Timing of blood test: I would be very grateful... - Thyroid UK

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Timing of blood test

fluffyhat profile image
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I would be very grateful for advice about timing of my thyroid blood test please - I realise this has been covered often but as I have altered the timing of taking levo and take other meds I am unsure what to do.

When I was taking my levo on waking I would omit the dose the morning of the blood test.

Currently I take mirtazepine ( sedating antidepressant around 9.30 pm..it can only be taken at night as it is sedating, I then take my levo around 3 or 4 am...this means I take levo on empty stomach, can eat/ drink as soon as I get up and leaves more than 4 hours between the 2 medications. But on the day of blood test what should I do..if I take levo as usual and have blood test at say 9am it will be too closeie about 5 or 6 hrs gap but if I leave until the next day then it will be about 36 hours gap..is this too much? My dose has been increased a few weeks ago and I still don't feel right so really keen to get an accurate result. I would appreciate any information thank you .

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Jazzw profile image
Jazzw

If you have a blood test at 9am, that would actually be a 29hr gap, not 36hrs. :)

I think that’s fine. Get the earliest appointment you can (some blood testing centres open at 8.30) and delay taking your levo until after the test.

fluffyhat profile image
fluffyhat in reply to Jazzw

Thank you, yes you re quite right it's not 36 hrs! I just want the results to be as accurate as humanly possible.

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