Pictured: Larkspur

Poisonous to: Cats, Dogs

Level of toxicity: Generally mild to moderate

Common signs to watch for:

  • Drooling
  • Abnormal heart rhythms
  • Constipation
  • Abdominal pain
  • Paralysis
  • Tremors
  • Seizures
  • Heart and lung failure
  • Death

Larkspur or Delphinium is a beautiful flowering plant. All plants in the Ranunculaceae family contain diterpene alkaloids. These alkaloids have a neuromuscular blocking effect by inhibiting acetylcholine (neurotransmitter in nervous systems) causing weakness, drooling, abnormal heart rhythms, constipation, abdominal pain, paralysis, tremors and seizures when ingested. When large toxic ingestions, heart and lung failure can be seen, along with death.

Poison type: plants

Alternate names: Delphinium, Lark spur