I had new blood test results this week and I've just brought up a set of results from 4 years ago when I felt my thyroid was well-treated. At that time I was on 100 T4/20T3. My free T3 them was 7.4(range 4.1-7.9) and most striking,my TSH 0.18 (0.3-5.5) My very low TSH was not surprising as I'm hypopituitary too,and also implies that my free TS were high enough. I was on just 100 T4 when my current test was done though I'm now going back to T3,despite my newish consultant wanting me off it. The then results were my FT3 is 3.7 (only half what it was) and TSH has shot up to 3.7. I'm reading this surge as my low pituitary is trying like the clappers to get my FT3 up again but my thyroid can't keep the supply going. My endo wants me to up my T4 but I know of old that I go back to loads of FT4 but still low FT3 (possibly a conversion issue?)so I believe, on the back of the old tests,that adding T3 will not just raise my FT3 but also bring my TSH down.
Sorry for the protracted post,but have any of you experts and mods any comments?