Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder with impairments in the domains of activity, attention and impulse control. The impairment in activity often presents as excessive motor restlessness and non-goal-directed overactivity. Attention deficit refers to the inability to persist in age-appropriate tasks and tendencies towards distractibility and disorganisation. Impulsivity is primarily the tendency towards ‘doing before thinking’, poor self-regulation and immediate gratification.