I think the problem is more the risperdal
then the Concerta. Side effects listed for risperdal
include - Aggressive behavior, agitation, anxiety, stiffness or weakness of the arms or legs, tic-like or twitching movements, trembling and shaking of the fingers and hands, trouble sleeping, and twisting body movements.
The site said to, "Check with your doctor immediately if any of the following side effects occur while taking risperidone:" talking about those mentioned above.