Background
Attention-Deficit Hyperactivity Disorder (ADHD) is one of the most common chronic neurobehavioural disease encountered in child development. It is characterized by symptoms of developmentally inappropriate inattention, distractibility ,excessive motor activity and impulsivity ofen accompany with behavioural problems and cognitive deficits. It affects 3%-5% of the school-aged population worldwide. The disorder occurs more frequently in males than females, with male-to female ratios rangi...