Re:not taking meds before a Thyroid Blood Test

[Guest guest]

Theres been loads of advice on this elsewhere

If you take your thyroid meds before a blood test the results will be too high and your doctor will try and reduce your dose

whereas if you do not take any thyroid meds at all for 24 hours before the test it will come out correctly and you might even get your dose raised

The current parameters are WRONG plus too many doctors have the crazy notion that your Free T4 muwst be in the middle of the range which is crap

Equally when on thyroid meds especially Armour your TSH will be virtually non existant .............its bound to be because once the thyroid stops working so does the Pituarity feedback system ..........just many doctors fail to recognise this fact

[Guest guest]

> The current parameters are WRONG plus too many doctors have the

>crazy notion that your Free T4 muwst be in the middle of the range

>which is crap

What would you say are the correct parameters then Pat? And is that

only for those on medication? What are they for those not on

medication?

Thank you

[Guest guest]

Hi

Pat is

correct in that you should NOT take ANY thyroid hormone replacement whether

this is synthetic t4 or synthetic T3 or natural thyroid extract for at least 24

hours before having your blood drawn for thyroid function tests. For anybody

who is NOT on medication, their Free T4 would be expected to be just above the

middle of the reference range in the same way as Free T3 - for those on

synthetic T4 only, their FT4 and FT3should be in the upper third of the

reference range, and for those on T3 or natural thyroid extract, their FT4 will

remain in the upper third (and might be even higher) and their FT3 would be way

towards the top of the reference range, with their TSH fully suppressed. The

TSH would naturally be suppressed because there is no longer any need for the

pituitary to send out thyroid stimulating hormone (TSH) because there is

sufficient T4 and T3.

Luv -

Sheila

> The current parameters are WRONG plus too many doctors have the

>crazy notion that your Free T4 muwst be in the middle of the range

>which is crap

What would you say are the correct parameters then Pat? And is that

only for those on medication? What are they for those not on

medication?

Thank you

[Guest guest]

> For anybody who is NOT on medication, their Free T4 would be

>expected to be just above the middle of the reference range in the

>same way as Free T3 - for those on synthetic T4 only, their FT4 and

>FT3should be in the upper third of the reference range, and for those

>on T3 or natural thyroid extract, their FT4 will remain in the upper

>third (and might be even higher)and their FT3 would be way towards

>the top of the reference range, with their TSH fully suppressed.

Thanks for the clarification Sheila. I'm lagging behind on my thyroid

knowledge and am attempting to get it up to speed. I know I've read

about this before but it must have gone in and then straight back out

again, so thank you for repeating it.