difficult child is on Risperdal and I have the feeling it is losing its effectiveness. He is very impulsive. He is also on Lamictal and Trileptal. psychiatrist had us try Trazodone, but it didn't do anything but maybe hype him up abit. She wants to try Strattera which scares me or Topomax, but is open to suggestions. So I would like to know what prns your kids are on . He needs something to calm him when he gets really angry. Last nite he left a wonderful bite mark on my wrist. Thanks.