At normal doses, the most common side effects of Benadryl exhibited by dogs include drowsiness and being unsteady on their feet. But if a dog receives too much Benadryl, they might exhibit: More pronounced sedation or agitation.
Antihistamine Dosing Chart For Dogs. Benadryl for Dogs - Per PetMD.com: The standard dosage for oral Benadryl is 1 mg per pound of body weight, given 2 |

Related: How Much Benadryl Can You Give a Dog Before Grooming? Doses and Warnings. Sedation and Motion Sickness Before a Car Ride. The standard dose is about the same, 12 mg per pound of body weight, but a slightly higher dose of 3 mg per pound may be helpful with some dogs.

Benadryl Pediatric Dosage Guide. Use these dosage charts for infants and children under 12 years old
Benadryl Dosage For Dogs Chart.Benadryl Dosage for Dogs: The right dosage of this medication is usually determined in two different ways as indicated below: It is administered by giving 1 milligram for every pound of a dogs weight after every 8 hours or three times per day.