Toxic to cats · Medications

Is Naproxen toxic to cats?

Extreme severity No safe amount — No amount is considered safe.

Yes. Even a small amount can be life-threatening — treat any exposure as an emergency and contact a vet immediately.

Symptoms to watch for

  • vomiting
  • bloody vomitus
  • black-tarry stools
  • diarrhea
  • lack of appetite
  • painful abdomen
  • weakness
  • pale gums
  • lethargy
  • sepsis
  • depression
  • seizures
  • facial twitching
  • coma

How vets treat it

Call your veterinarian or Pet Poison Helpline immediately for life-saving treatment advice. Early intervention is critical for a better outcome.

Why it's dangerous

Naproxen has a narrow margin of safety in pets, leading to severe gastrointestinal ulceration, potential intestinal perforation, and acute kidney failure.

Toxic compound: Naproxen

Good to know

As little as one 220mg tablet can be fatal even to a large dog. Cats may specifically exhibit facial twitching.

Sources

This page is informational and is not veterinary advice. If your pet has been exposed to something risky, contact your vet or an animal poison control line right away.

More substances toxic to cats

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