Tou Gu Cao
StarSperanskia tuberculata (Bunge) Baill.
☯ TCM Properties
Dispels Wind-Dampness; Relaxes the Sinews and Unblocks the Collaterals; Invigorates Blood and Alleviates Pain; Invigorates Blood and Reduces Swelling; Resolves Toxicity
Traditional Chinese Uses
Tou Gu Cao (impatiens stem, balsam stem) is a warm herb used in Chinese medicine primarily to expel Wind-Damp from the joints and muscles and to soften and dissolve bone accumulations. It relieves joint swelling, pain, and stiffness from Wind-Damp bi obstruction, and is particularly noted for its traditional application in dissolving fish or small bone obstructions in the throat. This latter use gave rise to its classical reputation as an herb that softens hard substances.
Botanical Description
Speranskia tuberculata is a slender perennial herb of the family Euphorbiaceae endemic to northern and central China, where it grows on dry grassy slopes, stony banks and roadsides at low to mid elevations. From a short woody rootstock it produces several erect or ascending stems 20-50 cm tall, finely puberulent and often tinged purple at the base, bearing alternate, short-petiolate, lanceolate to oblong-lanceolate leaves 2-5 cm long with shallowly crenate-serrate margins and slightly tuberculate surfaces. The monoecious inflorescences are slender terminal racemes 5-15 cm long bearing small staminate flowers in the upper part and a few pistillate flowers below, both apetalous with five greenish sepals. The fruit is a three-lobed, tuberculate capsule about 3 mm wide containing globose grey-brown seeds. The whole flowering herb is collected in summer.
Active Constituents
Polyoxygenated alkaloids (speranculatines A-C, speranskilatine A, speranberculatine A)
Bipyridine / pyrrolylpyridine / bipyrrole alkaloidsConcentration: minor constituents isolated from the whole herb
A series of unusual polyoxygenated bipyridine, pyrrolylpyridine and bipyrrole alkaloids characteristic of Speranskia tuberculata; of chemotaxonomic interest and under study for bioactivity.
Flavonoids (kaempferol- and quercetin-type glycosides)
Flavonol glycosidesConcentration: present in aerial parts
Antioxidant and anti-inflammatory flavonoids reported from the herb; contribute to the analgesic and anti-inflammatory activity seen in extract studies.
beta-Sitosterol
PhytosterolConcentration: minor
Common plant sterol with mild anti-inflammatory activity, isolated among the chemical constituents of the herb.
18-Hydroxy-(-)-manool
Labdane diterpenoidConcentration: minor
Diterpenoid isolated from S. tuberculata; part of the characteristic terpenoid profile of the plant.
Volatile oil and organic acids
Essential oil / carboxylic acidsConcentration: small amounts
Aromatic volatile components and organic acids of the aerial parts that support its traditional use as an external wash to dispel Wind-Damp and relieve pain and itch.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9-15g | Daily | — | — | — |
Preparation Methods
Decoction (internal)
Parts: Aerial parts (whole herb)
Typical adult dose is about 9-15 g of the dried herb decocted in water, used to dispel Wind-Dampness, free the sinews and collaterals and relieve joint and muscle pain in Bi (painful obstruction) syndromes.
External wash / steam-soak (fumigation-washing)
Parts: Aerial parts (whole herb)
The herb is boiled and the warm decoction used as a soak, steam or wash over painful, swollen or stiff joints and over damp skin lesions; frequently combined with other Wind-Damp-dispelling herbs for external application. Note: the common name Tou Gu Cao is shared by several unrelated plants in Chinese markets (e.g. Impatiens balsamina stem, Caragana species); confirm botanical source as Herba Speranskiae Tuberculatae before use. Avoid internal use in pregnancy given the blood-invigorating action and limited safety data.
Historical Texts
Ben Cao Gang Mu Shi Yi (Supplement to the Compendium of Materia Medica), Zhao Xuemin
Qing dynasty, 1765References
- Zhou Y, Wang S, Li Y, Xia W, Meng X, Peng C, Zhang H. Evaluation of analgesic, anti-inflammatory and antipyretic activities of the ethanol extract from Speranskia tuberculata . African Journal of Traditional, Complementary and Alternative Medicines 12(3):49-54 (2015) [DOI]
- Zhao WM, Xu JP, Qin GW, Xu RS. Polyoxygenated Bipyridine, Pyrrolylpyridine, and Bipyrrole Alkaloids from Speranskia tuberculata . Journal of Natural Products 62(11):1573-1575 (1999) [DOI]
- Xu JP, et al.. Chemical constituents from Speranskia tuberculata (Bge.) Baill . Zhongguo Zhong Yao Za Zhi (China Journal of Chinese Materia Medica) 27(9):676-678 (2002) [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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