If you’re a parent of a child with ADHD, you may have experienced difficulty in getting your child to sleep at a reasonable hour. As it turns out, this is a common issue amongst parents as up to 70 percent of children with ADHD have difficulty falling asleep, according to CHADD...“Individuals with ADHD may feel more alert in the evening than in other parts of their day,” Jeincy Duarte, PsyD, BCBA, a clinical psychologist of ADHD and behavior disorders at the Child Mind Institute, tells SheKnows.