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If your cat ate blue cohosh — do this now

  1. Take the plant away and clear any pieces from their mouth.
  2. Do not induce vomiting unless told to by a professional.
  3. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 now.

Blue Cohosh is toxic to cats (ASPCA).

Pet emergency

My cat ate Blue Cohosh — what to do

Step by step

  1. Take blue cohosh away and remove any plant material from your cat's mouth so they cannot eat more.
  2. Note roughly how much was eaten and when — this helps the vet judge the risk.
  3. Do NOT induce vomiting unless a vet or poison-control specialist tells you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice.
  5. Watch for drooling, pawing at the mouth, vomiting, loss of appetite, or lethargy, and bring a leaf or photo to the appointment.

This is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide as well as the plant. When in doubt, call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435.

My cat ate blue cohosh — FAQ

Is blue cohosh poisonous to cats?

Yes — the ASPCA lists Blue Cohosh (Caulophyllum thalictroides) as toxic to cats. All parts of Caulophyllum thalictroides are toxic, particularly the roots and seeds. The plant contains the alkaloid methylcytisine (a nicotinic agonist), the saponin caulosaponin, and glycosides. Ingestion causes nausea, vomiting, diarrhoea, elevated heart rate, and in high doses potentially more serious cardiac effects. The blue berry-like seeds are particularly hazardous to children. Contact with the plant can also cause contact dermatitis. Toxic to dogs and cats. Not individually listed by the ASPCA; classified as toxic by university Extension sources (NCSU, UVM) and veterinary plant-poison references. Wear gloves when handling roots, and prevent children and pets from accessing the fruit.

How serious is it if my cat ate blue cohosh?

Blue Cohosh is toxic to cats and reactions can be significant, so treat any ingestion as urgent. Call your vet or poison control on (888) 426-4435 straight away rather than waiting to see if symptoms develop.

What symptoms should I watch for?

Signs usually appear soon after chewing: drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy. All parts of Caulophyllum thalictroides are toxic, particularly the roots and seeds. The plant contains the alkaloid methylcytisine (a nicotinic agonist), the saponin caulosaponin, and glycosides. Ingestion causes nausea, vomiting, diarrhoea, elevated heart rate, and in high doses potentially more serious cardiac effects. The blue berry-like seeds are particularly hazardous to children. Contact with the plant can also cause contact dermatitis. Toxic to dogs and cats. Not individually listed by the ASPCA; classified as toxic by university Extension sources (NCSU, UVM) and veterinary plant-poison references. Wear gloves when handling roots, and prevent children and pets from accessing the fruit. Any worsening or persistent symptoms warrant an immediate vet visit.

Should I make my cat vomit?

No — do not induce vomiting unless a vet or the ASPCA Animal Poison Control Center specifically tells you to. The wrong action can make things worse. Call (888) 426-4435 and follow professional advice.

How do I stop this happening again?

Keep blue cohosh well out of reach, or swap it for an ASPCA non-toxic plant — see the best cats-safe plants list.

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