Household danger · 2 min read

Is Peppermint oil dangerous for cats?

No — dangerous

No. Peppermint oil is toxic to cats — it's in many diffuser blends and mint-flavoured cleaning products. Avoid.

If your cat has just eaten peppermint oil

  1. Move cat to fresh air.
  2. Wash any oil from fur with mild soap.
  3. Call your vet.

What's the full picture?

Peppermint essential oil is toxic to cats — the menthol and related terpenes cause liver injury, drooling, vomiting, and breathing difficulty. Undiluted oil is the worst risk, but diffuser exposure builds up over time.

UK households using peppermint oil for 'natural' pest deterrent, aromatherapy, or room freshening should not do so in rooms cats access. Cats can inhale vapour and absorb through grooming.

Exposure symptoms include drooling, vomiting, respiratory irritation, and with larger doses, liver damage. Wash contaminated fur immediately and go to the vet.

Symptoms to watch for

0–4 hours
Drooling, vomiting, weakness.
4–24 hours
Liver injury signs in significant exposures.

If you're worried right now

Call your vet or out-of-hours emergency vet first. For poison advice, the Animal PoisonLine (UK) is on 01202 509000 — 24/7, charges apply. Your vet can also call the Veterinary Poisons Information Service (VPIS) directly.

Essential oils no Eucalyptus oil no Lavender oil no Mint caution Tea tree oil no

About this guidance

Every entry on this site is compiled from published UK veterinary toxicology sources — International Cat Care, Veterinary Poisons Information Service (VPIS) references, RCVS-registered practice materials, and peer-reviewed feline medicine literature. Where the evidence is mixed, we err on the cautious side because cats are unusually sensitive to many common substances that are harmless to humans and even to dogs.

This is general information written for UK cat owners. It is not personalised veterinary advice for your specific cat, their age, weight, medical history, or the exact exposure you're dealing with. If your cat has eaten something or is unwell, call your vet first. The Animal PoisonLine on 01202 509000 is available 24/7 for a small fee and can tell you whether an emergency visit is needed.

Entries are reviewed and updated as new research emerges. Spotted an error? Let us know — corrections are investigated and applied within 24 hours. For more context on how we work, see about and our full disclaimer.

Last reviewed: · By the What Can My Cat Eat? editorial team

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