doctor is putting 4 year old difficult child 2 on Respidal. Has anyone else had/have a child this young on this? How did it do? Side effect?? They said to expect weight gain but how much?? He is already a good size boy. Please give me some feedback I am really afraid to give him this. And if I do and it makes him put too much weight on and doctor stops the medication will he lose the weight or have any lasting effect from Risperdal? Thanks to you all for you help and suggestions!! You will never know how appreciated it is!!