Wu Shao She (Zaocys, Black Striped Snake)

Chinese Herb Actions

Chinese Herb Dosage

• What is the typical dosage of Wu Shao She?

  Our record gives 5–10 g in decoction and 2–3 g as powder (Chen & Chen), with Bensky giving a slightly wider decoction range of 4.5–12 g. The two figures are not interchangeable: the powder is taken directly rather than boiled, so the material is not diluted by extraction, and a powdered dose is roughly a third to a half of the decoction dose.

  • Decoction — 5–10 g (Chen & Chen); 4.5–12 g (Bensky). Both ranges are held on this record and both are in common use.
  • Powder — 2–3 g taken directly (Chen & Chen). Powdered animal medicinals are dosed on a different scale and are not substituted gram-for-gram for the decoction amount.
  • Medicinal wine — a long-standing traditional preparation for chronic wind-damp painful obstruction, shared with the other snake medicinals. Recorded here as a classical preparation, not as a home method.

  For comparison within the group: Bai Hua She, the stronger and toxic-classified snake, is given at 3–10 g on its own record; She Tui (snake slough) is far smaller again at 2–3 g in decoction and 0.3–0.6 g in powder. Wu Shao She sits at the largest and mildest end of the three.

  Source: Sacred Lotus sources & references (the recorded ranges for Wu Shao She, Bai Hua She and She Tui, attributed as held on file to Chen & Chen and Bensky). Reference only — not a prescription.

Chinese Herb Contraindications & Cautions

• Are there cautions for Wu Shao She?

  Our record states “none noted,” and adds one traditional handling convention: contact with metal was avoided. That is genuinely unusual for a wind-damp herb and reflects its mild, non-toxic classification. The realistic cautions are contextual — what the material is, where it comes from, and what else may be in it — rather than pharmacological.

  • Animal-derived (dietary and ethical reference note) — Wu Shao She is a whole dried snake. It is not suitable for vegetarians or vegans, and the animal source should be disclosed to anyone who asks about ingredient origin.
  • Pattern caution — the general caution for wind-damp dispelling herbs applies: they are drying and dispersing, so blood deficiency, yin deficiency and blood dryness are the settings in which they are used cautiously or not at all. Best used under a qualified practitioner.
  • Traditional handling — contact with metal was traditionally avoided, per our own record. Recorded as a classical convention, not as a preparation instruction.
  • Species substitution — a market survey identified several counterfeit snakes sold as Wu Shao She, so batch identity cannot be assumed from the label alone (see research).
  • Heavy metals (quality reference note) — a national risk assessment of food-homologous Chinese medicines found that the cumulative lead, cadmium and arsenic risk from Zaocys dhumnades exceeded the human tolerance dose in the food-use exposure scenario modelled (PMID 35814235; PMC 9268897). That is a finding about contaminant load in sampled market material, not about the herb’s intrinsic pharmacology, and it is one more reason tested product matters.
  • Parasites in raw snake — a food risk, not a decoction risk — wild snakes sold in Chinese food markets carry very high rates of Spirometra plerocercoids, the larvae that cause human sparganosis; one Hunan survey found them in 99.1% of Zaocys dhumnades examined (PMID 32103785), with comparable findings in Guangdong and Guangzhou markets (PMID 33601814; PMID 21348631). Infection in people follows eating raw or undercooked snake or applying raw flesh to the skin. This concerns raw snake as food, not the dried, processed and decocted medicinal, and no case has been attributed to prepared Wu Shao She. It is recorded here because readers deserve the distinction rather than the rumour.
  • Sourcing and legality — international trade in medicinal snakes is regulated and reported under CITES (see research). Legal status varies by country and by species; anyone importing or dispensing snake-derived material outside China should check current local regulations.

  Source: Sacred Lotus sources & references (recorded cautions, “none noted,” and the metal-contact note, as held on file); category cautions per published materia medica consensus; contaminant, parasite and trade research cited below. Neutral reference disclosures, not usage instructions.

Chinese Herb Toxicity & Overdose

• Is Wu Shao She toxic or venomous?

  No on both counts — and the two questions are worth separating, because people conflate them. The source animal is a non-venomous colubrid snake, so there is no venom in the material at all; and unlike Bai Hua She, our record does not classify Wu Shao She as toxic. This is the substantive reason it is the milder of the two and carries the larger dose.

  What our record does note is an overdose picture: reactions attributed to excessive dose are muscle stiffness, reduced physical activity and respiratory depression. Those are dose-ceiling reference facts, not effects expected within the ranges given above.

  • Not venomous — the source species belongs to the family Colubridae, a group of non-venomous snakes; the taxonomic placement is confirmed in the reference databases cited below. There is no venom component to the medicinal.
  • Not classified toxic — unlike Bai Hua She, which our record marks as toxic, Wu Shao She carries no toxicity classification in the traditional literature.
  • The practical risks are quality risks — substitution with other snake species, and contaminant load in commercial material, are the realistic concerns (see cautions and research).

  Source: Sacred Lotus sources & references (recorded overdose reactions, and the absence of a toxicity classification, as held on file); family placement per the taxonomic databases and authentication literature cited below. Reference note, not a safety guarantee and not a dosing instruction.

Herb-Drug Interactions

• Does Wu Shao She interact with medications?

  No clinical herb–drug interaction is documented for Wu Shao She, and no human pharmacokinetic study of it could be found. Unlike the venomous snake medicinals, there is no venom-protein literature here to raise an anticoagulation flag from — the source animal produces no venom. One laboratory observation is worth practitioner awareness rather than concern: soluble total proteins from Zaocys dhumnades reduced interleukin-1β and tumour necrosis factor-α and increased interleukin-10 in cultured human rheumatoid synoviocytes (PMID 19861243). That is an isolated-fraction cell study, not evidence of an interaction, but it is the kind of immunomodulatory signal a practitioner would want on file for patients on immunosuppressant or biologic therapy. (Precautionary; flagged for practitioner confirmation.)

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

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

• Which snake is Wu Shao She, and is the name still current?

  Wu Shao She is the Chinese ratsnake, a large non-venomous colubrid. Our record gives the pharmaceutical Latin as Zaocys Dhumnades. In current zoological taxonomy Zaocys dhumnades is treated as a synonym and the accepted name is Ptyas dhumnades (Cantor, 1842), family Colubridae — the change is a genus reassignment, not a change of animal, and the pharmaceutical literature continues to use the older name. A 2010 review of animal-derived materials in the Chinese Pharmacopoeia specifically proposed taxonomic and Latin-name amendments for this and fourteen other animal medicinals, so the mismatch is a recognised issue in the field rather than an error unique to us (PMID 21046726).

  Identity note flagged, not corrected: our Latin field reads Zaocys Dhumnades, which is the standard pharmaceutical name and matches the research literature, but is a taxonomic synonym of the currently accepted Ptyas dhumnades. We have left the field exactly as held; whether to add the accepted binomial alongside it is an owner decision.

  Is Wu Shao She endangered or protected?

  We do not state a conservation category for this species, because we could not verify a current listing from a resolvable source — and inventing one would be worse than saying so. What can be stated is the trade context. An analysis of official CITES trade data from 1975 to 2023 found China’s legal snake trade exceeded 11.7 million whole-organism equivalents, driven by the domestic “medicine and food homology” culture, with the country shifting from a supply centre in the early 1990s to a consumption hub by 2012; colubrid snakes made up 81.5% of exports, and the oriental ratsnake Ptyas mucosa — a close relative of this species, and one of its documented market adulterants — accounted for 56.8% of exports on its own. Both wild-sourced and captive-bred supply chains persist, and the authors identified misreported species in the official data (PMID 42278059; PMC 13255723; DOI 10.3390/ani16111624). Check the current listing for the specific species before making any sourcing or legal claim.

  Is there modern research on Wu Shao She (Zaocys dhumnades)?

  Yes, but almost all of it is about proving the material is what the label says, not about whether it works. There are no controlled clinical trials of the single herb, so nothing here supports a therapeutic claim.

  • Adulteration is documented and specific — a market investigation collected authentic and counterfeit Wu Shao She and identified the substitutes being sold as it: Ptyas korros, Ptyas mucosus, Naja atra, Sinonatrix annularis and Dinodon septentrionalis. The authors describe the diagnostic features of the genuine article — the “sword ridge” back, the “iron tail,” and strongly ribbed scales (PMID 31090287).
  • Molecular authentication — a cytochrome b PCR test kit was developed and benchmarked against the Chinese Pharmacopoeia method, detecting as little as 0.025 g of specimen with 100% specificity (PMID 28035866). COI barcoding has been applied to snake medicine of this genus (PMID 24857374), DNA barcoding evaluated across the commonly used medicinal snakes (PMID 26087547), and a one-step fluorescent PCR method using cationic conjugated polymers distinguished Zaocys dhumnades from Deinagkistrodon acutus, Bungarus multicinctus and 48 look-alike specimens by eye (PMID 26537289; PMC 4633673).
  • Anti-inflammatory signal (cell study) — soluble total proteins from this snake, at 150 and 450 µg/mL, lowered interleukin-1β and tumour necrosis factor-α and raised interleukin-10 in fibroblast-like synoviocytes taken from rheumatoid arthritis patients (PMID 19861243). Cultured cells only, and an isolated protein fraction rather than the dispensed herb — but it is at least aimed at the traditional indication.
  • In a multi-herb clinical study — a network-pharmacology-plus-clinical paper on Jishe Qushi capsules, a compound formula containing Zaocys dhumnades, reported reduced morning stiffness, joint pain and inflammatory markers when added to methotrexate in 49 rheumatoid arthritis patients versus 50 controls (PMID 37653836; PMC 10470707). This is evidence about a multi-ingredient product, not about Wu Shao She alone, and the design does not isolate any single herb.
  • Contaminants and parasites — see the cautions section for the heavy-metal risk assessment (PMID 35814235; PMC 9268897) and the sparganosis surveys of market snakes (PMID 32103785; PMID 33601814; PMID 21348631), both of which are quality and food-safety findings rather than pharmacology.

  Honest summary: the traditional indication — chronic painful obstruction — has one supportive cell study and one multi-herb clinical study behind it, and nothing more. The bulk of the literature exists because substitution is a real market problem.

  Sources: PMID 31090287 (market adulterants and identifying features); PMID 28035866 (cytochrome b PCR authentication kit); PMID 24857374 (COI barcode); PMID 26087547 (DNA barcoding of medicinal snakes); PMID 26537289, PMC 4633673 (fluorescent PCR discrimination); PMID 19861243 (soluble proteins in rheumatoid synoviocytes, cell study); PMID 37653836, PMC 10470707 (multi-herb capsule in rheumatoid arthritis); PMID 35814235, PMC 9268897 (heavy-metal cumulative risk assessment); PMID 32103785, PMID 33601814, PMID 21348631 (Spirometra in market snakes); PMID 42278059, PMC 13255723, DOI 10.3390/ani16111624 (CITES-based analysis of China’s snake trade); PMID 21046726 (proposed Pharmacopoeia amendments to animal-medicinal Latin names); taxonomic placement of Ptyas dhumnades (Colubridae) per the GBIF Backbone Taxonomy. Research context, not a therapeutic claim.

Chinese Herb Notes

• How is Wu Shao She different from Bai Hua She?

  The single most useful difference is that Wu Shao She is not venomous and is not classified as toxic, while Bai Hua She is both. They fill the same role — wind-damp dispelling animal medicinals that penetrate to the channels, bones and skin — but at different strengths, and the safety profiles are genuinely different rather than nominally different.

  • Wu Shao She (this page) — a non-venomous colubrid; sweet, salty, neutral, with no toxicity recorded; Liver and Spleen channels; the milder, safer, larger-dose option for the same indications, and the usual first choice where the pattern does not demand a stronger agent.
  • Bai Hua She — sweet, salty, warm and toxic on its own record; Liver and Spleen channels; described as searching and penetrating, reserved for chronic and obstinate cases, used under professional supervision. The name has been applied to more than one venomous snake — a pit viper and a krait — which is why its Latin name on this site carries both.
  • She Tui (snake slough) — not the snake but the shed skin; sweet, salty, neutral; Liver channel only. Used mainly for skin conditions, childhood convulsions and eye disorders rather than for deep painful obstruction, and dosed an order of magnitude lower.

  Which “she” herbs are actually snakes?

  Only three of the medicinals held on this site are snake-derived: Wu Shao She, Bai Hua She and She Tui. The syllable she does different work in the other names, and the resulting collisions are a well-known source of error.

  • Bai Hua She She Cao — “white-flowered snake-tongue grass,” the whole herb of Hedyotis / Oldenlandia diffusa; bitter, sweet, cold; a heat-clearing, toxin-resolving plant. One syllable pair away from a dried venomous snake.
  • She Gan — Belamcanda rhizome, a bitter cold Lung herb for sore throat. A plant.
  • She Chuang Zi — Cnidium fruit, a warm seed for external application. A plant.
  • She Xiang — deer musk, an aromatic orifice-opening substance. Animal, but not a snake.

  Formula context: our own formula records do not currently link Wu Shao She to any formula, so no formula is named here.

  Source: Sacred Lotus sources & references (the herb records for Wu Shao She, Bai Hua She, She Tui, Bai Hua She She Cao, She Gan, She Chuang Zi and She Xiang — identity, nature, flavour, channels and dosage — as held on file); non-venomous status per the family placement cited in the research section. Disambiguation note, not treatment advice.