My difficult child's psychiatrist suggested that I give him Benadryl since he is not in school to see if he is better. I bought him Children's Benadryl. Is that what I was supposed to buy? I know a few folks on the board have tried Benadryl. Also, I gave him 1 tsp at 9am and it seems to have had no effect at all. Since this morning he has had several angry outbursts--screaming and throwing things. And he has been hitting me and his baby sister. Is the Benadryl supposed to take effect right away? My husband thinks it would take a few doses, but I'm not sure. Thanks.