Hi, I've been diagnosed hypothyroid and on Levothyroxine for 5 years now. I am feeling lethargic (to the point of falling asleep at work/on public transport and missing my stop regularly) cold, muddled thinking most of the time and never really felt any different since being on Levo. I've just received my blood test results (I asked for free T3 to be included this time) and my free T3 is 3.8, TSH 2.52 and free T4 17.8. I have asked if I could be prescribed T3 even for a few weeks to see if it makes a difference. My GP won't listen and refuses to prescribe T3 as he doesn't know enough about it he says! He is prescribing 116 T4 Levothyroxine. I want to know how to buy T3 and how to work out the dose - can you help?