Published dose range
The published veterinary reference range for famotidine in dogs is 0.5-1 mg per kg of body weight, given every 12-24h.
Source: Merck Veterinary Manual →Published range by weight
| Weight | Famotidine (published range) |
|---|---|
| 5 lb dog | 1.1-2.3 mg |
| 10 lb dog | 2.3-4.5 mg |
| 20 lb dog | 4.5-9.1 mg |
| 30 lb dog | 6.8-14 mg |
| 40 lb dog | 9.1-18 mg |
| 50 lb dog | 11-23 mg |
| 60 lb dog | 14-27 mg |
| 80 lb dog | 18-36 mg |
| 100 lb dog | 23-45 mg |
Computed from the published 0.5-1 mg/kg reference range, every 12-24h. Product strengths rarely split evenly, so round DOWN to the nearest practical dose and confirm with your vet.
Give before meals. Plain famotidine only, not Pepcid Complete.
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.