Can You Give Dogs Benadryl?

Can You Give Dogs Benadryl?

petMD reports that Benadryl is often prescribed to treat allergies in dogs. Walker Valley Veterinary Hospital says that dogs can be given 1 milligram of Benadryl per pound of the dog's weight twice a day to control allergy symptoms.

Benadryl is an antihistamine, says petMD. Benadryl is a brand name for a chemical called diphenhydramine. It acts to block the binding of histamine to H-1 receptors. During an allergic reaction, histamine is released and causes blood vessels to dilate and smooth muscles to contract. Benadryl blocks histamine from binding to the H-1 receptors and therefore relieves itching, swelling, inflammation and difficulty in breathing.