Hyperkinetic disorder, also known as attention-deficit/hyperactivity disorder or ADHD, is a common mental disorder that affects both children and adults. It is characterized by symptoms such as impulsivity, inattention, and hyperactivity, which can often lead to difficulty in social, academic and work settings. In addition to ADHD, other synonyms for hyperkinetic disorder include attention deficit disorder (ADD), hyperactivity disorder, and hyperkinetic syndrome. These terms all refer to a condition that affects an individual's ability to concentrate, focus, and regulate their behaviors. While there is no cure for hyperkinetic disorder, it can be managed with a combination of medication, therapy, and lifestyle changes.