Can cats eat oleander?

Q: Can cats eat oleander?

Small amounts of leaf carry a potentially fatal heart toxin. Oleander's potent cardiac glycoside (oleandrin) causes serious arrhythmias in small amounts; dried leaves and vase water are also dangerous.

If your cat ate it

Signs: Vomiting, diarrhea, drooling, irregular heartbeat, tremors, collapse
When: Within hours
What to do now: Go to a vet now.

Don't.

Why

Oleander's potent cardiac glycoside (oleandrin) causes serious arrhythmias in small amounts; dried leaves and vase water are also dangerous.

If your cat has a condition

Dangerous for every cat, with or without a health condition.

SourcesReviewed 2026-10-24

ASPCA — Toxic and Non-Toxic Plants for Cats

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