Attention-deficit/hyperactivity disorder (ADHD) is a disorder characterized by the persistent display of inattention and/or hyperactivity-impulsivity which in one way or the other interferes with functioning or development of an individual and also cause discomfort to people around such person. Inattention and hyperactivity/impulsivity are the major symptoms of ADHD. Some Persons with ADHD might only have one of the symptoms, while others have both inattention and hyperactivity-impulsivity. Most children and adults have the combined type of ADHD. People with inattention symptoms have problems sustaining attention in tasks or play, including conversations, and in the classroom and their workplace. People with hyperactivity/impulsivity symptoms often feel restless, they are mostly unable to play quietly or do things without disturbing other.