Monkshood Toxic?

Updated 2026-03-06| 4 min read| 1,263 found this helpful
Monkshood
1

All parts of the plant are toxic, especially roots and seeds, with pre-flowering above-ground parts having the highest toxin concentration.

2

Aconitine, the primary toxic compound, is one of the most potent known plant toxins, with content ranging 0.2-3% by weight in fresh plant material.

3

Ingestion leads to rapid symptom onset, with death typically occurring from respiratory paralysis or cardiac arrest if untreated.

FAQ

Is Monkshood toxic to Humans?

Oral ingestion causes immediate mouth burning, numbness, salivation, nausea, vomiting, diarrhea, colic, anxiety, ataxia, convulsions, low blood pressure, irregular heart rhythm, vision loss, hypothermia, breathing difficulty, and potentially fatal respiratory or cardiac failure. (Severe)

Is Monkshood toxic to Cats?

No species-specific data available; expected signs include gastrointestinal distress, neurological impairment, cardiac arrhythmia, and potentially fatal respiratory or cardiac failure consistent with general aconitine poisoning. (Severe)

Is Monkshood toxic to Dogs?

No species-specific data available; expected signs include gastrointestinal distress, neurological impairment, cardiac arrhythmia, and potentially fatal respiratory or cardiac failure consistent with general aconitine poisoning. (Severe)

Is Monkshood toxic to Horses?

No species-specific data available; horses are highly sensitive to aconitine, with expected signs including colic, ataxia, arrhythmia, seizures, and rapid fatal respiratory or cardiac failure. (Severe)

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Toxicity Details

Humans
Severe

Oral ingestion causes immediate mouth burning, numbness, salivation, nausea, vomiting, diarrhea, colic, anxiety, ataxia, convulsions, low blood pressure, irregular heart rhythm, vision loss, hypothermia, breathing difficulty, and potentially fatal respiratory or cardiac failure.

Cats
Severe

No species-specific data available; expected signs include gastrointestinal distress, neurological impairment, cardiac arrhythmia, and potentially fatal respiratory or cardiac failure consistent with general aconitine poisoning.

Dogs
Severe

No species-specific data available; expected signs include gastrointestinal distress, neurological impairment, cardiac arrhythmia, and potentially fatal respiratory or cardiac failure consistent with general aconitine poisoning.

Horses
Severe

No species-specific data available; horses are highly sensitive to aconitine, with expected signs including colic, ataxia, arrhythmia, seizures, and rapid fatal respiratory or cardiac failure.

Toxicity Snapshot

Toxic PartsEntire plant, especially roots and seeds, including flower distillate. Above-ground parts have highest toxin concentration before flowering; dried plant material has slightly reduced toxicity.
Exposure RouteIngestion (most common, often from accidental confusion with edible plants), skin absorption of fresh plant sap, mucous membrane exposure.
Toxic CompoundsAconitine; Mesaconitine; Hypaconitine; N-Desethylaconitine; Oxoaconitine; 14-Acetylneolin; Aconosine; Hokbusin A; Senbusin C; Magnoflorin

First Aid & Prevention

First 30 Minutes

  • • If ingested and the patient is fully conscious, induce vomiting immediately
  • • Administer activated charcoal to bind unabsorbed gastrointestinal toxins
  • • Keep the patient calm and immobile to slow toxin circulation
  • • Seek emergency medical or veterinary care without delay

Contact Vet Immediately

  • • Confirmed or suspected ingestion of any part of the plant
  • • Onset of symptoms after exposure including salivation, unsteady gait, or abnormal heart rate
  • • Skin exposure to plant sap followed by numbness, tingling, or breathing difficulty

Prevention

  • • Avoid planting monkshood in areas accessible to children, pets, or grazing livestock
  • • Never forage for wild edible roots or greens in habitats where monkshood is known to grow
  • • Wear impermeable gloves when handling monkshood plants to prevent skin absorption of toxins

Treatment & Prognosis

  • • Perform gastrointestinal decontamination including emesis, activated charcoal administration, or gastric lavage for recent large ingestions
  • • Provide supportive care to manage heart arrhythmias, control seizures, and support respiratory function
  • • Avoid use of Digitalis and Strophanthin, which are contraindicated for aconitine poisoning
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Professional Toxicology

Scientific NameAconitum napellus aggr.
AliasesAconite、Aconite Monkshood、Auld Wife's Huid、Bear's-Foot、Blue Rocket、Blue Monkshood、Frair's Cap、Helmet Flower、Monk's Blood、Monk's Hood、Turk's Cap、Venus' Chariot、Wolf's Bane、Wolfsbane
Toxicity Grade
HumansSevere
CatsSevere
DogsSevere
HorsesSevere
Target Organs
HeartCentral nervous systemGastrointestinal tractRespiratory systemEyes
Mechanism of Action

• Toxic diterpene alkaloids (primarily aconitine) disrupt sodium channel function in nerve and muscle cells

• Impaired electrical signaling leads to abnormal heart rhythm, neurological dysfunction, and respiratory muscle paralysis

• Toxin efficacy reduces slowly during long-term storage of dried plant material

Other Species Risk (CliniTox)

Information from CliniTox veterinary text.

Horses, donkeys, goats: More sensitive to aconitine poisoning than sheep, with smaller ingested doses causing fatal effects
Sheep: Relatively more resistant to poisoning compared to equines and goats, but still at risk of fatal outcomes with sufficient ingestion
Cattle: Susceptible to severe poisoning, with clinical signs matching those reported in horses and humans including cardiac and respiratory failure
Confusion Risk

The following plants look similar and may be confused:

Other Aconitum species Aconitum spp.
Closely related species have nearly identical morphology and equally high toxicity levels
Larkspur Delphinium sp.
Similar flower and foliage structure, also classified as extremely toxic
Wild celery Apium graveolens
Root tubers are easily confused with monkshood roots; wild celery has pinnate alternately arranged leaves, white flowers in small umbels, and is non-toxic
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Data Sources

This information is for reference only and does not constitute medical advice. If ingestion or poisoning is suspected, seek medical or veterinary attention immediately.

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