Xuan Shen (Ningpo Figwort Root)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Xuan Shen?

  Roughly 9–30 g in decoction, the part used being the root. To better benefit the Yin (rather than simply clear heat), Xuan Shen is traditionally dry-fried in salt (salá cháo, 盐炒) before use, a preparation noted in the classical Yin-tonifying literature.

  Source: Sacred Lotus reference notes; standard materia medica dosage ranges (Bensky & Barolet). Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Xuan Shen, and is it incompatible with any other herb?

  Xuan Shen is cold and can aggravate digestion — it is contraindicated in patients with diarrhea, or dampness affecting the Spleen or Stomach. It has also been noted to antagonize Gan Jiang (Rhizoma Zingiberis), Huang Qi (Radix Astragali), Da Zao (Fructus Zizyphi Jujubae), and Shan Zhu Yu (Fructus Corni).

  Classical incompatibility: Xuan Shen is listed among the “Eighteen Incompatibilities” (Shí Bà Fàn) as incompatible with Li Lu (Rhizoma et Radix Veratri) — a rule grouping the “shen” tonics (Ren Shen, Dang Shen, Xuan Shen, Dan Shen, Ku Shen), Xi Xin, and Shao Yao as all clashing with Li Lu. This pairing is traditionally avoided in formula composition.

  Source: Sacred Lotus reference notes; the Eighteen Incompatibilities (Shi Ba Fan) as recorded in Bensky & Barolet, Materia Medica (3rd ed.) and standard materia medica references. Reference note, not medical advice.

Herb-Drug Interactions

• May interact with anti-diabetic medications. Xuan Shen has traditionally been flagged as potentially interfering with anti-diabetic drugs; patients on blood-glucose-lowering medication should have this checked by their practitioner and physician. This is a precautionary flag, not a demonstrated clinical interaction.

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

Provided as research context — a summary of published biomedical study, not a therapeutic or medical claim.

• Is there modern research on Xuan Shen (Scrophularia ningpoensis)?

  Yes — preclinical (cell and animal) research supports anti-inflammatory, antioxidant, and anti-proliferative activity, with no large human clinical trials yet published. Chemically, the root is rich in iridoid glycosides (harpagoside is its major marker compound, roughly 5% of the root), phenylpropanoid glycosides, saponins, and amino acids.

  • Anti-inflammatory / antioxidant (preclinical) — polysaccharides extracted from S. ningpoensis root showed strong antioxidant activity across several assays and reduced IL-6 and TNF-α expression in lipopolysaccharide-challenged mice, supporting the traditional heat-clearing/fire-toxicity use. Animal/laboratory study.
  • Anti-proliferative / NF-κB signaling (in vitro) — an aqueous extract inhibited proliferation and induced apoptosis in keratinocyte and melanoma cell lines by suppressing TNF-α-induced NF-κB translocation; isolated compounds were inactive alone but synergistic in combination. Cell-line study, not clinical evidence.
  • Comprehensive review — a 2021 pharmacognosy review catalogs over 160 isolated compounds and summarizes reported cardiovascular-protective, immune-modulating, anti-inflammatory, and antioxidant pharmacology, while noting that clinical (human) research remains limited relative to the preclinical literature.

  Overall: consistent preclinical support for the traditional heat-clearing/anti-inflammatory use; human clinical trials are lacking.

  Sources: PMID 33381217 (polysaccharide antioxidant/anti-inflammatory study, mice); PMID 24288088 (cell-line proliferation/NF-κB study); DOI 10.1093/jpp/rgaa036 (phytochemistry & pharmacology review, Journal of Pharmacy and Pharmacology, 2021). Research context, not a therapeutic claim.

Chinese Herb Notes

• What formulas is Xuan Shen combined in, and what is its role in Zeng Ye Tang?

  Xuan Shen is one of the three herbs in Zeng Ye Tang (“Increase the Fluids Decoction”), alongside Mai Men Dong and Sheng Di Huang — the formula that gives the classical Yin-nourishing strategy its name, treating constipation from Yin/fluid deficiency where the intestines have lost their moistening. Its salty, cold, Yin-nourishing nature is what lets it “increase the fluids to unblock the bowels” without a purgative.

  Xuan Shen also appears in a wide range of other classical formulas confirmed in the Sacred Lotus database, including:

  • Qing Ying Tang (Clear the Nutritive Level Decoction) and Sheng Tie Luo Yin (Iron Filings Decoction) — clearing heat from deeper levels.
  • Pu Ji Xiao Du Yin and Qing Wen Bai Du Yin — clearing fire toxicity in epidemic/toxic-heat presentations.
  • Xiao Luo Wan (Reduce Scrofula Pill) and Si Miao Yong An Tang — resolving phlegm-fire nodules and toxic-heat swellings.
  • Bai He Gu Jin Tang and Yang Yin Qing Fei Tang — nourishing Lung/Kidney Yin for dry cough and sore throat.
  • Tian Wang Bu Xin Dan, Zhen Gan Xi Feng Tang, and Zi Xue Dan — nourishing Yin to anchor the spirit or subdue Liver Yang/wind.

  Source: Sacred Lotus formula–herb database; Bensky & Barolet, Materia Medica (3rd ed.) for the Zeng Ye Tang role. Traditional formula context, not treatment advice.

This herb is incompatible with:

• Li Lu (Radix Et Rhizoma Veratri)