Most essential oils are not safe for cats, especially when diffused, applied to skin, or used in concentrated forms. Cats have limited ability to metabolize many aromatic compounds found in essential oils.
11
Oils covered
8
Toxic or caution
Cats only
Species-specific
Warning
Important: Cats have limited glucuronidation capacity, meaning they are less able to process some compounds found in many essential oils. If your cat has been exposed, contact your vet or ASPCA Animal Poison Control (888-426-4435) immediately.
Essential oils to avoid around cats
These oils should not be diffused, applied, or used in any form around cats.
Tea tree oil→
Peppermint oil→
Eucalyptus oil→
Lavender oil→
Citrus oil→
Cinnamon oil→
Clove oil→
Wintergreen oil→
Pine oil→
Ylang ylang oil→
Why are cats more sensitive to essential oils?
Bio
Limited liver capacity
Cats have limited glucuronidation capacity, making it harder to process phenols and terpenes found in most essential oils.
Air
Inhalation risk
Diffuser use in enclosed spaces can build up slowly. Cats absorb airborne droplets through their respiratory tract.
Care
Grooming exposure
Any oil on fur is likely ingested through grooming, turning topical exposure into an ingestion risk.
All essential oils - cats
Toxic - do not use
Lavender
TOXIC
Linalool and linalyl acetate are harmful to cats through ingestion and inhalation. Plant and concentrated oil both pose risk.
VomitingDroolingLethargy
ingestion • inhalation • skin
Full guide →
Tea tree oil
TOXIC
One of the most dangerous oils for cats. Even small topical amounts can cause tremors and rapid liver failure.
TremorsAtaxiaLiver failure
ingestion • skin
Full guide →
Peppermint oil
TOXIC
Phenols in peppermint oil cannot be metabolized by cats. Diffuser use in enclosed spaces is also risky.
VomitingRespiratory distressDrooling
ingestion • inhalation
Full guide →
Eucalyptus
TOXIC
Contains eucalyptol which cats process poorly. Ingestion causes salivation, vomiting, and CNS signs.
VomitingDroolingWeakness
ingestion • inhalation
Full guide →
Citrus oil
TOXIC
Limonene and linalool found in citrus oils are harmful to cats at any concentration.
VomitingTremorsDepression
ingestion • skin
Summary only soon
Cinnamon oil
TOXIC
Highly irritating. Can cause liver damage and chemical burns to mouth and skin.
Mouth irritationVomitingLiver damage
ingestion • skin
Summary only soon
Caution - use carefully
Clove oil
CAUTION
Eugenol in clove oil can be harmful to cats in higher doses. Lower-level exposure requires monitoring.
VomitingLethargy
ingestion
Summary only soon
Frankincense
CAUTION
Lower risk than many oils but not recommended in enclosed spaces around cats.
GI upsetDrooling
inhalation
Summary only soon
Cedarwood
CAUTION
Mild risk when diffused in ventilated areas. Direct application or ingestion should be avoided.
Skin irritationMild GI upset
skin • ingestion
Summary only soon
Chamomile
CAUTION
German chamomile is mildly harmful. Roman chamomile at very low dilution may be tolerated but vet guidance is needed.
Mild GI upset
ingestion • skin
Summary only soon
Lower risk
Catnip
LOWER RISK
Catnip plant is generally non-toxic and often enriching for cats. Concentrated catnip oil should still be used carefully.
ingestion
Summary only soon
Are essential oil diffusers safe for cats?
In general, essential oil diffusers are risky for cats, especially in small rooms, closed spaces, or when used for long periods. Cats can inhale airborne droplets, and oil residue may settle on their fur and be swallowed during grooming.
Kittens, senior cats, or cats with asthma or liver disease
Lower-risk conditions
Large, well-ventilated room
Cat can freely leave at any time
Passive reed diffuser (not ultrasonic)
Short, infrequent use
Avoid all phenol-containing oils entirely
What to do if your cat was exposed
1
Move your cat to fresh air
Remove the cat from the area immediately. Open windows and doors to ventilate the space.
2
Remove the oil source
Turn off the diffuser or remove any product that caused contact. Seal containers.
3
Do not bathe with harsh products
Do not use soap, shampoo, or scrub the cat's skin unless a vet explicitly tells you to. Bathing can increase stress and absorption.
4
Watch for symptoms
Monitor for drooling, vomiting, tremors, weakness, difficulty breathing, or unusual behavior. Note when exposure occurred.
5
Contact a vet or poison helpline
Call your vet or ASPCA Animal Poison Control if ingestion, significant skin contact, or any symptoms occurred. Do not wait.
Need immediate help?
ASPCA: (888) 426-4435 Pet Poison Helpline: (855) 764-7661
Safer alternatives to essential oils around cats
Ways to freshen your home or calm your cat without putting them at risk.
Window
Open windows
Natural ventilation
Catnip
Catnip plant
Safe and enriching
Learn more →
Silvervine
Silvervine
Cat-safe alternative
Learn more →
Cleaner
Unscented cleaners
Avoid fragrance entirely
Learn more →
HEPA
HEPA air purifier
Cleans air safely
Vet
Ask your vet
Before any calming spray
Frequently asked questions
Generally no. Even passive diffuser use can expose cats to airborne compounds they cannot process well. Ultrasonic diffusers that release micro-particles are more hazardous. If you diffuse oils, use a large ventilated room, choose low-risk oils only, and always let your cat leave freely.
The most commonly harmful oils include tea tree, peppermint, eucalyptus, lavender, citrus, cinnamon, clove, wintergreen, pine, and ylang ylang. This list is not exhaustive. When in doubt, avoid any essential oil around cats.
No. Dilution reduces but does not eliminate the risk. Cats have limited capacity to metabolize key compounds in lavender regardless of concentration. Even diluted lavender oil should not be applied to cats or diffused in their living space.
Yes, and cats typically dislike the strong scent. More importantly, peppermint oil is harmful to cats even through inhalation. The phenol compounds cannot be adequately processed by a cat's liver.
Contact your vet or ASPCA Animal Poison Control (888-426-4435) immediately. Do not induce vomiting unless specifically directed by a vet. Try to identify the exact product and amount. Early treatment significantly improves outcomes.
This is lower risk but not risk-free. Oil residue can transfer to clothing, surfaces, and the cat's fur when they later enter the room. Ensure good ventilation and wash hands before handling your cat.
Hydrosols are generally considered lower risk than concentrated essential oils, but they are not automatically safe. Some hydrosols still contain enough aromatic compounds to cause concern. Always consult your vet before using any aromatic product around cats.
The catnip plant is generally considered non-toxic and enriching for cats. However, concentrated catnip oil should be treated with caution. The plant form is the safer choice.
Cats have limited glucuronidation capacity compared to dogs and humans, meaning they are less able to process certain phenols, terpenes, and other aromatic compounds. These compounds can accumulate and cause liver and neurological damage.
Symptoms can appear within minutes for direct ingestion or concentrated skin contact. With diffuser exposure, signs may develop over hours. If you suspect exposure, do not wait for symptoms before calling a vet.
Medical disclaimer: This page provides general educational information only. Always consult a licensed veterinarian. In an emergency contact ASPCA Animal Poison Control (888-426-4435).