Blood Results 8/12/17 on Levothyroxine 100 mcg and Liothyronine 20mcg
Free T4 13.00 (9 -25)
TSH 0.05 no range given
Free T3 4.4 ( 3.5 -6.5)
Liothyronine increased to 30 mcg on 9/1/18
Blood results on 16/3/18 - advised to repeat bloods 2 months after increased dose
Free T4 13 (9-25)
TSH < 0.05
Free T3 5.2 (3.5 -6.5)
I had understood that once treated TSH level becomes irrelevant but have seen comments on this forum that having TSH within range helps with T4 conversion. I also saw a comment by someone saying she felt better with T4 in upper end of range even when T3 was good.
I have been hypothyroid for 24 years. About 8 years ago I had T3 added by an endocrinologist and it was a major breakthrough for me. I had assumed that I had autoimmune thyroid disease but the only time I have antibodies tested was last December when they were normal but wasn't sure of significance of this so long after initial diagnosis ( my thyroid gland is almost non existent on ultrasound).
I have a very supportive GP so when I started to feel symptomatic again she agreed to increase my T3. At the same time I have been addressing my vitamin levels and they are improving with supplementation. My symptoms have improved with the increased dose of T3 but I still don't feel as alert and have as much energy as I have done previously. Of course I am getting older all the time which may be relevant!
My T3 is now in upper end of range but my T4 is still at bottom of range . I am wondering if I am still able convert some T4 to T3 and if this might be improving with better vitamin levels. In that case might it have been better to increase the levo rather that the liothyronine? I realise this might be a case of trial and error but would value any comments.
I did post on the same subject a few days ago but didn't get much response so I'm trying again. I have not included all the vitamin levels again in the interest of brevity. I'm see my GP next week and want to go well informed.