ADHD stands for Attention-Deficit/Hyperactivity Disorder and is one of the most common mental disorders affecting both adults and children. Approximately 8.4% of children and 2.5% of adults have ADHD, and it is more common among boys than girls. It is often first identified in school-aged children when it leads to problems with schoolwork or to disruptions in the classroom. Adults may have it and they don’t even know it. If you are older than 18 years of age, and find yourself constantly late, forgetful, disorganized, and overwhelmed by your responsibilities, then you may have ADHD. Children and adults who may have ADHD should speak with their doctor for further investigation, diagnosis, and treatment.