After three years on the ADHD drug Ritalin, kids are about an inch shorter and 4.4 pounds lighter than their peers, a major U.S. study shows. The symptoms of childhood ADHD -- attention deficit hyperactivity disorder -- usually get dramatically better soon after kids start taking stimulant drugs. But this benefit may come with a cost, says James Swanson, PhD, director of the Child Development Center at the University of California, Irvine. "Yes, there is a growth suppression effect with stimul Join discussion...