Is Codeine Safe for Cats?
Why it’s a problem
Cats metabolize opioids differently and react strongly even to small amounts, with sedation, dysphoria, and slowed breathing reported after exposure. A human tablet or syrup dose is far beyond what a cat can tolerate. Combination products containing acetaminophen add a toxicity that is especially deadly for cats.
How to keep your pet safe
Store codeine products — including syrups and combination pills — out of all pets’ reach. Pain control for a cat must come from a veterinarian who knows feline drug sensitivities.
Warning signs to watch for
Profound drowsiness, wobbliness, drooling, vomiting, pinpoint pupils, slow or shallow breathing, low body temperature; severe cases: unresponsiveness, collapse.
When to call the vet
Call your veterinarian or a pet poison hotline immediately — cats can stop breathing with opioid overdoses. Tell the hotline about all ingredients in any combination product.
Common questions
My cat licked codeine syrup — is that dangerous?
Yes, it can be — cats are very sensitive to opioids, and some syrups also contain acetaminophen, which is extremely toxic to cats. Call your vet or a pet poison hotline immediately.
Why are opioids riskier for cats than dogs?
Cats process these drugs differently and show stronger sedation and dysphoria at small doses. Opioid use in cats should only ever happen under veterinary supervision.
More medications hazards for cats
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).