I recently wrote on here about whether to have a private blood test when on T3 only, and I know some felt it wasn't needed, and up until now I haven't been too bothered either, as my GP lets me get on with it, but something has now happened that makes me ask what in fact happens to the FT3 if I do decide to go privately and have it tested?
Unfortunately I was caught on the hop a couple of weeks ago by the the hospital checking me when I was there for something entirely different, so I assume my FT3 was pretty high as I had just taken my T3 medication. TSH was suppressed of course, FT4 was 0.3 (range 11-24) and FT3 was 10.2 (range 4 - 6.8).
Am I right in thinking that if I had not taken the T3, say overnight, that the FT3 might have been within range? I know we are told on here never to take meds before testing, but would it be likely to drop quite significantly?
The specialist at the hospital, who is a Gastro, has now written to the GP suggesting that I am overdosed on T3. I am thinking of doing a Blue Horizon test privately on just the FT3 to demonstrate the difference and explain to my GP in case she contacts me. If I do this, how long should I go without T3 before testing? Would overnight be enough? Obviously being T3 only I feel the lack of T3 pretty quickly.
Thank you in advance to anyone who knows.....