Tu Huang Lian
StarBerberis julianae C.K.Schneid.
Also known as: T'u Huang Lien · Wade–Giles
Easily confused with
- Hu Huang Lian 胡黄连 — pinyin one letter apart. Tu Huang Lian: clearing heat, cold; Hu Huang Lian: clearing heat, cold.
Safety at a glance
No rule in our tables for this herb: pregnancy, breastfeeding, incompatible pairs (十八反 / 十九畏), herb–drug, dose ceiling. This is not a safety clearance.
Not graded — No toxicity grade is recorded. Most herbs in the catalogue carry none.
Traditionally used for
- Eye health
- Nose & throat
- Digestion
- Bowel health
- Skin
Cautions & contraindications
- Kidney conditions
☯ TCM Properties
Eliminates Heat, relieves Dampness, purges Excessive Fire and detoxifies
Traditional Chinese Uses
Tu Huang Lian is a regional folk substitute for true Huang Lian (Coptis), prepared from the berberine-rich root and stem of Berberis julianae or the closely related Mahonia bealei. Bitter and cold, entering the Liver, Stomach and Large Intestine channels, it is used to clear Heat and dry Dampness, drain Excess Fire and resolve toxicity. Its indications follow those of other berberine-bearing herbs: damp-heat diarrhea and dysentery, Stomach Heat, red and swollen eyes, mouth and tongue sores, sore throat, and hot skin lesions or abscesses.
It is not the pharmacopoeial Coptis and is regarded as comparatively weaker; practitioners treat it as a local, economical stand-in where genuine Huang Lian is unavailable rather than an equivalent replacement.
Western Herbalism Properties
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Botanical Description
Tu Huang Lian is the root and stem of Berberis julianae (Berberidaceae), the wintergreen barberry, a dense evergreen shrub 1 to 3 metres tall. The pale wood and roots are vivid yellow internally, reflecting a high content of berberine and related isoquinoline alkaloids that give the drug its bitter, cold, heat-clearing action. Stems bear stout three-parted spines, and the leathery, elliptic to lanceolate leaves are clustered at the nodes with sharply spiny-toothed margins. In spring, dense axillary fascicles of ten to twenty-five small, fragrant, yellow flowers appear, followed by oblong, blue-black berries covered in a waxy bloom. The root and stem are harvested and dried for medicinal use.
Grows in thickets, forest margins, roadsides and slopes at 300-2500 m in central and southern China, and is widely cultivated as an ornamental hedge.
Active Constituents
Berberine
Quaternary protoberberine isoquinoline alkaloidThe dominant alkaloid of Berberis root and root bark and the compound that gives Tu Huang Lian its yellow colour, its bitter taste and its whole clinical rationale as a heat-clearing, damp-drying drug. Note that no validated quantitative assay of berberine in Berberis julianae has been published in the accessible literature; the only species-specific phytochemical study located is a brief 1977 Slovak report. Content figures quoted for barberry are usually from Berberis vulgaris or Berberis aristata and should not be transferred to this species.
Berbamine
Bisbenzylisoquinoline alkaloidA bisbenzylisoquinoline of the genus Berberis with reported anti-arrhythmic, vasodilatory and calcium-channel-blocking activity in preclinical work. Its presence in Berberis julianae is inferred from the genus rather than quantified for this species; its cardiovascular pharmacology is the reason a Berberis root is not pharmacologically interchangeable with Coptis, which lacks it.
Palmatine
Quaternary protoberberine alkaloidA routine co-occurring protoberberine in Berberis root and root bark, assayed together with berberine, jatrorrhizine and berbamine in HPLC methods for barberry drugs.
Jatrorrhizine
Quaternary protoberberine alkaloidA minor protoberberine of Berberis root bark, again reported for the genus rather than measured in Berberis julianae. Alkaloid content in Berberis varies markedly by species, geographic origin and plant part, so a Tu Huang Lian sample cannot be assumed to match published barberry figures.
⚠ Drug Interactions
Ciclosporin (cyclosporin A)
In renal transplant recipients, 0.2 g of berberine three times daily raised ciclosporin trough concentrations by 88.9% and the concentration/dose ratio by 98.4% over three months; in a formal pharmacokinetic sub-study, ciclosporin AUC rose 34.5% and apparent oral clearance fell 40.4% after 12 days of berberine (Wu et al., Eur J Clin Pharmacol 2005). The mechanism is inhibition of CYP3A4 and of P-glycoprotein-mediated efflux. The study used isolated berberine rather than a Berberis julianae preparation, but berberine is the principal alkaloid of the drug and the dose used is within reach of a crude-drug decoction.
Clinical note: Treat any berberine-rich root (Berberis, Coptis, Phellodendron, Mahonia) as contraindicated in transplant recipients unless ciclosporin levels are being monitored and the dose adjusted; the effect is large enough to matter within days.
CYP3A4, CYP2D6 and CYP2C9 substrates (e.g. midazolam, dextromethorphan, losartan)
In a randomised two-phase crossover study in healthy men, berberine 300 mg three times daily for two weeks increased the urinary dextromethorphan/dextrorphan ratio ninefold (CYP2D6), doubled the losartan/E-3174 ratio (CYP2C9), and raised midazolam AUC by 40% while cutting its oral clearance by 27% (CYP3A4). CYP2C19 and CYP1A2 probes were unaffected (Guo et al., Eur J Clin Pharmacol 2012). Again the study drug was isolated berberine, not the crude root.
Clinical note: The CYP2D6 effect is the one to remember: expect meaningfully higher exposure to codeine-derived analgesics, tamoxifen, metoprolol, many antidepressants and antipsychotics. Space dosing and re-check clinical effect rather than assuming a herbal dose is too small to matter.
Huang Lian (Coptis chinensis) and other Pharmacopoeia berberine drugs, in substitution
Tu Huang Lian means literally local or native goldthread, and the name is applied regionally to several unrelated berberine-bearing roots, Berberis julianae among them, used as cheaper stand-ins for Coptis. The substitution is not chemically neutral: Berberis roots carry bisbenzylisoquinolines such as berbamine that Coptis does not, and total berberine content in Berberis varies widely with species, origin and plant part, so potency is not predictable from the label. The Latin name given for this record, Herba Berberis Julianae, also conflicts with the drug as actually collected and studied, which is the root and root bark rather than the aerial parts.
Clinical note: Confirm which botanical the supplier means by Tu Huang Lian before substituting it for Huang Lian, and do not assume equivalent dosing. Treat it as a berberine drug for interaction purposes regardless of which genus it turns out to be.
Dosage Calculator
⚖ Dosage Calculator
A weight-based mathematical estimate for Tu Huang Lian. Not a prescription.
Evidence Tier
2 RCTs · 3 studies on recordRecorded 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
2
2 verified · 0 unverified
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
Antidiabetic Effect of Methanolic Extract from Berberis julianae Schneid. via Activation of AMP‐Activated Protein Kinase in Type 2 Diabetic Mice
The only species-specific pharmacology study located. A methanolic extract of air-dried Berberis julianae roots, given orally at 60, 120 and 240 mg/kg/day for 21 days to high-fat-diet plus low-dose streptozotocin diabetic mice, improved oral glucose tolerance, lowered glucose, LDL cholesterol and body weight, increased GLUT4 translocation 1.8-fold in L6 myotubes and stimulated AMPK phosphorylation in liver and muscle, with metformin as comparator. The paper reports no chemical characterisation of the extract, so the result cannot be attributed to berberine or to any named constituent, and it is a mouse study with no human follow-up.
Effects of berberine on the blood concentration of cyclosporin A in renal transplanted recipients: clinical and pharmacokinetic study
52 renal transplant recipients took ciclosporin plus berberine 0.2 g three times daily for three months and 52 took ciclosporin alone; trough concentrations rose 88.9% and concentration/dose ratios 98.4% in the berberine arm. A six-patient pharmacokinetic study showed ciclosporin AUC up 34.5% and apparent oral clearance down 40.4% after 12 days of berberine. This is a study of isolated berberine, not of Berberis julianae, and is cited here because berberine is the drug's principal alkaloid.
Repeated administration of berberine inhibits cytochromes P450 in humans
A two-phase randomised crossover study in healthy men. After two weeks of berberine 300 mg three times daily, CYP2D6 activity fell sharply (dextromethorphan/dextrorphan ratio up ninefold), CYP2C9 activity fell (losartan/E-3174 ratio doubled) and CYP3A4 activity fell (midazolam AUC up 40%, oral clearance down 27%); omeprazole and caffeine probes showed no change, so CYP2C19 and CYP1A2 were unaffected. Again this is isolated berberine rather than a Berberis julianae preparation.
References
- B. Brazdovicova, D. Kostalova, A. Zubakova. Phytochemical research of the species Berberis julianae C.K.Schneider . Ceskoslovenska Farmacie 1977;26(4):131-2 (in Slovak), PMID 880638 (1977)
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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