Is Wormwood Oil Safe for Cats?
Why it’s a problem
Cats lack the glucuronidation pathway that would clear thujone and wormwood’s other terpene ketones, so the compounds persist and concentrate in the nervous system. Tremors and seizures can follow exposure by mouth, through fur grooming, or by absorption through skin. No home-prepared wormwood preparation is safe for a cat.
How to keep your pet safe
Never use wormwood oil on, near, or around cats — including herbal flea and parasite mixes that often contain it. Do not diffuse it anywhere in the home. Ask your vet for feline parasite control instead of folk remedies.
Warning signs to watch for
Drooling, vomiting, restlessness, muscle tremors, seizures, stumbling, dilated pupils, collapse in severe cases
When to call the vet
Call a veterinarian or pet poison hotline immediately, even if the cat seems fine so far. Do not wait for seizures and do not attempt home decontamination beyond what the hotline instructs.
Common questions
Why is wormwood oil worse for cats than dogs?
Both are at risk, but cats clear thujone even more slowly, so a smaller amount does more damage for longer.
My cat touched oil on my hands — now what?
Call a poison hotline right away with the details, and wipe the fur only if they tell you to. Skin absorption is a real route for this oil.
More essential oils hazards for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).