I have been on thyroxine for a year and am currently taking 200mcg a day. My latest blood results have been T4 19 and tsh o.o1, my Gp has said this is where i should be but i suffer from frequent dizziness , feel spaced most of the time and still get extremely tired. I think i may be slightly hyper. Another Gp in the practice thinks i am over medicated. Any ideas?