Castor Bean

Ricinus communis

Dogs: Severe Cats: Severe

Veterinary Emergency

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

ASPCA Poison Control: (888) 426-4435 | Pet Poison Helpline: (855) 764-7661

Plant Information

Common Names

Castor Oil Plant, Ricinus, Palma Christi

Family

Euphorbiaceae

Toxicity Details

Toxic Parts

seeds (beans), leaves

Toxic Compound

Ricin (highly toxic protein)

Onset Time

12-48 hours (delayed onset)

Severity

severe

Symptoms to Watch For

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.

Do not wait for symptoms. Call your vet or poison control immediately.

About Castor Bean

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.

Safe Alternatives

These plants provide a similar look but are non-toxic to pets:

✓ Areca Palm ✓ Bamboo Palm ✓ Parlor Palm