Can I give my cat human anti-diarrhea medicine?

No, not unless your vet tells you to. Several common human stomach and anti-diarrhea products contain ingredients that are unsafe for cats, and dosing is easy to get dangerously wrong. Cats are especially sensitive to many human medicines, which is why even seemingly mild remedies can cause harm. For a mild case, plain water, a bland portion and a little canned pumpkin are the safe home steps. If the diarrhea is bad enough that you’re reaching for medicine, that’s the moment to call the vet, who can recommend something safe and right-sized.

When to call a vet: Don’t give any human medication without veterinary direction. If diarrhea is severe or persistent, call your vet.