Is Imodium (Loperamide) Safe for Cats?
Why it’s a problem
Cats are particularly vulnerable to loperamide, which is an opioid that can push them into profound sedation, slow breathing, and coma. Even small doses have been linked to serious toxicosis in cats. There is no reason an owner would ever reach for it, since feline diarrhea has safer veterinary solutions.
How to keep your pet safe
Keep Imodium and all anti-diarrheals away from cats, and never treat feline diarrhea with human drugs. Ask a vet, since diarrhea in cats can dehydrate them fast.
Warning signs to watch for
Deep sedation, wobbliness, slow or labored breathing, pinpoint pupils, vomiting, constipation, stupor, and collapse.
When to call the vet
Contact a veterinarian or a pet poison hotline immediately after any known or suspected exposure. Loperamide poisoning can progress, so do not wait for worse signs.
Common questions
My cat ate one of my Imodium capsules — what now?
Call a vet or pet poison hotline immediately. Loperamide is an opioid that can dangerously sedate a cat and slow breathing, so this is not a watch-and-wait exposure.
My cat is barely moving after swallowing my anti-diarrheal pill — is it the drug?
That fits loperamide poisoning, which can progress to coma. Get your cat to a veterinarian right away and bring the packaging.
Can a tiny bit of Imodium help my cat’s diarrhea?
No. Cats are too sensitive to loperamide for home dosing of any size, and feline diarrhea needs a diagnosis. Call your vet instead.
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).