PupkeeperToxicEmergency
Dog ate acetaminophen (paracetamol)? What to do
Acetaminophen (paracetamol) can damage a dog's liver and red blood cells. Large amounts can be deadly.
If your dog ate or touched this, call your vet or a pet poison line now
United States
Poison lines in other countries: United Kingdom, Australia, Canada, New Zealand
What to do now
- Call your vet or a pet poison line now.
- Keep the packaging and bring it with you.
- Call as soon as you know, even if your dog seems fine.
Don't
- Don't make your dog vomit unless a vet tells you to.
- Never give acetaminophen to your dog unless your vet tells you to.
Signs to watch for
- Stomach upset
- Not eating
- Weakness or low energy
- Fast heart rate or heavy panting
- Yellow gums, skin or eyes
- Pale or bluish gums
- Trouble breathing
- Squinting or eye discharge
When signs appear: Within hours for large amounts; liver damage can show over several days
Why
Dogs have a narrower safety margin for acetaminophen than people. Smaller amounts mainly damage the liver, and larger amounts also damage red blood cells.
Sources
- VCA Animal Hospitals: Acetaminophen Toxicity in Dogs
- Merck Veterinary Manual: Poisoning from Human Over-the-Counter Drugs
Guide reviewed 9 October 2026.
General information from the sources above, not a diagnosis. When in doubt, call your vet.