Is Tea Tree Toxic to Cats?
Also known as: Melaleuca, Australian Tea Tree, Narrow-leaved Paperbark, Melaleuca alternifolia · Melaleuca alternifolia
What makes it toxic
Terpenes (terpinen-4-ol and related compounds), concentrated in the essential oil. They are absorbed through skin and gut and depress the nervous system and liver function.
Warning signs to watch for
Wobbliness, drooling, weakness, vomiting, tremors and depression, sometimes within a few hours. Skin exposure to the oil can cause the same signs plus redness.
What to do if your cat eats it
For plant chewing, remove material and call your vet the same day. For any tea tree oil exposure — do not wash off with more products — call a vet or poison line immediately; tremors or collapse mean go to an ER now.
Common questions
Is tea tree oil safe to use on my cat for fleas?
No. Never apply tea tree oil to a cat, even diluted. Documented cases of weakness, tremors and death have occurred at fairly low concentrations, and cats groom treated skin and swallow the oil.
Is chewing the actual plant as dangerous as the oil?
The leaves are far less concentrated than the oil, so chewing usually causes drooling and stomach upset rather than collapse — but cats are unusually sensitive, so call your vet after any ingestion.
Are diffusers with tea tree oil a risk?
Yes, in closed rooms. Oils that settle on fur get groomed off and swallowed. Keep the cat out of the room, ventilate well, and prefer pet-safe options.
More plants checked for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.