I think that online support communities for ADD / ADHD are great. Sites like ADD Forums and Women with ADHD really help people connect with each other and learn more about Attention Deficit Disorder. However, online Attention Deficit Disorder support communities are not a one stop place for everything related to ADHD.
People who are taking medication for ADHD need to communicate with their doctors about side effects! If you are having chest pains or trouble breathing you should not be over at ADD Forums writing a detailed post about it. You should be contacting your doctor, calling 911, or on your way to the Emergency Room.
No, I am not kidding! I have seen people do this!