Symptoms of ADHD that may affect adults:

• Job performance. Their work performance may be inconsistent because they have difficulty organizing their work, managing their time, and concentrating on one task at a time. They may be forgetful and misplace or lose things. They may quit their jobs due to boredom.
• Personal relationships. Relationships may suffer for adults who have problems focusing their attention on conversations, "reading" the behavior and moods of others, and expressing their own feelings.
• Temper. Becoming easily frustrated is often related to having difficulty tolerating stress. These adults may overreact and have a short, quick temper.
• Problem-solving ability. Adults who have difficulty waiting for things they want may not be able to accurately foresee the consequences of their actions. As a result, they may engage in risky behaviors, such as unprotected sex, alcohol and drug use, or unwise financial ventures.

Effects of ADHD at Work and at Home
ADHD can make it hard for a person to complete tasks that he or she finds tedious, such as organizing taxes, cleaning their desk, responding to correspondence, and providing employers with detailed reports. ADHD can also cause problems in getting along with others or talking too much on the job. At home, close family members often complain that behaviors, such as being lively or spontaneous, that are attractive at first glance become wearing over time. Families may resent having to suffer the consequences of impulsive behaviors that they cannot control. This frustration with impulsivity is as difficult for parents as it is later for spouses.