No essential oil is proven safe for cats
Cats are especially sensitive to essential oils because their livers lack some of the enzymes (glucuronyl transferases) needed to break down compounds such as phenols and terpenes. Oils on the skin or fur, licked from surfaces or spread by a diffuser can all cause poisoning.
Essential oils toxic to cats
Pet Poison Helpline lists these oils as known causes of poisoning in cats:
| Essential oil | Main toxic compound | Toxic to dogs too? |
|---|---|---|
| Tea tree (melaleuca) | Terpinen-4-ol | Yes |
| Pennyroyal | Pulegone (liver toxin) | Yes |
| Wintergreen | Methyl salicylate (aspirin-like) | Yes |
| Sweet birch | Methyl salicylate (aspirin-like) | Yes |
| Pine | Phenols and terpenes | Yes |
| Cinnamon | Cinnamaldehyde | Yes |
| Eucalyptus | Eucalyptol (1,8-cineole) | Yes |
| Peppermint | Menthol | Use caution |
| Citrus (orange, lemon, grapefruit) | d-Limonene, linalool | Use caution |
| Ylang ylang | Benzyl acetate and others | Use caution |
| Clove | Eugenol (a phenol) | Use caution |
Lavender is not on the main toxic list, but the ASPCA lists the lavender plant as toxic to cats and its oil contains linalool, which cats process poorly. Avoid it too.
Symptoms of essential oil poisoning
- Drooling, vomiting and pawing at the mouth
- Wobbliness, weakness or muscle tremors
- Difficulty breathing, coughing or wheezing
- Low heart rate and low body temperature
- Redness or burns on the skin, lips or tongue
- Liver damage and, rarely, seizures
Signs can start within hours. Pet Poison Helpline notes they can take 3-7 days to fully resolve.
Are diffusers safe for cats?
Passive diffusers (reed diffusers, plug-ins) and active (ultrasonic) diffusers both release tiny droplets that settle on fur and are then licked off during grooming. For cats, most vets recommend not diffusing essential oils at all, especially in small rooms or homes with cats that have asthma. Always let your pet leave the room, and stop immediately if you see drooling, coughing or watery eyes.
What to do if your cat is exposed
- Move your cat to fresh air.
- If oil is on the skin or fur, wash it off with liquid dish soap and lukewarm water.
- Do not induce vomiting: oils can be inhaled into the lungs and cause pneumonia.
- Bring the bottle to your vet or read the label to poison control.
Safer ways to freshen your home
- Open windows and use an air purifier with a HEPA filter.
- Use pet-safe cleaners and wash pet bedding often.
- Choose pet-safe plants: see our plants safe for cats.
Essential oils and cats: FAQ
What essential oils are safe for cats?
None are proven safe for cats. The safest approach is to avoid using essential oils on cats and not to diffuse them where cats spend time.
Is lavender oil safe for cats?
No. Lavender contains linalool, which cats process poorly. Avoid applying it to cats or diffusing it near them.
Is peppermint oil safe for cats?
No. Peppermint oil is on the list of oils known to poison cats.
Is tea tree oil safe for cats?
No. Tea tree (melaleuca) oil is one of the most common causes of essential oil poisoning in pets, often from people applying it to the skin for fleas or itching.
Are pet-specific essential oil products safe?
Products made for pets are usually heavily diluted, but "natural" does not mean safe. Ask your vet before using them, especially on cats.