Published dose range
The published veterinary reference range for loperamide in dogs is 0.08-0.1 mg per kg of body weight, given every 8-12h, max 2 days.
Source: Veterinary Partner (VIN) →Published range by weight
| Weight | Loperamide (published range) |
|---|---|
| 5 lb dog | 0.2-0.2 mg |
| 10 lb dog | 0.4-0.5 mg |
| 20 lb dog | 0.7-0.9 mg |
| 30 lb dog | 1.1-1.4 mg |
| 40 lb dog | 1.5-1.8 mg |
| 50 lb dog | 1.8-2.3 mg |
| 60 lb dog | 2.2-2.7 mg |
| 80 lb dog | 2.9-3.6 mg |
| 100 lb dog | 3.6-4.5 mg |
Computed from the published 0.08-0.1 mg/kg reference range, every 8-12h, max 2 days. Product strengths rarely split evenly, so round DOWN to the nearest practical dose and confirm with your vet.
DANGER: MDR1-mutation breeds (Collies, Australian Shepherds, Shelties, related herding breeds) can suffer severe neurotoxicity. Do not use in herding breeds without a vet MDR1 test.
Skip it or ask a vet first if
MDR1 breedsdiarrhea with bloodsuspected toxin ingestioncats
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.