Hi Teiji,

According to the National Institute of Mental Health, Bipolar Disease, also known as manic-depressive illness, "is a brain disorder that causes unusual shifts in a person's mood, energy, and ability to function. Different from the normal ups and downs that everyone goes through, the symptoms of bipolar disorder are severe. They can result in damaged relationships, poor job or school performance, and even suicide."

There are symptoms common to both bipolar and ADHD and it can sometimes be confusing. For example, many with ADHD are hyperactive, which can seem somewhat like the mania that those with bipolar may experience. But there are distinct differences between the two.

Health Central has its own site on bipolar disease where you can find loads of information. Check it out here.

Hope this helps!

Terry