Thyroid UK
90,438 members104,806 posts

Help with blood test results

Hi everyone,

I am hoping some of you will be able to offer some advice with my latest blood test results?

I was doing well initially on Armour thyroid but seemed to feel worse and worse again. I saw Dr Peatfield back in May and he thought I had a problem with my adreanals and advised me to cut back from 2 grains Armour Thyroid to just 1. Unfortunately he has been in hospital and I am not sure if I will get to see him again.

In the mean time I had my thyroid blood tests done by the NHS and also had a low cortisol result. I have just been tested for Addison's today but have to wait a couple of weeks for results.

I have just collected my latest blood tests results and thought it was strange how low my FT3 and FT4 were? I take 1 grain (60mg) a day.


TSH 0.53

FT3 4.2

FT4 10.1

I was not given the reference ranges but I believe the FT3 starts at 4 and FT4 at 9?

If anyone can shed some light on these results I would be most grateful as I feel with the TSH I can't increase the dose?

Many thanks


1 Reply

The TSH is irrelevant. Once you are on thyroid hormone replacement, it doesn't matter how low it goes - doctors think it does, but it doesn't. And, when you are taking NDT, the only important number is the FT3. You certainly look as if you need an increase!


You may also like...