Hi everyone,
After being underdosed on 25mcg of Levothyroxine for almost a decade, my new GP increased my dose to 50mcg around 6 months ago. The increase was done slowly over 6 weeks, as advised by people in this group. I had some blood tests done two days ago and today I got a message from the GP saying that my dose needs to be adjusted. Test results are below:
Serum TSH level < 0.03 mU/L [0.35 - 5.5]; Below low reference limit
Serum free T4 level 26.4 pmol/L [10.5 - 21.0]; Above high reference limit
Serum ferritin level 56.4 ug/L [10.0 - 291.0]
Serum total 25-hydroxy vitamin D level 151.2 nmol/l
I’d actually gone for other tests and wasn’t expecting thyroid bloods to be done and had taken my Levo a couple of hours earlier but the nurse added on the thyroid test when I got there. The penny didn’t drop until I got home. I was feeling pretty awful on 25mcg and I did feel a small improvement when my dose went up but I'm now feeling equally awful and getting a lot of palpitations. I've had Long Covid for over 3 years, have ME and was recently diagnosed with hypotension. I also started a trial of HRT around 5 months ago on the advice of my ME doc. Any thoughts/guidance on what might be going on and where to go next with this would be very gratefully received!
These are my previous test results (done at a private lab):
Triiodothyronine (FT3) 4.1 3.1 - 6.8 pmol/L
Free thyroxine (FT4) 16.0 12.00 - 22.0 pmol/L
Thyroid stimulating hormone (TSH) 2.97 0.27 - 4.2 mIU/L
Thyroglobulin antibodies (TgAB) 31.5. 0.0 - 115.0 kIU/L
Thyroid peroxidase antibodies (TPOab) 9.0 0.0 - 34.0 kIU/L
Thyroxine (T4) 104.0 59.0 - 154.0 nmol/L