Adults With Attention Deficit Hyperactivity Disorder (ADHD) Adults Have many responsibilities and roles that require attention, organization focus, concentration, and calm. Undiagnosed ADHD can make it difficult for individuals to take on certain responsibilities. This can impact their life, and lead to low self-esteem and confidence issues. The NICE guidelines https://www.iampsychiatry.uk/adult-adhd-assessments-and-treatments/