It is related to Benadryl, and the dose is about the same, 2–4 mg per kilogram of body weight. There is a liquid form available if you have a small dog. Benadryl has been used in some anxiety ...

Always consult your veterinarian before giving Benadryl to your dog. The correct dosage of diphenhydramine for dogs depends on their weight. A small dog will need much less than a big dog to ...