Methylphenidate
"My son has been on several different ADHD medications.  He had been on one for a couple years and it wasn't having the effect it should after so long, so they changed him to Daytrana.  He was so out of control on this medication.  It actually seemed to make his impulse issues and attention worse. We discontinued the patch after the 2nd week.  Hopefully it's positive for others, just definitely not the one for my son."