Drug Digest Online
Drug Digest is a highly nifty site for figuring out which drugs might be right for you. It also lists numerous conditions to help you pin point what may be wrong with you. I don’t advise that hypochondriacs go to this site, because like most sites, they’ll come up with a million things wrong with them. 
On the other hand, it has some of the latest information out there on drugs and conditions, which is nice. I found some more interesting information on my Fibromyalgia. I had never realized before that my depression, insomnia, and headaches were possible symptoms of it. Nor did I know that they believe one of the causes of it could be low serotonin levels. My massive depression of a few years back was caused by a significant drop in serotonin levels. I can’t help but wonder now if it was inter-related to the fibro. I just hadn’t made the connection before.
Anyway, the more you know, the better patient you are.