Can I give Paracetamol (Acetaminophen) to my dog?

The short answer: **No, do not give paracetamol to dogs** without veterinary prescription and dosing

Paracetamol (acetaminophen) is toxic to dogs at doses commonly used in humans. While veterinarians can prescribe paracetamol for specific indications at carefully calculated doses (typically 10–15 mg/kg every 8–12 hours under supervision), self-administration of human paracetamol tablets to a dog risks serious liver damage, methemoglobinemia, and death. Cats are even more sensitive — for them paracetamol is nearly always fatal.

Why paracetamol is dangerous for dogs

Dogs metabolize paracetamol primarily by hepatic conjugation, and at toxic doses the minor CYP2E1 pathway produces NAPQI, the same toxic metabolite responsible for human acetaminophen liver injury. Dogs have lower glutathione reserves per kg than humans, so the toxic threshold is lower than their body weight would suggest. Additionally, dogs can develop methemoglobinemia (blood unable to carry oxygen), with cyanosis, difficulty breathing, and chocolate-brown gums.

Toxic doses in dogs

• >100 mg/kg: hepatotoxicity likely
• >200 mg/kg: severe liver injury, methemoglobinemia
• >600 mg/kg: fatal without aggressive treatment
• A single 500 mg human tablet is already 50 mg/kg for a 10 kg dog — approaching the toxic range

What to use instead

Safer, veterinary-approved analgesics for dogs include:

• Carprofen (Rimadyl) — dog-specific NSAID
• Meloxicam (Metacam) — NSAID for dogs
• Firocoxib — COX-2 selective NSAID
• Gabapentin for chronic or neuropathic pain
• Tramadol (efficacy debated; often combined with NSAID)
• Paracetamol can be prescribed by veterinarians at 10–15 mg/kg q8–12h, but only under veterinary supervision

Never give ibuprofen, naproxen, or aspirin to dogs from your own medicine cabinet — all are NSAIDs with narrow safety margins in dogs.

If a dog ingests paracetamol

• Call a veterinarian or Pet Poison Helpline immediately (US: 855-764-7661; UK: 01202 509000)
• Do not induce vomiting without professional guidance
• Bring the packaging (pill count, dose) to the visit
• Treatment typically involves activated charcoal, IV fluids, N-acetylcysteine (NAC), and monitoring of liver enzymes + methemoglobin

Clinical sources

• ACVIM Consensus Statement on NSAID use in dogs.
• Aronson LR. "Small animal toxicology: acetaminophen." VCOT 2010.
• Plumb's Veterinary Drug Handbook — acetaminophen entry.
• ASPCA Animal Poison Control Center — acetaminophen toxicity.
• FDA Animal Drug Adverse Event Reporting.

Bottom line

Do not give paracetamol to your dog from your own supply. If your dog is in pain, consult a veterinarian — there are safer dog-specific options. If ingestion has occurred, treat it as an emergency and call animal poison control.

Veterinary medicine is a specialty; never extrapolate human drug doses to pets without professional guidance.