After many studies it has been found that ADHD runs in families and in most cases, parents' genes are a major factor in the development of the condition. Research shows that children whose siblings or parents have the disorder are more likely to develop it themselves.
ADHD is not always about affecting children. Some adults also suffer from this disorder. Studies show that about 4% of adults in the US also have ADHD. It is most likely that they developed in childhood and may not be diagnosed until later in life.
ADHD disorder is a disorder that affects a person's self-control and attention control abilities. The best drug used to treat this disorder in both children and adults is Modalert 200mg, which you can buy online from Pharma Health Online.