Ban Bian Lian
StarLobelia chinensis Lour.
Traditionally used for
- Digestion
- Urinary & fluids
- Skin
Cautions & contraindications
- Pregnancy
- Heart conditions
☯ TCM Properties
Clears Heat and Resolves Toxicity; Promotes Urination and Reduces Edema; Resolves Dampness from the Skin; Counteracts Snake and Insect Venom
Traditional Chinese Uses
Ban Bian Lian (lobelia herb, half-lotus herb) is a cold herb used in Chinese medicine primarily to clear Heat toxin, promote urination, and reduce swelling. It is applied for toxic swellings, snake bites, ascites from Liver-related abdominal conditions, and urinary difficulty from fluid retention. Its modest diuretic and detoxifying actions make it relevant in both external and internal Heat toxin conditions, and it appears in formulas targeting edema and inflammatory accumulations.
Relationships
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Botanical Description
Lobelia chinensis is a small, slender, creeping perennial herb of the family Campanulaceae (subfamily Lobelioideae) native to wet meadows, paddy margins and ditch banks across southern and central China, the Korean peninsula, Japan and Southeast Asia. The thread-like, glabrous, often rooting stems are only 10-25 cm long and bear alternate, narrowly lanceolate to linear-oblong, sessile leaves 1-2 cm long with a few obscure teeth on the margin. The distinctive solitary axillary flowers are 8-12 mm across and have a strongly bilabiate, deeply five-lobed pink to pale lilac corolla in which all five lobes spread to one side, giving a fan-like appearance characteristic of Lobelia, with the five anthers fused around the style. The fruit is an obconical, two-valved capsule 5-8 mm long containing numerous minute seeds. The whole flowering herb with root is collected in summer.
Active Constituents
Lobelanine
Piperidine (lobelane-type) alkaloidOne of the piperidine alkaloids characteristic of the herb. It is a diketone congener of lobeline; the pharmacology of L. chinensis alkaloids is far less studied than that of the lobeline of Lobelia inflata, and no nicotinic-receptor activity has been established for the Chinese species.
Lobelanidine
Piperidine (lobelane-type) alkaloidThe corresponding diol congener, reported among the principal alkaloids of L. chinensis in the phytochemical literature.
Lobechidine A
Piperidine alkaloidOne of twelve stereochemically distinct piperidine alkaloids resolved in L. chinensis by HPLC coupled to quadrupole time-of-flight mass spectrometry. Compounds of this series, rather than lobeline, make up the actual alkaloid profile of the herb.
Diosmin
Flavone glycosideA flavonoid glycoside identified in the herb. The flavone glycosides diosmin and linarin, with their aglycones diosmetin and apigenin, are the most abundant non-alkaloid constituents and are candidates for the anti-inflammatory activity attributed to the drug.
Linarin
Flavone glycosideAn acacetin glycoside of the herb; the related 3'-methoxyl-linarin was newly reported in this species in the 2018 HPLC/Q-TOF MS profiling study.
Nonanedioic acid (azelaic acid)
Aliphatic dicarboxylic acidAn organic acid identified in L. chinensis alongside polyacetylenes and alkaloid-lignan hybrid analogues, part of the non-alkaloid fraction of the herb.
⚠ Drug Interactions
Lobelia inflata and other lobeline-containing Lobelia products
English-language suppliers sell both under the single word 'lobelia'. They are not interchangeable. HPLC/Q-TOF MS profiling of ten batches of L. chinensis collected across China found lobeline absent from every batch, while the same method readily detected it in L. inflata. Lobeline is a nicotinic acetylcholine receptor ligand and respiratory stimulant, and lobeline-containing smoking-cessation products were removed from the US market in 1993 for lack of demonstrated efficacy. Nothing in the L. chinensis literature supports attributing lobeline-type nicotinic effects to Ban Bian Lian, and dosing it as though it contained lobeline, or dispensing L. inflata against a Ban Bian Lian prescription, gives the patient the wrong drug.
Clinical note: Order by binomial. Reject material labelled only 'lobelia'. Do not carry across cautions, doses or claimed nicotinic effects from Lobelia inflata to this herb, and do not assume this herb helps with smoking cessation.
Loop and thiazide diuretics (e.g. furosemide, hydrochlorothiazide, bumetanide, torsemide)
Diuresis is among the pharmacological activities reported for L. chinensis and is the basis of its traditional use for oedema and abdominal fluid accumulation. The magnitude of the effect in humans has not been quantified and no interaction study exists, so additive natriuresis or potassium loss is inferred from the herb's stated action rather than measured.
Clinical note: In patients on prescription diuretics, especially with ascites or heart failure, monitor weight, blood pressure and serum potassium if this herb is added, and do not treat it as an interchangeable substitute for the prescribed diuretic.
Concurrent oral medication in patients prone to gastrointestinal upset
Standard materia medica note that decoctions of this herb can cause loose stools and anorexia, and the herb is classed as mildly toxic with reported adverse effects including vomiting, heartburn, tachycardia and abdominal pain at higher intakes. It is also traditionally contraindicated in oedema from deficiency, in blood deficiency and in pregnancy.
Clinical note: Start at the low end of the 3 to 15 g dried range and reserve the higher snakebite doses for that indication. Avoid in pregnancy and in patients whose oedema is a deficiency pattern rather than damp-heat.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9–15 g | Daily | — | — | 中国药典 2020 【用法与用量】9～15g。 【性味与归经】辛，平。归心、小肠、肺经。 — Chinese Pharmacopoeia 2020, quoted verbatim; route and cautions preserved. Replaces a cleared category-filler value. |
Evidence Tier
Limited evidence · 1 studyRecorded 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
1
0 verified · 1 unverified
Other / unclassified
0
Verified: design read from PubMed for a DOI that resolves to the cited paper Unverified: taken from the study's recorded description
Clinical Studies
Chemical Profiling of Lobelia chinensis with High-Performance Liquid Chromatography/Quadrupole Time-of-Flight Mass Spectrometry (HPLC/Q-TOF MS) Reveals Absence of Lobeline in the Herb
Profiled ten batches of L. chinensis from different regions of China and found lobeline absent from all of them, while detecting it readily in Lobelia inflata as a positive comparator. Twelve stereochemically distinct piperidine alkaloids, four alkaloid-lignan hybrids, four flavonoids, two polyacetylenes and nonanedioic acid were identified instead. This overturns the common assumption that Ban Bian Lian is a lobeline-containing drug.
Historical Texts
Ben Cao Gang Mu
Ming dynastyReferences
- Mei-Wan Chen, Wen-Rong Chen, Jin-Ming Zhang, Xiao-Ying Long, Yi-Tao Wang. Lobelia chinensis: chemical constituents and anticancer activity perspective . Chinese Journal of Natural Medicines (2014) [DOI]
- Shuang Yang, Tao Shen, Lijuan Zhao, Chao Li, Yao Zhang, Hongxiang Lou, Dongmei Ren. Chemical constituents of Lobelia chinensis . Fitoterapia (2014) [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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