KatieG- where can I find out more about this syndrome? Is the Doctor accessable? Just to update...I had a terrible experience with dizziness and just plain feeling ill since Feb04. All tests done, all normal. I said to my PCP are you sure it's not my medication (Welchol)? The doc says no and all the specialists said no, but guess what? I went back to my old medication Colestid (still hadn't expired yet) and within 4 days the dizziness and lightheadedness went away. Keep this in mind....I think people can develop a sensitivity to certain medications over time.