My 5 year old has only been on this for one day. As soon as I pi...

My 5 year old has only been on this for one day. As soon as I picked him up from school I could tell that he was not in a good mood. He was mad about everything! He threw 3 big tantrums last night that each lasted about 30-45 minutes. I am trying it again today to see how he does tonight. If it's anything like last night... I'm going to stop giving it to him and try something natural. He was hitting himself in the head over and over again and saying "I want to die".