Stinging Nettle

Pictured: Stinging Nettle

Poisonous to: Cats, Dogs

Common signs to watch for:

  • Erythema (redness)
  • Swelling
  • Intense itching
  • Drooling
  • Pawing at the mouth
  • Vomiting
  • Labored breathing
  • Muscle fasciculations (twitching)
  • Incoordination (ataxia)

The leaves and stems of this plant are covered in fine, tiny hairs. Some of these hairs, called trisomes, have the ability to break their tips when handled. These tips or needles inject histamine into tissue when animals (or humans) rub up against the plant. This causes erythema (redness), swelling, and intense itching. When ingested, stinging nettle can result in profuse salivation, pawing at the mouth, vomiting, labored breathing, muscle fasciculations (twitching) and ataxia.

Poison type: plants

Alternate names: Urtica