Published dose range
The published veterinary reference range for famotidine in cats is 0.5-1 mg per kg of body weight, given every 12-24h.
Source: Merck Veterinary Manual →Commonly used short-term for GI upset; persistent vomiting needs a vet.
Skip it or ask a vet first if
kidney disease (dose adjustment, vet)
If you think you overdosed
Call the Pet Poison Helpline: 855-764-7661 or ASPCA Poison Control: 888-426-4435. Both are staffed 24/7 by veterinary toxicologists.