Is Castor Bean Toxic to Cats?

Yes — Castor Bean is severely toxic to cats

Castor beans contain ricin — one of the most toxic naturally occurring substances. A single bean can kill a dog. The delayed onset (12-48 hours) means owners may not connect symptoms to ingestion. Any suspected exposure requires emergency care.

Symptoms in Cats

If your cat eats Castor Bean, watch for these symptoms (onset: 12-48 hours (delayed onset)):

Severe vomiting
Bloody diarrhea
Abdominal pain
Dehydration
Seizures
Death

What To Do

EMERGENCY. Immediate vet care. No antidote for ricin. Aggressive decontamination and supportive care. Often fatal once symptoms appear.

This is a veterinary emergency for cats. Call your vet or ASPCA Poison Control (888) 426-4435 immediately.

Cat-Safe Alternatives to Castor Bean

✓ Areca Palm ✓ Bamboo Palm ✓ Parlor Palm

Quick Facts

Scientific Name

Ricinus communis

Also Toxic to Dogs?

Yes (severe)

Toxic Compound

Ricin (highly toxic protein)

Toxic Parts

seeds (beans), leaves

Sources: ASPCA Animal Poison Control Center, Pet Poison Helpline. View full Castor Bean toxicity profile.