TL;DR: Ibuprofen is highly toxic to cats and requires immediate emergency veterinary intervention to prevent fatal organ failure. If your cat ingests any amount, contact an emergency vet or pet poison control center immediately before symptoms appear.
What is ibuprofen and why is it dangerous for my cat?
Ibuprofen is a common human non-steroidal anti-inflammatory drug (NSAID) used to treat pain and fever. While safe for humans, it is extremely toxic to cats. Felines lack the specific liver enzymes needed to process this medication, leading to a rapid buildup of toxins in their system. This can lead to severe organ damage in a very short amount of time.
Is it a life-threatening emergency if my cat ate ibuprofen?
- Urgency Level: High. Ibuprofen ingestion is a critical veterinary emergency.
- A single 200mg tablet is enough to cause fatal kidney failure, gastric ulcers, or intestinal perforation in an average-sized cat.
- Do not wait for symptoms to appear; by the time a cat looks sick, irreversible damage may have already occurred.
- Contact your nearest emergency vet or a pet poison control center immediately.
How does a photo of the medication help the vet triage my cat?
- If you can safely do so, take a quick photo of the medication packaging or any remaining tablets.
- Showing this to the veterinary team helps them identify the exact milligram dosage and the specific formulation, such as rapid-release or liquid-gel.
- Accurate identification allows the team to calculate the toxicity level and begin the most effective life-saving treatment instantly.
Clinical Context (Merck Veterinary Manual)
Cats are highly susceptible to ibuprofen toxicosis, at approximately half the dosage required to cause toxicosis in dogs, due to their limited glucuronyl-conjugating capacity. Typical toxic effects involve the CNS, GI tract, and renal systems. Immediate action should include early decontamination by inducing vomiting if the ingestion was recent, followed by administration of activated charcoal with a cathartic, which can be repeated every 6-8 hours to prevent NSAID reabsorption. Treatment should focus on protecting the GI tract and kidneys, along with providing supportive care. H1-receptor antagonists (ranitidine, famotidine, cimetidine) may be useful in treating GI ulcers if they develop.
Chapter: Toxicology
Source: The Merck Veterinary Manual, 11th Edition (Page 3028)