Cats are even more sensitive to ibuprofen than dogs. A single 200mg tablet can be fatal to a medium-sized cat. Cats have very limited glucuronidation capacity, making them unable to metabolize NSAIDs safely. This is always a medical emergency.
Why Is This Toxic to Cats?
Cats lack sufficient glucuronyl transferase enzyme to process ibuprofen through the normal metabolic pathway. This causes the drug to accumulate to lethal levels much faster than in dogs or humans.
Ibuprofen inhibits COX enzymes needed to protect the GI lining and maintain kidney blood flow in cats. Even tiny doses cause GI ulcers, kidney failure, and CNS toxicity including seizures.
| Dose | Effect in Cats | Timeline | Action |
|---|---|---|---|
| Any amount | GI irritation, vomiting | 0–4h | Emergency |
| 50mg or more (medium cat) | GI ulcers, kidney stress | 0–12h | Emergency NOW |
| 100mg+ | Acute kidney failure risk | 0–24h | Life-threatening |
| 200mg+ | CNS toxicity, seizures, death | 0–12h | Critical emergency |
Symptoms & Timeline
GI Irritation
Vomiting, drooling, nausea. BEST treatment window.
Ulceration
GI bleeding signs: bloody vomit or black stools.
Kidney Failure
Decreased urination, severe weakness.
Crisis
Without treatment: multi-organ failure. Fatal.
🚨 What To Do Right Now
Cats cannot metabolize ibuprofen. Any ingestion is a life-threatening emergency.
Frequently Asked Questions
Even a standard 200mg tablet can be fatal to a 10 lb cat. Cats are extremely sensitive. Any exposure is an emergency.
Absolutely never. There is no safe dose of ibuprofen for cats. Ask your vet about veterinary pain medications specifically formulated for cats.
Call Poison Control immediately. Even small amounts absorbed through licking can be toxic.
Inducing vomiting (if within 2 hours), activated charcoal, IV fluids for kidney protection, GI protectants. Always requires emergency vet care.
Yes — veterinary-formulated medications like Buprenorphine and Meloxicam (at vet-specific doses) are safer. Never use human painkillers.