Diagnosing Adult ADHD Adult ADHD is more difficult to what age diagnose adhd (he has a good point) than ADHD in children. The majority of symptom checklists for children are not useful in adults. Typically, a thorough evaluation by a therapist or psychologist is required. Work or school records could be reviewed, too. Family members, friends, and coworkers members can also benefit from counseling. Symptoms ADHD can cause problems at school and at work. They are unable how to get a diagnosis for add keep on top of their work and meeting deadlines. They have lost things, forget appointments or medical instructions. They can also be impulsive and risk their health by skipping meals or avoiding medications they require. They are more likely to react to stress in an overly emotional way and have trouble in focusing or interpreting the moods and behavior of other people. People with ADHD can have difficulty staying focused and may get bored easily by monotonous tasks.