Published dose range
The published veterinary reference range for cimetidine in dogs is 5-10 mg per kg of body weight, given every 8-12h.
Source: Merck Veterinary Manual →Older antacid; famotidine usually preferred (fewer drug interactions).
Skip it or ask a vet first if
many drug interactionskidney disease
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.