Cats and Essential Oils – Are They Safe?


Essential oils are concentrated oils obtained by plants by distillation or cold pressing and in most cases the aromas of plants. They are volatile becoming liquid at room temperature but quickly evaporate when heated.  They are popular in homes both as a food flavouring, fragrance, insect repellents and for their therapeutic effects. But are they safe for cats?

Surprisingly, there is not a great deal of research either for or against. Tea tree poisoning has occurred when administered inappropriately high doses, but there is only scant (and conflicting) information on this topic, to the point where I considered discarding this article idea. But…due to the popularity of essential oils in the home doesn’t mean that it’s not an important topic to discuss.

Metabolising essential oils

First things first, cats are not small dogs or people. Their metabolism is different, drugs and other chemicals which are perfectly safe for humans and dogs can be toxic to cats.  The liver is responsible for metabolising essential oils. Cats lack glucuronosyltransferese (UGT) which are enzymes necessary for the metabolisation of many substances. Due to their altered metabolism, the half-life of essential oils is greater in cats, that is,  the period of time required for the concentration or amount of compound in the body to be reduced by one-half. This means that toxic levels can quickly build up in the liver and body.

Most of us are aware that many plants are toxic to cats, and it stands to reason that essential oils are too. It is very dangerous to assume that because something is natural, it is safe. So many people are looking for information on essential oils (or other natural therapies) to combat parasites because they are worried about using synthetic treatments. We must bear in mind that there are many plants and substances which are natural but also deadly (certain mushrooms, lilies, anthrax to name a few).

How does exposure occur?

There are three potential routes for essential oils to enter the body. Nose, skin and mouth.

  • Nose: Inhalation of essential oils used in an oil burner or reed diffuser, or applied to the cat.
  • Skin (dermal absorption): When an essential oil is applied to the cat’s fur or skin. The skin serves to protect the cat’s body from the outside world, but anything put on the skin is absorbed into the body (which is how nicotine patches work) and can be ingested when the cat grooms. A common mistake is to apply essential oils which are either toxic or undiluted.
  • Ingestion: When a pet owner administers an essential oil, a cat licks essential oil in a burner, or ingestion during grooming.

Toxic properties

  • Hydrocarbons which are made up almost exclusively of terpenes (monoterpenes, sesquiterpenes, and diterpenes).
  • Oxygenated compounds which are mainly esters, aldehydes, ketones, alcohols, phenols, and oxides.

Essential oils to avoid


The dose makes the poison, and this definitely applies to essential oils, care must always be taken regardless of what type you use. Some essential oils are safe to use in the home, but never apply neat essential oils onto your cat and be careful with products which contain essential oils. If in any doubt, speak to your veterinarian first. 

There are a number of essential oils which cat owners are advised to avoid, these include:

Symptoms of essential oil poisoning:

  • Drooling
  • Watery eyes
  • Tremors
  • Respiratory distress (coughing, difficulty breathing, sneezing)
  • Wobbly gait
  • Twitching
  • Seizures
  • Skin irritation
  • Decreased heart rate
  • Jaundice (yellow gums) due to liver failure
  • Pawing the face (if ingested orally)

Toxicity can occur from a single use (especially when a concentrated essential oil is used), or it can develop slowly, over a period of months and weeks.

Can I use essential oils around my cat?

Yes, but with caution. Do not use essential oils listed as toxic to cats, stick to safer types. Remember too that a cat’s sense of smell is approximately 14 times better than ours, so what smells nice to us can be overpowering to a cat (or dog). Only use oils in a well-ventilated area.

  • Never administer essential oils (diluted or neat) to the fur or skin of a cat
  • Never administer essential oils (diluted or neat) orally
  • Always dilute before applying to the skin (on humans, avoid directly applying essential oils to pets unless your veterinarian recommends you do so)
  • Wash your hands before petting a cat after you have been in contact with essential oils
  • Avoid the use of essential oils on products or surfaces your cat may come into contact with or lick
  • Diffuse essential oils in water when using an oil burner and only place in a well-ventilated room which you cat can leave
  • Place oil burners in areas your cat can’t access to prevent spilling essential oils onto the fur or accidental burns from the candle, never leave candles unattended around cats
  • Do not use essential oils to treat medical conditions in cats
  • Use essential oils in moderation
  • Only use therapeutic grade essential oils
  • Do not use around kittens, pregnant, lactating cats or cats with underlying medical conditions, especially liver disease
  • Watch your cat’s behaviour and if you notice any changes discontinue use
  • See a veterinarian if medical symptoms develop

Cat-safe essential oils:

I am somewhat hesitant to use the term cat-safe because all essential oils come with risks, but when used safely, and diluted, these oils are less likely to cause problems around cats.

  • Basil
  • Catnip
  • Clary sage
  • Geranium
  • Chamomile
  • Rosemary
  • Sage
  • Valerian



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