I have been on Levothyroxine 100mcg now for 8 weeks. I asked the Endicrinologist to change this medication as I was suffering with a feeling of apathy and sometimes depressed. He changed my medication to Tri-iodothyronine. As it is a private prescription, it costs over £450 for 2 weeks supply, which I obviously cannot afford. I doubt my GP will prescribe this. What are the other T3 medications that I should consider?