verified · 2 unverified
Show 4 studies
- Typhonium giganteum Lectin Exerts A Pro-Inflammatory Effect on RAW 264.7 via ROS and The NF-κB Signaling Pathway
- Neuroprotective Activity of Cerebrosides from Typhonium giganteum by Regulating Caspase-3 and Bax/Bcl-2 Signaling Pathways in PC12 Cells
- Chemical components and monoamine oxidase B inhibition activities from the tubers of Sauromatum giganteum (Engl.) Cusimano & Hett
- Qianzheng powder promotes facial nerve regeneration via BDNF/TrkB/CREB pathway activation
Other / unclassified
1
1 verified · 0 unverified
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Typhonium giganteum Lectin Exerts A Pro-Inflammatory Effect on RAW 264.7 via ROS and The NF-κB Signaling Pathway
Identifies the lectin of the tuber as the molecular basis of the acute irritant toxicity of the raw drug. In RAW 264.7 macrophages at 6.25 to 50 micrograms per millilitre it raised TNF-alpha and IL-1beta with dose-dependent increases in phospho-IkappaB and phospho-p65, up-regulated reactive oxygen species and cytosolic free calcium, and lowered mitochondrial membrane potential. N-acetylcysteine reduced both the cytokines and the NF-kappaB activation, tying the inflammation to oxidative stress. At 50 micrograms per millilitre the lectin caused apoptosis within an hour and increasing necrosis thereafter.
Processing-induced detoxification of toxic Traditional Chinese Medicines: a systematic review of attenuation mechanisms at physical, chemical, and in vivo levels
Systematic review of the toxic drugs of the 2025 Chinese Pharmacopoeia and their processing. For the raphide-bearing Araceae drugs it identifies the toxic principle as needle crystals of calcium oxalate carrying protein toxins, and sets out how each adjuvant acts: aluminium from alum binds oxalate to form aluminium oxalate complexes and dissolves the crystals, ginger extracts denature the lipophilic crystal complex, alkaline treatment with licorice or limewater above pH 12 disrupts the crystal structure, and microwave irradiation reduces crystal content and alters morphology within ten minutes. The mechanisms are set out qualitatively; the review does not supply quantitative reduction figures for these drugs, so processing is mechanistically rationalised rather than fully validated.
Neuroprotective Activity of Cerebrosides from Typhonium giganteum by Regulating Caspase-3 and Bax/Bcl-2 Signaling Pathways in PC12 Cells
Cerebrosides isolated from the tuber were neuroprotective in PC12 cells through regulation of caspase-3 and the Bax/Bcl-2 ratio. Preclinical single-cell-line work, but it is one of the few chemical findings that speaks to the drug's traditional neurological indications rather than to its toxicity.
Chemical components and monoamine oxidase B inhibition activities from the tubers of Sauromatum giganteum (Engl.) Cusimano & Hett
Nineteen compounds isolated from the tuber, of which berberine, nicotinamide, rutin and 5-caffeoylquinic acid were reported from the plant for the first time. Six compounds gave moderate monoamine oxidase B inhibition with IC50 values of 118.8, 45.6, 96.2, 65.8, 40.0 and 49.8 micromolar, and rutin and 5-caffeoylquinic acid protected 6-hydroxydopamine-injured PC-12 cells. Published under the accepted name Sauromatum giganteum, which is the same plant as Typhonium giganteum Engl.
Qianzheng powder promotes facial nerve regeneration via BDNF/TrkB/CREB pathway activation
Facial nerve crush model in male C57BL/6 mice treated with Qian Zheng San, the classical formula in which Bai Fu Zi is the chief herb, at 3.51 g/kg orally for 14 days. Facial motor function improved from day 7, neuronal loss in the facial motor nucleus and buccinator atrophy were reduced, and myelin markers MPZ and MBP together with BDNF, TrkB and phospho-CREB rose. Liver and kidney histology and serum biochemistry showed no toxicity at this dose. This is formula-level, not single-herb, evidence and it is preclinical.
⚠ Safety & Contraindications
- Pregnancy
- Breastfeeding
- Heart conditions
- Toxic — professional use only
Contraindications
Contraindicated in pregnancy. Not for use in yin deficiency with internal wind.
Safety Warnings
- Only the processed rhizome is used internally.
- Distinct from Fu Zi (prepared aconite) despite the similar name — the two are unrelated drugs with different toxicities.
⚠ Toxicity Information
Burning and swelling of the mouth and throat from the raw drug; numbness and salivation.
Historical Texts
Ming Yi Bie Lu (Miscellaneous Records of Famous Physicians)
Six Dynasties, c. 500 CE, compiled by Tao HongjingYang Shi Jia Cang Fang (Yang's Family Treasured Formulas), source text of Qian Zheng San
Song dynasty, 1178, Yang TanChinese Pharmacopoeia, editions of 1963, 1977 and 1985
Modern, 20th centuryReferences
- Yin TP, Yan YF, He JM. Aconitum coreanum Rapaics: Botany, traditional uses, phytochemistry, pharmacology, and toxicology . Open Chemistry (2022) [DOI]
- Zhang T, Xu F, Ruhsam M, Feng L, Zhang M, Wang Z, Wang X. A nucleotide signature for the identification of Pinelliae Rhizoma (Banxia) and its products . Molecular Biology Reports (2022) [DOI]
- Liu Y, Li X, Chen C, Leng A, Qu J. Effect of mineral excipients on processing traditional Chinese medicines: an insight into the components, pharmacodynamics and mechanism . Chinese Medicine (2021) [DOI]
- Zhang N, Zhong C, Liu G, Li S, Lin L, Wei N, Song Y, Wan X, Wang Y, Wang Y, Wu W, Qian Z, Zhai H. 'Risk-benefit' assessment for comprehensive safety evaluation of Chinese patent medicines containing four common toxic ingredients: an analysis of clinical risk factors . Frontiers in Pharmacology (2024) [DOI]
- Peng X, Wang JY, Gao KX, Wang ZK, Deng QL, Wang Y, Hu MB, Liu YJ. Utilizing ultrasound for the extraction of polysaccharides from the tuber of Typhonium giganteum Engl.: Extraction conditions, structural characterization and bioactivities . Ultrasonics Sonochemistry (2025) [DOI]
This information is for educational purposes only and is not intended to replace professional medical advice. Always consult a qualified healthcare provider before using any herbal remedy, especially if you are pregnant, nursing, or taking medications.
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