Ok I get this sudden lightheadedness and dizziness out of no where sometimes. It usually happens when I am sitting or standing still and I'm really anxious but sometimes it just comes over me for no reason at all. It is a very scary feeling. I feel as if I am going to collapse and feel as if I need to shut my eyes. My vision goes strange as well. I was just wondering if it is anxiety that is causing this? I used to be on prozac for 3 years and didn't have this when I was on prozac. I didn't want to continue the prozac though because of some side effects. I am just wondering if anxiety can cause this? and what I could do to help it. Or if there is any medications that could help this. Thank you.