Vicoria,                                                                                                            I may not have the answer you are looking for, however I am a mother with a son who was taking phenobarbital for the first two years of his life. He is now 8, we suspect he has ADHD, He also has developmental delay. He is a good boy with big heart, but he does have his struggles. I can't say for sure phenobarbital is the cause,but it has made me wander. There is an artical I just found on 9/16/08 in The New York Times Health section called "Drug for Babies' Seizures Is Found Ineffective and Perhaps Harmful'. you may find it informative.                                              Sincerly,                                                                                                   concerned mother