Chuan Wu (Prepared Sichuan Aconite)

Chinese Herb Actions

Chinese Herb Dosage

• What is the reference dosage of Chuan Wu?

  1.5–3 g of the prepared root, decocted first for 30–60 minutes (longer at the higher end) before the other herbs are added. Only the processed form is used internally; it is never taken raw internally. Doses are kept small and are a matter for a qualified practitioner — this is reference information, not a prescription.

  Discrepancy (dose units): the owner’s Five Branches notes give 1–3 qian (≈3–9 g), higher than the modern Chinese Pharmacopoeia range of 1.5–3 g cited here. We present the lower modern range, which reflects contemporary safety standardization of this toxic herb; the older figure reflects historical dosing units.

  Source: owner’s Five Branches notes; Chinese Pharmacopoeia / standard materia medica ranges. Reference only.

Chinese Herb Contraindications & Cautions

• What are the contraindications and cautions for Chuan Wu?

  Chuan Wu is extremely toxic and is used only in its processed form, in small doses, decocted first and long, and only under qualified professional supervision. It is contraindicated in pregnancy and should be avoided in yin-deficient heat or false-cold patterns. It is not combined with alcohol (which increases alkaloid absorption).

  Per the classical Eighteen Incompatibilities, aconite (Wu Tou) is traditionally not combined with Ban Xia, Gua Lou, Bei Mu, Bai Lian, or Bai Ji.

  Discrepancy (incompatibility list): the owner’s notes record “Bai Zhi” in this list, which appears to be a transcription slip for Bai Ji / Bai Lian — the herbs named in the standard Eighteen Incompatibilities, which we follow here.

  Source: owner’s Five Branches notes; classical Eighteen Incompatibilities. Reference facts, not self-use instructions.

Chinese Herb Toxicity & Overdose

• Extremely toxic — use only the processed root, only under qualified supervision. The toxicity comes from diester diterpenoid alkaloids (aconitine, mesaconitine, hypaconitine). Traditional processing — prolonged boiling/steaming — hydrolyzes these into monoester alkaloids reported to be roughly 1/200 to 1/500 as toxic, which is why only processed Chuan Wu is used and why it is decocted first and long.

  As reference safety information, aconitine overdose classically presents with numbness and tingling of the mouth, tongue, and limbs; nausea, vomiting, and salivation; dizziness; and then cardiac arrhythmias (ventricular tachycardia/fibrillation) and hypotension — it can be fatal. These are documented reference facts, not a description of use; any suspected exposure is a medical emergency.

  Sources: PubMed 34315520 / PMC 8314510 (Chinese Medicine, 2021 — Aconitum toxicology & detoxification / processing chemistry); PubMed 35754486 / PMC 9213726 (Frontiers in Pharmacology, 2022 — aconitine cardiotoxicity meta-analysis). Reference safety information.

• This herb is considered extremely toxic.
  (while some Chinese herbs are toxic, it must be noted that many come prepared, or are combined, to mitigate their toxicity)

Herb-Drug Interactions

• Because of its narrow therapeutic window and cardioactive alkaloids, Chuan Wu warrants particular caution alongside other drugs that affect the heart. Additive risk is plausible with antiarrhythmics, cardiac glycosides, and other cardioactive agents, and alcohol is traditionally and pharmacologically avoided because it increases alkaloid absorption and toxicity. Well-controlled clinical interaction data are limited; management belongs with a qualified practitioner. (Flagged for practitioner confirmation — this is reference context, not an exhaustive interaction list.)

Western / Biomedical Research

Chinese Herb Clinical Studies & Research

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

• What does modern research say about Chuan Wu (aconite)?

  The research is preclinical and is dominated by aconitine’s cardiotoxicity. A meta-analysis of preclinical studies attributes aconitine-induced arrhythmia to voltage-gated sodium-channel activation with intracellular Na⁺/Ca²⁺ overload, plus cardiomyocyte apoptosis and mitochondrial dysfunction. Separately, aconitine-type alkaloids show analgesic and anti-inflammatory activity in laboratory models (inhibiting TNF-α and IL-6), but through ion-channel mechanisms that overlap the cardiotoxic ones — a narrow therapeutic window. Processing chemistry is well characterized: prolonged heating hydrolyzes the toxic diester alkaloids into far less toxic monoester forms. Human clinical evidence remains limited.

  Sources: PMC 9213726 (aconitine cardiotoxicity meta-analysis, 2022); PMC 10839071 (PubMed 38318112 — aconitine derivatives: analgesic/anti-inflammatory activity & narrow therapeutic window, 2024); PMC 8314510 (Aconitum processing/detoxification, 2021). Preclinical research context, not a therapeutic claim.

Chinese Herb Notes

• How does Chuan Wu compare with Cao Wu and Fu Zi?

  Chuan Wu, Cao Wu, and Fu Zi are all toxic aconites, but they do different work. Chuan Wu is the prepared main root of Aconitum carmichaelii; its focus is dispelling wind-damp and stopping severe cold bi pain in the channels, sinews, and joints. Fu Zi — the prepared lateral root of the same plant — is reserved instead for restoring devastated yang and warming the interior (yang collapse, interior cold), and is the more commonly used of the two.

  • vs Cao Wu — Cao Wu is the wild aconite (A. kusnezoffii), a different but related species; it shares Chuan Wu’s channels and indications but is regarded as stronger and more toxic, so it is dosed more cautiously.
  • vs Fu Zi — same plant as Chuan Wu, but the lateral root; Fu Zi restores collapsed yang and warms Kidney/Spleen fire, whereas Chuan Wu targets wind-damp cold pain.

  Classical combination: in Wu Tou Tang (Essentials of the Golden Cabinet), Chuan Wu is paired with Ma Huang, Bai Shao, Huang Qi, and Gan Cao (traditionally decocted with honey) for wind-cold-damp painful obstruction.

  Source: owner’s Five Branches notes (differentiation & pairs); classical formula literature.

This herb antagonizes or is antagonized by:

• Xi Jiao (Cornu Rhinoceri)

This herb is incompatible with:

• Bai Ji (Rhizoma Bletillae)
• Ban Xia (Rhizoma Pinelliae Tematae)
• Chuan Bei Mu (Bulbus Fritillariae Cirrhosae)
• Gua Lou (Fructus Trichosanthis Kirlowii)
• Gua Lou Pi (Pericarpium Trichosanthis Kirlowii)
• Gua Lou Ren (Semen Trichosanthis Kirlowii)
• Tian Hua Fen (Trichosanthis Kirlowii Radix)
• Zhe Bei Mu (Fritillariae Thunbergii Bulbus)
• Bai Lian (Radix Ampelopsis)

This herb is considered toxic