One of the many things I've read that people with ADD/ADHD may be prone to is depression. Boy, howdy. That's certainly been true in my case.
I'm hoping that it's mostly situational, as in people who don't know they have ADD/ADHD (as I once didn't) beat themselves up a lot for not being more of a "success", or get beat up a lot for not being on time, being a "space case", etc... I'm hoping that as more information about ADD/ADHD is disseminated, and more scientific research results in useful studies, that younger generations will have access to resources that I never had until recently.
Anyhow, has anybody else in the community dealt with depression?