Can cats eat acetaminophen (tylenol)?

Q: Can cats eat acetaminophen (tylenol)?

A single tablet can kill a cat — never give it. Cats lack the liver pathway (glucuronidation) to clear acetaminophen, so tiny doses stop red cells carrying oxygen (methemoglobinemia) and damage the liver. It's in many cold and flu remedies too.

If your cat ate it

Signs: Brown or blue gums, swollen face and paws, laboured breathing, drooling
When: Within 1–4 hours
What to do now: Go to a vet now — there is an antidote (N-acetylcysteine). Bring the packaging.

Don't.

Why

Cats lack the liver pathway (glucuronidation) to clear acetaminophen, so tiny doses stop red cells carrying oxygen (methemoglobinemia) and damage the liver. It's in many cold and flu remedies too.

If your cat has a condition

Dangerous for every cat, with or without a health condition.

SourcesReviewed 2026-10-24

Merck Veterinary Manual — Acetaminophen toxicosis in cats (methemoglobinemia)
ASPCA Animal Poison Control — People Foods to Avoid Feeding Your Pets

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