Published dose range
The published veterinary reference range for chlorpheniramine in dogs is 0.2-0.4 mg per kg of body weight, given every 8-12h.
Source: Merck Veterinary Manual →Sedation common.
Skip it or ask a vet first if
glaucomaurinary obstruction
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.