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 →Published range by weight
| Weight | Cimetidine (published range) |
|---|---|
| 5 lb dog | 11-23 mg |
| 10 lb dog | 23-45 mg |
| 20 lb dog | 45-91 mg |
| 30 lb dog | 68-136 mg |
| 40 lb dog | 91-181 mg |
| 50 lb dog | 113-227 mg |
| 60 lb dog | 136-272 mg |
| 80 lb dog | 181-363 mg |
| 100 lb dog | 227-454 mg |
Computed from the published 5-10 mg/kg reference range, every 8-12h. Product strengths rarely split evenly, so round DOWN to the nearest practical dose and confirm with your vet.
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.