What are the symptoms of Tea tree oil poisoning in cats?

drooling, lethargy, wobbliness, tremors, low body temperature, collapse

Tea tree oil

Q: Is Tea tree oil toxic to cats?

Dangerous: Never — concentrated melaleuca oil can cause severe neurologic signs in cats. Tea tree (melaleuca) oil is a common “natural” spot-on that people apply to cats for fleas or skin issues. Cats lack efficient glucuronidation, so terpenes in the oil stay active longer. Even dermal exposure — a few drops on the coat that the cat then grooms — can cause drooling, weakness, tremors, and low body temperature. Diffusers and undiluted bottles are the other typical route. This is not a mild essential-oil irritation; concentrated products have killed cats. Source: ASPCA.

Q: Is Essential oils also safe for cats?

Toxic: Toxic — concentrated oils are a poor match for feline liver chemistry.

Dangerous

Verdict

Never — concentrated melaleuca oil can cause severe neurologic signs in cats.

Toxic principle: terpenes (melaleuca oil)

Also called: tea tree, melaleuca, melaleuca oil

Source: ASPCA · Verified 2026-08-13

If your cat ate this

Cats hide symptoms — don't wait and see. Even small amounts of certain substances can be fatal to a cat. Act fast.

1. Call your veterinarian immediately
US — National hotline: ASPCA Animal Poison Control Center (888) 426-4435 aspca.org(24/7, Consultation fee may apply.)
US — National hotline: Pet Poison Helpline (855) 764-7661 petpoisonhelpline.com(24/7, $89 per incident fee; also covers Canada.)
GB — National hotline: Animal PoisonLine 01202 509 000 animalpoisonline.co.uk(24/7, £35 per call (8am–8pm weekdays), £45 at other times.)
AU — National hotline: Animal Poisons Helpline 1300 869 738 animalpoisons.com.au(24/7)
NZ — National hotline: Animal Poisons Helpline 0800 869 738 poisons.co.nz(11am–7pm NZ time (currently being extended), Charges apply.)
CA — National hotline: Pet Poison Helpline (855) 764-7661 petpoisonhelpline.com(24/7, $89 per incident fee.)

Verified 2026-08-06

Verdict

Tea tree (melaleuca) oil is a common “natural” spot-on that people apply to cats for fleas or skin issues. Cats lack efficient glucuronidation, so terpenes in the oil stay active longer. Even dermal exposure — a few drops on the coat that the cat then grooms — can cause drooling, weakness, tremors, and low body temperature. Diffusers and undiluted bottles are the other typical route. This is not a mild essential-oil irritation; concentrated products have killed cats.

Quick comparison

Product	Typical risk
Undiluted tea tree / “natural flea” drops	Dangerous
Reed diffuser / liquid potpourri	Dangerous
Lightly scented candle across the room	Usually irritation only — still ventilate

Symptoms to watch for

• drooling
• lethargy
• wobbliness
• tremors
• low body temperature
• collapse

What to do

Wash the oil off the coat with mild dish soap if it is safe to handle the cat, prevent further grooming, and call a vet or poison control. Do not apply essential oils to cats.

ASPCA Animal Poison Control Center: (888) 426-4435 aspca.org