I am being treated for breast cancer (since October) taking Letrozole. This coincided with my annual thyroid bloods. I managed to get this from the hospital, GP seems reluctant to provide me with them. Results are October 2015
Free T3 4.6 pmol/L 3.1 - 6.8
TSH 0.02 mlU/L. 0.30 - 5.00
My GP reduced my 75mcg levothyroxine dose to 50mcg
Another blood test 18 January
Free T3 4.3 pmol/L 3.1 - 6.
TSH < 0.02 mlU/L. 0.30 - 5.00
Then as a result reduced Levothyroxine to 25mcg.
Am I missing something? I have never felt over medicated or is it possible the Letrozole which I understand is hormone based is interfering with the thyroid medication? I take them at least 8 hours apart. I feel rubbish very tired, though i have never felt brilliant. I was diagnosed hypothyroid some 12 years ago.
Waiting for more bloods.