My son was diagnosed with Pervasive Developmental Disorder (PDD) autism a little over a year ago. The nerologist gave us some risperdone and some papers and sent us out the door. Just a month ago they started him on a blood pressure medicine to help him sleep. Well now he aggressing backwards. We tried to get him into the other neurologist but they don't take our insurance. There is only one devel. pediatrician and it takes a year and a half to get in. What I am having problems with is, is that they have never taken any blood work. So how do they know if anything is working? If I demand blood work what should I be looking for? He is getting very aggressive to where he is hurting himself and eloping again. He was doing great and then all of sudden everything went backwards. I am really frustrated right now because I feel like I can't help my son. He has so much he wants to get out and he can't because he is angry all the time. Any suggestion would be very much appreciated!!!!