Attention Deficit Hyperactivity Disorder:
A Practical Guide

ADHD is the most common childhood neurodevelopmental disorder¹

The Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition (DSM-5^®) defines ADHD as “A persistent pattern of inattention and/or hyperactivity-impulsivity that interferes with functioning or development.”²

In order to meet the diagnostic criteria for ADHD, there must be clear evidence of interference with, or the reduced quality of, social, academic, or occupational functioning attributable to the symptoms²

• Several inattentive or hyperactive-impulsive symptoms present prior to age 12 years
• Several inattentive or hyperactive-impulsive symptoms present in two or more settings (e.g., at home, school, or work; with friends or relatives; in other activities)