T3 too high

[meme]

Went to GP who took bloods at 11am. He added a thyroid test that I was not expecting. I had taken my meds at 8am.

TSH 0.14. R. 0.27-4.5

FT3 7.7. R. 3.16-6.8

FR4 12.6. R. 11.0- 23.

I need to see him about results.

Can taking my meds 3 hours before test explain over range T3? I usually leave an 8-12 hour gap.

Thank you.

[Marz]

Are you taking T3 ?

[meme in reply to Marz]

Sorry. NDT

[Marz in reply to meme]

Then that could explain the over range T3 .. When was your last test done ?

[meme in reply to Marz]

The one before this was 20-2-20 at 8.30 I think, and before I took NDT.

[Marz in reply to meme]

So did the results vary much ?

[meme in reply to Marz]

Medichecks

TSH 0.656. R. 0.27-4.2

T3 4.98. R. 3.1-6.8

T4 11.7. (OR). R. 12-22

[Marz in reply to meme]

Are you concerned ? Have your symptoms changed ? How much NDT are you taking ? Sorry not had time to read your other posts..

[SlowDragon Administrator]

Recommended on here that all thyroid blood tests should ideally be done as early as possible in morning and before eating or drinking anything other than water .

Last dose of Levothyroxine 24 hours prior to blood test. (taking delayed dose immediately after blood draw).

This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip, best not mentioned to GP or phlebotomist)

If/when also on T3, or NDT make sure to take last 1/2 or 1/3rd of daily dose 8-12 hours prior to test, even if this means adjusting time or splitting of dose day before test

Testing thyroid levels soon after taking NDT will cause FALSE high result

[meme in reply to SlowDragon]

I did with medichecks but the GP one was a surprise !

He wants to see me.

I am not too bothered with the results because of the time it was taken.