T4 level question?

I have been on Thyroxine now since March 2010. I currently take 75mcg and my recent blood test result showed a T4 of 17. It has gone up as before it was 15. Does it sound like I am on the right dose?

[helvella Administrator Thyroid UK]

Unlikely.

But it would help to be sure if you post a) the reference range; b) other test results (e.g. TSH); and c) how you feel?

All the best

Rod