Why would you do this? Have you not considered that if you are giving your child medication so frequently like this, that it could very well lead to them having a long-term health problem! Also like the person above mentioned it could cause dependency issues! Although benadryl is narcotic it can still be habit forming when taken for sleep! I have three kids: 7, 3, and. 18 mon., and while I greatly value my sleep, their health comes first, and I refuse to "drug" them just so I can be selfish and get a little bit more sleep! Healthy children's bodies are programed so that they get the right balance of sleep and awake time on their own without medicine. Messing with this can screw with that balance and inadvertently make them unhealthy!!!