question: Within the past few weeks Ive been getting very dizzy ( especially when standing up , but also while sitting down ) , and also , Im not sure if this is part of the dizziness or not , but Ive been sitting down , writing , and I would get the feeling that Im writing with my left hand when Im actually writing with my right hand ( which is my dominant hand ) . Ive also been sitting in a chair , focusing on something , and I would see a shadow out of the corner of my eye , then then I would look over , there would be nothing there . My only specific medical history is ADHD , which Im being treated for with the perscription Vyvanse . I dont eat anything between breakfast and dinner , ( almost 12 hours without food ) which gives me headaches from low blood sugar , but Ive been on this medication for more than 6 months and Ive never experienced anything like what I have been