Qin Jiao (Gentiana Macrophylla Root)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Qin Jiao?

  Commonly 3–9 g in decoction (some sources give a wider range up to about 15 g for the fresh root). The dried root or rhizome is the part used; it is typically sliced before decocting.

  Source: Sacred Lotus sources & references, cross-referenced against multiple online sources (standard materia medica ranges). Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Qin Jiao?

  Qin Jiao is best avoided, or used cautiously, in patients with loose stools or diarrhea from Spleen-Yang deficiency, and in long-term use for those with weak, cold digestion — while milder than most wind-damp herbs, its cooling, draining, and moistening qualities can still aggravate a cold, deficient Spleen/Stomach over time.

  Source: Sacred Lotus sources & references, cross-referenced against multiple online sources (materia medica cautions).

Chinese Herb Toxicity & Overdose

• Low. No significant toxicity is reported for Qin Jiao at standard decoction doses; materia medica sources consistently describe it as a well-tolerated herb suitable for prolonged use in chronic Bi syndrome, unlike the more drying, warmer wind-damp herbs it is often grouped with.

  Source: materia medica consensus; no toxicity signal identified in the pharmacology research reviewed below.

Herb-Drug Interactions

• No well-established clinical herb–drug interactions are documented for Qin Jiao. (Flagged for practitioner confirmation if used alongside conventional anti-inflammatory or pain medication for joint disease.)

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 Qin Jiao (Gentiana macrophylla)?

  Yes — preclinical (cell- and animal-model) research on its seco-iridoid glycosides, chiefly gentiopicroside, supports anti-inflammatory and joint-protective effects consistent with its traditional use for wind-damp painful obstruction; no rigorous single-herb human clinical trials were identified.

  • Collagen-induced arthritis (animal model) — iridoid glycosides isolated from Gentiana macrophylla flowers (including gentiopicroside, loganic acid, sweroside, and swertiamarin) reduced paw swelling and arthritis scores and lowered pro-inflammatory markers (TNF-α, IL-1β, IL-6) and joint iNOS/COX-2 expression in a rat collagen-induced arthritis model, at doses roughly comparable to a dexamethasone-treated comparison group.
  • Knee osteoarthritis, synovial inflammation and fibrosis (cell & animal model) — gentiopicroside reduced inflammation and fibrosis in LPS-stimulated synovial cells and in a rat anterior-cruciate-ligament-transection knee-osteoarthritis model, associated with suppression of the HMGB1-mediated PI3K/AKT signaling pathway and reduced TNF-α/IL-1β/IL-6 and fibrosis markers (TGF-β, collagen I, TIMP1, α-SMA).
  • Transdermal delivery (formulation research) — a 2025 study developed hydrogel patches containing Gentiana macrophylla seco-iridoids and reported anti-inflammatory effects with transdermal absorption, exploring a topical delivery route for the plant’s active compounds.

  Taken together, this laboratory and animal evidence offers a plausible pharmacological rationale for Qin Jiao’s traditional use in joint/muscle Bi pain, but it remains preclinical; no controlled human trials specific to Qin Jiao were located.

  Sources: PMID 27180880, DOI 10.1016/j.jep.2016.05.027 (Gentiana macrophylla flower iridoid glycosides, collagen-induced arthritis in rats, J Ethnopharmacol 2016); PMID 39764995, DOI 10.1016/j.intimp.2024.113973 (gentiopicroside, synovial inflammation/fibrosis in knee-osteoarthritis rats, Int Immunopharmacol 2025); PMID 40246085 (Gentiana macrophylla seco-iridoid transdermal hydrogel patches, Fitoterapia 2025). Research context, not a therapeutic claim.

Chinese Herb Notes

• How is Qin Jiao different from Long Dan Cao? They share the genus Gentiana.

  Qin Jiao and Long Dan Cao are both in the genus Gentiana and share a similar-sounding name and family resemblance, but they are very different herbs in practice — Long Dan Cao (Gentiana scabra/Gentiana rigescens, Chinese Gentian Root) is an intensely bitter, cold, fire-draining herb, while Qin Jiao (Gentiana macrophylla) is only mildly cold and belongs to an entirely different functional category. Confusing the two is a real risk given the shared genus, and worth distinguishing explicitly.

  • Qin Jiao (Gentiana macrophylla) — bitter, acrid, only slightly cold; classified among the Herbs that Dispel Wind-Dampness; used for joint/muscle Bi pain (of any thermal character), yin-deficiency steaming-bone heat, and (secondarily) damp-heat jaundice and dry constipation. Gentle enough not to injure yin with prolonged use.
  • Long Dan Cao (Gentiana scabra, “Chinese Gentian Root”) — intensely bitter and cold; classified among the Herbs that Clear Heat and Drain Fire; its signature action is draining excess Liver and Gallbladder fire and clearing damp-heat in the Liver channel and Lower Jiao (red/swollen/painful eyes, migraine-type headache with irritability, genital damp-heat/itching, jaundice) — it is the chief herb in Long Dan Xie Gan Tang, a formula for exactly this kind of excess Liver/Gallbladder fire pattern.

  Key formulas for Qin Jiao (confirmed in Sacred Lotus formula records): Qing Gu San (“Cool the Bones Powder”) for yin-deficiency steaming-bone heat; Juan Bi Tang (“Remove Painful Obstruction Decoction”) for whole-body Wind-Cold-Damp Bi syndrome; and Du Huo Ji Sheng Tang (Angelica Pubescens and Sangjisheng Decoction) for chronic Wind-Damp-Cold Bi complicated by Liver and Kidney deficiency. (Traditional formula context, not treatment advice.)

  Source: Sacred Lotus sources & references (differentiation & combinations); Sacred Lotus formula records for Qing Gu San, Juan Bi Tang, and Du Huo Ji Sheng Tang.