You've heard of the disorder ADHD, commonly diagnosed among children, but you're no child. So why are you having such a hard time concentrating in class? The increase in the number of prescriptions doctors write for treating ADHD is staggering. According to the Congressional Testimony of a deputy director of the DEA, the number of prescriptions written for ADHD medication has increased by 500% since 1991! ADHD is a cognitive disorder characterized by impulsiveness, inattention, and hyperactivity, although hyperactivity is a less common symptom among older sufferers. Adults with ADHD have chemical imbalances in certain areas of their brains, which can make it more difficult to follow directions or to complete work within a specified time period. They may also experience difficulty concentrating or remembering mundane information. Because these symptoms of ADHD often become more detrimental later in life, as responsibilities grow, it's not surprising that people with adult ADHD can become anxious, angry, or depressed. ADHD can also affect a sufferer's social life.They are also more likely to turn alcohol or drugs as a feel-good outlet, or as a form of self-medication. For adults to be diagnosed with ADHD, their doctor needs to verify that they displayed symptoms of the disease during childhood. This is because all cases of ADHD begin at an early age, even though they are not always properly identified. If ADHD is diagnosed, the symptoms can usually be controlled with prescription medication. Adults with ADHD may also learn to manage their behavioral symptoms with therapy, relaxation training, or support groups.