This what Medichecks advises when doing an advanced thyroid test:
‘If you are taking a T3 containing medication take your test in the hour prior to your dose of medication.’
Why do they advise this? From what I read on here this is not correct?
I would like to know what people think as I take NDT + Levo and plan to do this test soon.
Well, it's a bit meaningless, isn't it. Because you could take your 'medication' at any time, it's not as if there's a fixed time to take it. But, if they're assuming that you split your dose and take it every twelve hours, then that would be more or less the advice we give here - a gap of 8 to 12 hours. And, they do think that is THE correct way to take T3. Remember they are only NHS-trained GPs, not thyroid specialists. 
Thanks greyhoose it is meaningless- I was reading it as taking the medication in the hour before doing the blood test!! Brain clearly not working - I suspect I need to increase my dose 😂
I would take the test about half way between T3 doses, this will give a rough average fT3 level. Taking the blood one hour before your next dose will give a false low fT3. They should justify their advice, not just say something off the top of their head. Other doctors are more cynical and say to take the blood two or three hours after the last dose, they know this is when you will get a very misleading false high fT3. You can't trust these doctors!
I take one daily dose of T3 and I take it when I awake with one glass of water.
On the morning of the blood test I take it after the blood draw and have done so for several years and never have had a query yet.
The best part is that I have no clinical symptoms and feel well.
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Advice on taking T3 and Levo before a blood test
