Attention deficit hyperactivity disorder (ADHD) is a childhood neurobehavioral disorder, characterized by hyperactivity, and/or deficits in inhibition and attention, which can persist into adulthood. ADHD is categorized into three subtypes: predominantly hyperactive-impulsive, predominantly inattentive, and combined hyperactive-impulsive and inattentive. While attention deficit disorder (ADD) was formerly changed to the ADHD—predominantly inattentive subtype, the term ADD is still used in the general public. Symptoms of ADHD include inattentiveness, impulsivity, forgetfulness, restlessness, and difficulty with organization. ADHD negatively affects children’s emotional control, self-esteem, school performance, and interpersonal relationships. Adults with ADHD often have difficulties with work (e.g., absenteeism, frequent job changes), interpersonal relationships, and substance abuse. Affecting boys two to three times more than girls, ADHD is prevalent worldwide in approximately 6.4 percent of children (ages 6–11), ...