Raw Arisaema Rhizome
- Chinese
- 生南星
- Pinyin
- Sheng Nan Xing
- Latin
- Rhizoma Arisaematis
Known in TCM as Sheng Nan Xing (生南星), this bitter and acrid, warm herb enters the Lung, Liver, and Spleen. Traditionally, it strongly dries dampness and disperses stubborn wind-phlegm - Sheng Nan Xing is the unprocessed Arisaema tuber behind later processed Nan Xing products and represents the harshest classical form for severe obstructive phlegm patterns, most often applied for productive cough, asthma, and epilepsy. Modern research has identified Calcium among its active constituents.
Part used: Rhizome
Also Known As
Latin: Rhizoma Arisaematis | Pinyin: Sheng Nan Xing | Chinese: 生南星
TCM Properties
- Taste
- bitter, acrid
- Temperature
- warm
- Channels
- Lung, Liver, Spleen
Traditional Use
Primary Actions
- Strongly dries dampness and disperses stubborn wind-phlegm - Sheng Nan Xing is the unprocessed Arisaema tuber behind later processed Nan Xing products and represents the harshest classical form for severe obstructive phlegm patterns.
- Opens the channels and stops spasms - classical use extends to wind-phlegm with numbness, facial deviation, seizures, and stubborn blockage of the collaterals.
- Resolves swelling and dissipates nodules externally - powdered raw herb mixed with vinegar or wine is used topically for abscesses, boils, snakebite, and hard painful swellings.
- Serves as the toxic precursor for Zhi Nan Xing and Dan Nan Xing - keeping this raw page separate preserves the clinically crucial distinction between external/raw use and the safer processed internal medicines.
Secondary Actions
- In modern practice Sheng Nan Xing is usually reserved for expert-managed external use or for carefully pre-decocted internal use in special cases; ordinary internal prescriptions almost always choose processed Tian Nan Xing instead.
- This page should not be collapsed into the later Zhi Nan Xing or Dan Nan Xing records, because processing materially changes both toxicity and therapeutic emphasis.
Classic Formulas
- Sheng Nan Xing powder with vinegar - raw external paste tradition for boils, phlegm nodules, and painful swellings.
- Ru Yi Jin Huang San logic - raw Nan Xing joins heat-clearing external medicinals when swelling, abscess, and toxin need stronger dispersing action.
- Sheng Nan Xing pre-decocted with Ban Xia and Tian Ma - specialist wind-phlegm strategy when raw-strength channel-opening action is deliberately sought under close supervision.
Classical References
- TCM Wiki and later materia medica descriptions treat Sheng Nan Xing as the raw toxic state of Tian Nan Xing, warm and strongly acrid-bitter with Lung, Liver, and Spleen entry.
- Classical cautions repeatedly stress that unprocessed Nan Xing is harsher, more irritant, and more dangerous than the prepared internal form.
- Modern practice guidance preserves raw Nan Xing mainly for external use or for very carefully managed internal decoction after prolonged boiling.
Modern Research
Active Compounds
- Calcium oxalate raphides - major irritant needle crystals responsible for oral, skin, and mucosal toxicity
- Lectins and toxalbumin-like proteins - important contributors to inflammatory and toxic effects
- Flavonoids, sterols, and phenylpropanoid-type constituents - broader chemistry classes cataloged in Arisaematis Rhizoma
- Polysaccharides and small alkaloid-related constituents - supportive constituents under continuing phytochemical study
Studied Effects
- A 2015 metabolomics toxicity study showed raw Arisaematis Rhizoma caused metabolic, renal, and membrane-injury signals in rats, directly supporting the longstanding classical warning that Sheng Nan Xing is toxic (PMID 25407163).
- A 2021 review summarized the expanding chemistry and preclinical bioactivities of Arisaematis Rhizoma, but also highlighted that the material's toxicology remains central to any responsible clinical interpretation (PMID 34738419).
- A 2013 emergency case report described oropharyngeal airway obstruction after accidental ingestion of Arisaema amurense, illustrating how raw Arisaema can produce dangerous mucosal edema outside the formal herbal context (PMID 23643241).
PubMed References
Safety & Interactions
Contraindications
- Pregnancy
- Yin deficiency with dry cough or fluid depletion
- Any unsupervised internal use of the raw herb
Cautions
- Raw Sheng Nan Xing can burn and numb the mouth and throat, irritate skin and eyes, and in severe exposures contribute to airway-threatening swelling.
- Internal use, if chosen at all, requires prolonged pre-decoction and practitioner supervision; ordinary self-treatment is inappropriate.
- Because later processing fundamentally changes both toxicity and indication, this raw page should not be used interchangeably with Tian Nan Xing, Zhi Nan Xing, or Dan Nan Xing.
Conditions
- Productive Cough Traditional ★★★☆☆ JSON
- Asthma Traditional ★★☆☆☆ JSON
- Epilepsy Traditional ★★☆☆☆ JSON
- Furunculosis Traditional ★★☆☆☆ JSON
Frequently Asked Questions
What is Raw Arisaema Rhizome used for?
Raw Arisaema Rhizome is traditionally used to Strongly dries dampness and disperses stubborn wind-phlegm - Sheng Nan Xing is the unprocessed Arisaema tuber behind later processed Nan Xing products and represents the harshest classical form for severe obstructive phlegm patterns., Opens the channels and stops spasms - classical use extends to wind-phlegm with numbness, facial deviation, seizures, and stubborn blockage of the collaterals., Resolves swelling and dissipates nodules externally - powdered raw herb mixed with vinegar or wine is used topically for abscesses, boils, snakebite, and hard painful swellings., Serves as the toxic precursor for Zhi Nan Xing and Dan Nan Xing - keeping this raw page separate preserves the clinically crucial distinction between external/raw use and the safer processed internal medicines.. Research has investigated its effects on: A 2015 metabolomics toxicity study showed raw Arisaematis Rhizoma caused metabolic, renal, and membrane-injury signals in rats, directly supporting the longstanding classical warning that Sheng Nan Xing is toxic (PMID 25407163).; A 2021 review summarized the expanding chemistry and preclinical bioactivities of Arisaematis Rhizoma, but also highlighted that the material's toxicology remains central to any responsible clinical interpretation (PMID 34738419)..
What are other names for Raw Arisaema Rhizome?
Raw Arisaema Rhizome is also known as Raw Tian Nan Xing, Raw Nan Xing, Arisaematis. In TCM: 生南星 (Sheng Nan Xing); Rhizoma Arisaematis.
Is Raw Arisaema Rhizome safe during pregnancy?
The safety of Raw Arisaema Rhizome during pregnancy has not been established. Consult a qualified healthcare provider before use.
What are the contraindications for Raw Arisaema Rhizome?
Raw Arisaema Rhizome should not be used in: Pregnancy; Yin deficiency with dry cough or fluid depletion; Any unsupervised internal use of the raw herb. Consult a qualified practitioner before use.