Ranunculaceae
Aconitum carmichaelii
Fu zi · Chinese aconite · Carmichael monkshood
- Part used
- root
- Native range
- China, Taiwan and Vietnam
- Morphology
- Perennial to about a metre and a half with deeply divided leaves and hooded blue-violet flowers, the upper sepal forming the helmet that gives monkshood its name.
- Also known as
- Aconitum carmichaeli
What is in it
Evidence
No controlled trial evidence supporting the traditional uses. The pharmacology of the alkaloids is well characterised as a toxin.
Safety
Among the most acutely toxic plants in medicinal use anywhere. Aconitine acts on voltage-gated sodium channels, producing paraesthesia around the mouth, vomiting, then cardiac arrhythmia and death, sometimes within hours. The margin between the traditionally processed dose and a fatal one is very narrow, and poisonings are reported regularly where processing was inadequate or a decoction was cut short. There is no specific antidote.
Interactions: Additive arrhythmia risk with any drug affecting cardiac conduction
Regulatory: Not a permitted listed-medicine ingredient in Australia. Restricted to qualified practitioners in several jurisdictions and banned outright in others.
How the traditions classify it
Three systems, rating the same plant. Where they disagree, none of them is correcting the others — they are separate frameworks that arrived at their categories independently.
Historical use
Used in Chinese medicine for around two millennia, and always with explicit processing requirements — soaking, boiling and treating with brine to hydrolyse the alkaloids. Aconitum species were used across Eurasia as arrow and spear poisons, which is the older application.
Recorded as history and attributed where possible. Long use establishes that a plant was widely used, not that it worked, and not that it was safe.
Worth knowing
Aconite is the strongest case for taking a tradition's own instructions seriously as safety information rather than as ritual.
Chinese practice does not simply use fu zi; it specifies processing, and it specifies that the root is boiled for a long period before the rest of the formula goes in. That is not symbolism. Prolonged heating in water hydrolyses the diester alkaloids into far less toxic forms. Practitioners who shorten the step, or buyers who purchase unprocessed root, remove the one thing standing between the patient and a cardiotoxin — and people die of it most years.
Nomenclature verified against GBIF backbone taxonomy.