Symptoms of ADHD may be underdiagnosed and undertreated in preschool children. Preschool children with ADHD often require vigilant monitoring and supervision to ensure their safety. Symptoms of impulsivity, hyperactivity and distractibility often limit the effectiveness of educational and behavioral interventions. Hence, it is important to treat the symptoms of ADHD in children at an early age. Early intervention in children with ADHD may have an impact in the course of illness by abating longer-term disability in vulnerable children.