Dog Benadryl dose

The standard benadryl (diphenhydramine) dose for a dog is 1 milligram (1mg) per pound every 8-12 hours. For example a 25 pound dog could get 25mg of benadryl two to three times per day. This can cause drowsiness. if your dog is too sleepy after dosing you can give 1/2 a dose. I am not a veterinarian and I recommend that you never give any medication (even over the counter medication like benadryl) without first consulting a veterinarian.