I have had dizzy spells - felt fine sleeping, but when I sat up in bed I was very dizzy. Several months passed between episodes. Doctor says it is vertigo and prescribed Meclizine. I recognize now that the trigger is doing activities that make me look up in an awkward position (installing tile under the upper kitchen cabinets, relocating some wiring near the ceiling of the basement). The Meclizine made the last episode a one-day ordeal instead of the 5 days of the previous episode. Since then, half of a 25 MG tablet prevented onset. So I think it s under control, but I was just advised by an acquaintance who works at a clinic that a P.A. there told her I should get checked for Carotid Outlet Syndrome, which is a life-threatening condition. I get yearly physicals and everything is in normal range, have always had low blood pressure. Do you think I should go back to my doctor (since I was still not in well condition when I went in, I don t recall what all was checked out).