Hi, sorry to asking a question like so many others but I've been on 125 mcg for years and suddenly my requirements have gone up for no known reason. I tried to ask for figures but the most I could get from my doctor (telephone only these days unfortunately) is my TSH was 5.9 when normal is between 3 and 4.5. This doesn't seem to tie in with figures I've seen mentioned on this site. T4 was normal and no free T3 was done.