Safety verdict
Consulted references classify the plant as toxic or irritating for that pet type.
Pet ingestion lookup
My cat ate Castor Bean - what should I do?
Ricinus communis
Potentially toxic
Contact your veterinarian or an animal poison-control resource now, especially if any amount was chewed or swallowed.
Verified against ASPCA/provenance audit 2026-05-06 on May 6, 2026.
Signs to watch for
Abdominal pain, vomiting, diarrhea, excessive thirst, weakness, and potential tremors or seizures.
Escalation note
This plant is considered highly toxic. Ingestion of any part, especially seeds, is a medical emergency; contact your veterinarian or an animal poison control center immediately.
First aid at home
Get your cat to a veterinarian immediately — don't wait for symptoms. Take a sample or photo of the plant, and a count of seeds if possible. Do not induce vomiting at home unless ASPCA Poison Control or your vet specifically directs you to.
What to watch for
Early signs: oral irritation and burning of the mouth and throat, drooling, intense thirst, vomiting, and diarrhea. As ricin spreads, watch for loss of appetite, weakness, abdominal pain, trembling, loss of coordination, and bloody diarrhea. Severe cases progress to convulsions and kidney failure.
Time window
Per ASPCA, signs typically develop 12–48 hours after ingestion, though oral irritation and vomiting can begin within minutes to a few hours of chewing seeds. Without aggressive in-clinic treatment, severe cases can progress to kidney failure, convulsions, and coma over 1–3 days.
When to call the vet
Call immediately. Any suspected ingestion of castor bean — seeds, leaves, or processed mash — is a 'go now' situation, not a 'wait and see.' Phone ASPCA Poison Control at 888-426-4435 or Pet Poison Helpline at 855-764-7661 on the way to the clinic.
What this means for your cat
Castor bean is highly toxic to cats — ASPCA Poison Control flags any ingestion, especially seeds, as a medical emergency. The toxic principle is ricin, a protein-synthesis inhibitor; ASPCA warns that as little as one ounce of seeds can be lethal. Don't wait for symptoms to develop before calling.
Sources: ASPCA, NC State Extension, Pet Poison Helpline.
Poison-control resources
This page summarizes source-bound plant-safety information and is not veterinary advice.