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Jimson Weed

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Poisonous to: Cats, Dogs

Level of toxicity: Generally moderate

Common signs to watch for:

  • Dilated pupils
  • Light sensitivity
  • Restlessness
  • Anxiousness
  • Elevated heart rate
  • Dryness of the mouth
  • Constipation
  • Walking drunk
  • Respiratory failure

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Jimson weed (Datura stramonium), which is also known as devil’s trumpet, thorn apple, Indian apple, black datura, jimsonweed, tolguacha, and Jamestown weed, is poisonous to pets (especially to large animals like horses, cattle). All parts of this plant are poisonous, as they contain the toxin tropane alkaloids (which is similar to the drug atropine). Ingestion results in dilated pupils, light sensitivity, restlessness, anxiousness, dryness of the mouth, intestinal stasis (lack of normal flow of intestinal contents), constipation, increased heart rate and breathing, walking drunk, and respiratory failure.

Poison type: Plants

Alternate names: Datura stramonium, Devil's Trumpet, thorn apple, Indian apple, black datura, jimsonweed, tolguacha, Jamestown weed