This is the worst medication for children. My 7 year old son was on it for one month and his personality slowly changed to the point that I wondered who the @#@! he was! He got angry very easily over everything, he growled at people, he developed anxiety about going to school (he had to be literally pulled off of me), he was never happy, he had nightmares and the list goes on! I stayed awake at night wondering what happened to my sweet, loving, easy-going little guy. Fortunately I put 2 and 2 together in a relatively short time. He got none of the second bottle I got refilled. Within 2 days he was better. Within a week I have my son back. This medicine is horrible and should not be prescribed to children. I don't know what ingredient causes the behavioral changes but pediatricians should at least tell parents to look out for them.