Toxicity level
MildModerateSevere
- Risky — especially herding breeds
- Within hours
- Affects: Nervous system & gut
Did you know? Anti-diarrheal meds can be dangerous, especially for collies/herding breeds (MDR1 gene) — vet only.
Verdict
Feed only in moderation
Safe amount
Vet guidance only; risky for collie-type breeds
Species
🐶 Dogs
Why this verdict for dogs
Loperamide (Imodium) is occasionally used for dogs under vet guidance, but herding breeds (collies and relatives) with the MDR1 gene can react badly. Always ask your vet first.
🍽️ Feeding it safely?
Frequently asked questions
Can dogs eat imodium (loperamide)?
In moderation. Loperamide (Imodium) is occasionally used for dogs under vet guidance, but herding breeds (collies and relatives) with the MDR1 gene can react badly. Always ask your vet first.
How much imodium (loperamide) can dogs have?
Recommended: Vet guidance only; risky for collie-type breeds. When in doubt, ask your vet.
Is imodium (loperamide) safe for cats too?
Verdicts can differ between species. See the cat answer for imodium (loperamide) →
More medications for dogs
By the CanMyPet Editorial Team · Reviewed against ASPCA Animal Poison Control, the American Kennel Club (AKC) and Pet Poison Helpline · Last updated June 22, 2026.
Sources
- ASPCA — People Foods to Avoid Feeding Your Pets
- American Kennel Club — Dog Nutrition
- Pet Poison Helpline — Poison List
CanMyPet provides general information reviewed against trusted sources (ASPCA, AKC, Pet Poison Helpline). It is not a substitute for professional veterinary advice. When in doubt, always contact your veterinarian.