A few days ago I took my son off of Concerta, and since that day he has been completely out of control. I was expecting some withdrawal behavior but I wasn't expecting it to last so long considering the medication. is already out of his system. He was slightly better today with a few periods of calmness, but for the most part he has been like a crazed animal...it's almost scary! He has Sensory Integration Disorder (SID) and "ADHD" but we have been trying to help him get regulated for the past 3 days and we don't know what else to do. How long is this going to last? Is there a supplement or something homeopathic we can give him? We've got to think of something fast because school is coming up again on Monday. Does anyone else have any experience with this?