Many parents question how much Tylenol to give their child to reduce pain or fever. While the recommended dose is based on each childs age and weight, accidental Tylenol overdose is still a potential danger. Dr. Turmelle from St. Louis Childrens Hospital discusses common symptoms and Veterinarians use Benadryl for dogs on a regular basis to treat allergies, travel anxiety, and motion sickness. While you should always consult with your veterinarian before giving your dog a human medication, here is what you need to know about using Benadryl for dogs.