Hi I have not been on this site for awhile. My son 4 1/2 was given the diagnosis of Pervasive Developmental Disorder (PDD)-not otherwise specified and was put on clodidine - did nothing. Changed to Rispodal- worked wonders until he put on weight (4 lbs in one month) He was on .25 ml dr increase it to .50 ml 2 x a day - his impulsiveness got worse and he sleeps 16 hr a day. Only time he is awake is in school. Dr suggested .50ml at night his behavior got worse and he became agressive AGAIN. Now dr wants him to take Abilify 2.5 mlsand cut out the rispodal cold turkey, no weaning. I can not find much info on the medications for children this young. Pharmacist(who is amazing help) suggested cutting the rispodal to .35ml in the am until I can get the rx (on backorder). I did have him on a high frutose free diet until 3 weeks ago, things were going so good I thought we found the answer. We are back on the diet. Any suggestions? Any info on this medication?