I have started getting odd dizzy spells which come and go throughout the day. They are not bad enough to make me feel really ill or want to lie down, but are still a bit of a worry - it is like that feeling you get when you have had just too much alcohol and the room starts to spin - no nausea tho (plus I haven't been drinking !). I am taking thyroxine - has anyone experienced dizzyness as a side effect ?