Can You Give A Dog Benadryl If They Have Heartworms?
Can You Give A Dog Benadryl If They Have Heartworms? Antihistamine Dosage: the usual dosage is 1 mg of Diphenhydramine (Benadryl) per pound of dog’s body weight. Give this 30-60 minutes before the first few monthly heartworm preventative tablets. After administering heartworm preventative, observe the dog for at least 8 hours to make sure they