Over a third of children with ADHD have a second psychiatric diagnosis, and one of the most common diagnoses to be found with ADHD is oppositional defiant disorder (ODD).  This diagnosis causes a lot of frustration for parents, teachers and the children themselves. The disorder is lumped together with ADHD, in part because they occur together so often, but there are several differences in these diagnoses, and I feel that sometimes parents have expectations about the management of this...