Plant toxicology for cats
Is Oleander toxic to cats?
Nerium oleander · Apocynaceae
Verdict: Is Oleander toxic to cats?
Yes — Oleander is toxic to cats. Oleander (Nerium oleander) can make a cat ill. Risk depends on the amount, plant part, body size and the individual animal.
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Contact a veterinarian immediately
Do not wait for symptoms and do not induce vomiting unless a veterinary professional tells you to. Take a plant sample or clear photo with you.
- 1Contact an emergency veterinarian or pet poison service immediately.
- 2Do not induce vomiting unless a veterinary professional instructs you to.
- 3Take a plant sample, label, or clear photo with you.
Possible signs after Oleander exposure include:
- Vomiting
- Abdominal pain
- Slow or irregular heartbeat
- High blood potassium
- Tremors
- Collapse
Typical onset: 1–4 hours
Cardiac glycosides (oleandrin, neriine) in every part, including dried leaves
Veterinary sources
Reviewed by Dr. Patti McCartney, Animal Naturopathic Doctor. This educational guide supports, but does not replace, diagnosis or treatment from a licensed veterinarian. Risk varies by dose, plant part, body size and health history.