I am hypothyroid and taking slow release T3 only supplementation for over four months now. My current dose, stable for more than a month, is 37.5 mcg twice a day (75 mcg total), morning and evening.
I have taken a blood test in the morning before my morning T3 dose. It shows a high FT3 of 7.7 (range 4.0 - 6.8), FT4 < 0.6 (virtually 0), but the most interesting part is that TSH is not suppressed, but is high at 4.3 (range 0.40 - 3.80).
I've been googling and only finding that when when either of FT3 or FT4 or both are high, then TSH should be down and in this case suppressed. So this is bizarre. Can anyone explain this? Perhaps it could give a clue to my condition and help me with treatment?