Xuan Shen
StarScrophularia ningpoensis Hemsl.
Traditionally used for
- Nose & throat
- Cough & breathing
- Bowel health
Cautions & contraindications
- Heart conditions
- Toxic — professional use only
☯ TCM Properties
Clears Heat and Cools the Blood; Nourishes Yin and Generates Fluids; Purges Fire and Resolves Toxicity; Dissipates Nodules and Softens Hardness
Traditional Chinese Uses
Xuan Shen (figwort root, scrophularia) is a cool, salty herb that both nourishes Yin and clears Fire — making it one of the few herbs that addresses the combined pattern of Yin deficiency with fire flaring. It is used for sore throat, swollen glands, and neck nodules from Heat toxin or Phlegm-Fire, as well as for the bone-steaming heat and constipation of Yin deficiency with internal heat. Its salty softening action makes it useful for hard lumps and accumulations, including thyroid and lymph node swellings.
Used In Formulas (8)
Relationships
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Botanical Description
Scrophularia ningpoensis is a tall herbaceous perennial in the Scrophulariaceae, native to central and eastern China, where it grows in moist, shaded sites along forest margins, stream banks and grassy slopes between 800 and 2,400 m elevation. Plants reach 60-150 cm tall from a cluster of thick, fleshy, spindle-shaped roots that are pale grey-brown outside and turn black on drying. The erect, four-angled stems are usually unbranched below and bear opposite, ovate to elliptic-lanceolate leaves 7-20 cm long, with serrate margins, pointed tips and short petioles. In summer to early autumn the species produces narrow, open, terminal panicles of small dingy yellow-green to dull purple flowers, each tubular with a two-lipped limb about 8 mm long. The fruits are ovoid capsules containing many small, angular seeds. The species is cultivated in Zhejiang Province, where the roots are lifted in late autumn and steamed or sweated before drying.
Active Constituents
Harpagoside
Iridoid glycosideConcentration: 0.24 plus or minus 0.04 percent of the dried root in first-grade material, 0.21 plus or minus 0.04 percent in second grade and 0.11 plus or minus 0.03 percent in third grade
One of the two iridoid markers used for Scrophulariae Radix in the 2020 Chinese Pharmacopoeia, and the compound most often used to justify the drug. Its documented activity is neuroprotective rather than anti-inflammatory: in rotenone-injured Neuro-2A cells it improved survival, suppressed nitric oxide generation and reduced alpha-synuclein nitration through NF-kappaB/NOS signalling, and protected mitochondrial complex I activity. In human neutrophils it showed no significant anti-inflammatory effect, which is an awkward result for a heat-clearing herb standardised on it.
Harpagide
Iridoid glycosideConcentration: quantified alongside harpagoside as the paired Chinese Pharmacopoeia (2020) marker for Scrophulariae Radix
Co-marker with harpagoside. It alleviated sepsis-induced acute respiratory distress in mice by reshaping the gut microbiota toward acetate production, acting through the FFAR2 receptor; the effect disappeared under antibiotic depletion and in Ffar2 knockouts. Like harpagoside, it showed no significant direct anti-inflammatory effect in the neutrophil ROS assay.
Angoroside C
Phenylpropanoid (cinnamic acid) glycosideConcentration: the most abundant cinnamic acid glycoside of the root; quantified routinely alongside cinnamic acid and harpagoside
The strongest candidate for the herb's actual heat-clearing activity. It inhibited fMLF-induced total ROS generation by activated human neutrophils with an IC50 of 0.34 micromolar, and the chemometric study that measured this proposed it as a better chemical marker for the herb than the currently regulated iridoids.
Acteoside (verbascoside) and isoacteoside
Phenylethanoid glycosideThe most potent anti-inflammatory compounds identified in the root: IC50 0.04 to 0.12 micromolar against fMLF-stimulated ROS generation in human neutrophils, roughly an order of magnitude more potent than angoroside C and far more potent than the iridoid markers. Their activity in that assay was attributed to oxygen radical scavenging.
Cinnamic acid
Phenylpropanoid (aromatic carboxylic acid)Concentration: 0.08 plus or minus 0.01 percent of the dried root in first-grade material, falling to 0.03 plus or minus 0.006 percent in third grade
Declines in step with harpagoside across commercial grades, which makes the two useful together as a grading signal. It is one of the four components followed in rat pharmacokinetic work on the herb.
Acetylharpagide
Iridoid glycosideReported from Scrophularia ningpoensis and cytoprotective alongside harpagoside in rotenone-treated Neuro-2A cells. Not a pharmacopoeial marker and not routinely quantified in commercial material.
⚠ Drug Interactions
Li Lu (Veratrum nigrum and other Veratrum species)
Xuan Shen is one of the shen herbs named in the Eighteen Incompatibilities (shi ba fan), whose verse places all the shen, plus Xi Xin and Shao Yao, in opposition to Li Lu; the prohibition for Xuan Shen specifically is set out in the Ben Cao Gang Mu. The hazard is real independently of the classical rule. Veratrum nigrum contains steroidal alkaloids of the jervine and veratrum-ester types with a narrow margin between emetic and cardiotoxic doses, producing bradycardia, hypotension and arrhythmia, and its toxicity and incompatibility are the subject of a dedicated 2024 review. Experimental work on the incompatibility pairs has been done for Veratrum with ginseng and with asarum rather than with Scrophularia, so no mechanism specific to this pair has been demonstrated; the interaction is classified Theoretical on that ground, not because the risk is small.
Clinical note: Do not combine. Li Lu is rarely dispensed in modern practice, but check patent and imported formulas, which is where it turns up unannounced. If a patient has taken the combination, the assessment to make is Veratrum poisoning, not a herb-herb reaction: check pulse, blood pressure and ECG.
Scrophularia buergeriana, S. kakudensis and S. yoshimurae supplied as Radix Scrophulariae
These three congeners are documented adulterants of Scrophulariae Radix, and a 2025 RAD-seq study was undertaken specifically because conventional identification could not reliably separate them from S. ningpoensis. The substitution is not cosmetic: harpagoside content in HPLC-MS analysis was 1.94 plus or minus 0.24 mg/g in S. buergeriana against 6.47 plus or minus 0.02 mg/g in S. koraiensis and 5.50 plus or minus 0.02 mg/g in S. takesimensis, a more than threefold spread across Scrophularia species. S. buergeriana is also an accepted botanical source of Scrophulariae Radix in Korean practice, so the same Latin drug name can lawfully mean a different plant depending on where the material was bought.
Clinical note: Specify Scrophularia ningpoensis by binomial when ordering, and treat Korean-sourced Scrophulariae Radix as potentially S. buergeriana. Where dosing is being titrated to effect, do not carry the dose across a change of supplier.
Digoxin and other cardiac glycosides
Recorded to stop a species confusion propagating. Western herbal sources carry a cardiac glycoside caution for figwort, which refers to Scrophularia nodosa. Scrophularia ningpoensis is a different species, and the two comprehensive reviews of it catalogue more than 162 compounds across iridoids and iridoid glycosides, phenylpropanoid glycosides, organic acids, volatile oils, terpenoids, saccharides, flavonoids, sterols and saponins, with no cardenolides among them. The reviews do describe cardiovascular activity, including an anti-ventricular-remodelling effect, but that is not glycoside pharmacology.
Clinical note: Do not apply a Scrophularia nodosa monograph to this herb. No digoxin level monitoring is indicated on the strength of Xuan Shen alone.
Insulin, sulfonylureas and other glucose-lowering drugs
Scrophulariae Radix is used clinically in China for diabetes, and its anti-inflammatory, antioxidative and immunomodulatory constituents are reviewed for that indication. The supporting work is preclinical and review-level; no human pharmacodynamic study of the herb with a glucose-lowering drug was found, and no magnitude of effect can be given.
Clinical note: In a patient on insulin or a sulfonylurea, ask them to monitor capillary glucose more closely for the first two weeks of a Xuan Shen containing formula. No dose change should be made pre-emptively.
Levothyroxine and antithyroid drugs (carbimazole, methimazole, propylthiouracil)
Scrophulariae Radix is a standard component of Chinese formulas for goitre and thyroid disorders and is reviewed specifically for its mechanisms in thyroid disease. No pharmacokinetic or pharmacodynamic study of the herb with levothyroxine or an antithyroid drug was located, so the direction and size of any effect are unknown.
Clinical note: If the herb is started or stopped in a patient on thyroid replacement or suppression, bring forward the next thyroid function test rather than assuming stability.
Dosage
| Form | Amount | Frequency | Duration | Population | Notes |
|---|---|---|---|---|---|
| decoction | 9–15 g | Daily | — | — | 中国药典 2020 【用法与用量】9～15g。 【注意】不宜与藜芦同用。 【性味与归经】甘、苦、咸，微寒。归肺、胃、肾经。 — Chinese Pharmacopoeia 2020, quoted verbatim; route and cautions preserved. Replaces a cleared category-filler value. |
Dui Yao — Herb Pairs
The classical two-herb combinations this herb appears in, each with an action neither herb has alone.
The moistening, yin-nourishing herb restrains the drying herb while the drying herb strengthens the spleen, a balanced pair Shi Jinmo used for wasting-thirst.
Named pairing — Lü Jingshan, Shi Jinmo Dui Yao
Clearing heat and nourishing yin is combined with moistening the lung and stomach, together increasing fluids to moisten dryness.
Core pair of a classical formula — Zeng Ye Tang, Wen Bing Tiao Bian (Wu Jutong)
Cooling the blood and nourishing yin are combined with generating fluids, moistening dryness caused by heat damaging yin.
Constipation from depleted fluids in warm disease, dry mouth.
Core pair of a classical formula — Zeng Ye Tang, Wen Bing Tiao Bian (Wu Jutong)
Clears heat, transforms phlegm and dissipates nodules while cooling and nourishing yin to soften hardness.
Scrofula and phlegm nodules from yin deficiency with phlegm-fire.
Core pair of a classical formula — Xiao Luo Wan, Yi Xue Xin Wu (Cheng Guopeng, 1732)
Evidence Tier
Moderate evidence · 4 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
0 verified · 4 unverified
Show 4 studies
- Chemometric-guided chemical marker selection: A case study of the heat-clearing herb Scrophularia ningpoensis
- Reduced levels of nitrated α-synuclein in the protective effect of harpagoside on rotenone-induced cellular models of Parkinson’s disease
- Protective effects of harpagoside on mitochondrial functions in rotenone‑induced cell models of Parkinson's disease
- Determination and Pharmacokinetic Profiles of Four Active Components From Scrophularia ningpoensis Hemsl. in Rats
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
Chemometric-guided chemical marker selection: A case study of the heat-clearing herb Scrophularia ningpoensis
Built an anti-inflammatory metabolomic pattern for the root using multi-informative molecular networking, then validated it against ROS generation by activated human neutrophils. Cinnamic acid glycosides scored highest: all compounds from the bioactive molecular families inhibited fMLF-promoted total ROS dose-dependently with IC50 values of 0.04 to 0.42 micromolar (acteoside and isoacteoside 0.04 to 0.12 micromolar, angoroside C 0.34 micromolar), while compounds from the non-bioactive clusters, which include the regulated iridoids harpagide and harpagoside, showed no significant effect. The authors propose angoroside C rather than the iridoids as the chemical marker for this species.
Reduced levels of nitrated α-synuclein in the protective effect of harpagoside on rotenone-induced cellular models of Parkinson’s disease
Three iridoids from Scrophularia ningpoensis, harpagoside, acetylharpagide and harpagide, were tested against rotenone injury in Neuro-2A neuronal and BV-2 microglial cells, with catalpol as reference. Acetylharpagide and harpagoside were substantially cytoprotective. Harpagoside suppressed nitric oxide generation and inhibited alpha-synuclein nitration, with pathway analysis implicating NF-kappaB/NOS/NO signalling.
Protective effects of harpagoside on mitochondrial functions in rotenone‑induced cell models of Parkinson's disease
Harpagoside in rotenone-treated differentiated Neuro-2A cells. At 10 micromolar it raised cell survival; from 0.1 micromolar it reduced mitochondrial swelling; at 1 micromolar it countered rotenone inhibition of complex I; and at 10 micromolar it inhibited caspase 3 activation. Note that the authors describe harpagoside as obtainable from Scrophularia buergeriana, S. striata and Harpagophytum procumbens as well, so the finding is about the compound, not uniquely about this species.
Determination and Pharmacokinetic Profiles of Four Active Components From Scrophularia ningpoensis Hemsl. in Rats
Determined and compared the pharmacokinetic profiles of four active components of Scrophularia ningpoensis in rats, establishing that the marker compounds show distinct absorption and metabolic behaviour rather than moving together. This matters for dosing logic: standardising on one iridoid does not predict systemic exposure to the phenylpropanoid glycosides that carry most of the in vitro anti-inflammatory potency.
⚠ Rule-Based Cautions
These entries come from the deterministic rule tables that gate Verscienta's formula tools — classical pair prohibitions, pregnancy and lactation contraindications, and dose ceilings.
Incompatibilities (十八反 / 十九畏)
- 十八反: Li Lu × Xuan Shen — avoid combining with Li Lu / Veratrum
Historical Texts
Shen Nong Ben Cao Jing
Han dynastyBen Cao Gang Mu (Compendium of Materia Medica), Li Shizhen
Ming dynasty, 1596Ben Cao Jing Ji Zhu (Collected Commentaries on the Classic of Materia Medica), Tao Hongjing
Southern and Northern dynasties, circa 500 CEReferences
- Zhang Q, Liu A, Wang Y. Scrophularia ningpoensis Hemsl: a review of its phytochemistry, pharmacology, quality control and pharmacokinetics . Journal of Pharmacy and Pharmacology (2021) [DOI]
- Ren D, Shen ZY, Qin LP, Zhu B. Pharmacology, phytochemistry, and traditional uses of Scrophularia ningpoensis Hemsl . Journal of Ethnopharmacology (2021) [DOI]
- Lu YA, Liu SJ, Hou SY, Ge YY, Xia BH, Xie MX. Metabolomics distinguishes different grades of Scrophularia ningpoensis hemsl: Towards a biomarker discovery and quality evaluation . Heliyon (2024) [DOI]
- Zhang M, Chen K, Feng C, Zhang F, Zhang L, Li Y. The Comprehensive Profiling of the Chemical Components in the Raw and Processed Roots of Scrophularia ningpoensis by Combining UPLC-Q-TOF-MS Coupled with MS/MS-Based Molecular Networking . Molecules (2024) [DOI]
- Guo L, Wang X, Li H, Zhou M, Liu L, Wang R, Li P. Using RAD-seq to identify and differentiate the medicinal herb Scrophularia ningpoensis and its adulterants . BMC Genomics (2025) [DOI]
- Nam HH, Lee AY, Seo YS, Park I, Yang S, Chun JM, Moon BC, Song JH, Kim JS. Three Scrophularia Species (Scrophularia buergeriana, S. koraiensis, and S. takesimensis) Inhibit RANKL-Induced Osteoclast Differentiation in Bone Marrow-Derived Macrophages . Plants (2020) [DOI]
- Song J, Li J, Shi H, Liu H, Qu Y, Wang F. The mechanism and application of Scrophulariae Radix in the treatment of endocrine disorders: focusing on thyroid diseases and diabetes mellitus . Frontiers in Endocrinology (2025) [DOI]
- Zhao X, Li S, Xiang Z. Veratrum nigrum L.: A comprehensive review of ethnopharmacology, phytochemistry, pharmacology, pharmacokinetics and metabolism, toxicity, and incompatibility . Journal of Ethnopharmacology (2024) [DOI]
- Su L, Deng Y, Chen N, Zhang X, Huang T. Infrared-assisted extraction followed by high performance liquid chromatography to determine angoroside C, cinnamic acid, and harpagoside content in Scrophularia ningpoensis . BMC Complementary and Alternative Medicine (2019) [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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