Medications known as stimulants have long been employed in the treatment of Attention Deficit Hyperactivity Disorder. These medications improve a chemical imbalance in the brain which is causing the symptoms. A number of neuro-imaging studies have shown that the brain functioning of ADHD patients does improve and appears to be more like the normal group after they have taken their prescribed medication. The Drug Digest provides an excellent synopsis on the use of stimulants with children and adults. For updates on new medications and warning about medications the FDA website is your best source of information.