Thyroid test timings please when on NDT or glandulars

[musicaljune]

I know it’s been posted here a lot but I can’t remember.

Thank you

[SlowDragon Administrator]

Day before test split dose into 2 or 3 smaller doses spread through the day

Last dose approx 8-12 hours before test

Test early morning, ideally before 9am

If taking any supplements that contain biotin stop these a week before test

If test iron/ferritin, stop iron supplements a week before test

[pennyannie]

Hello Musicaljune :

I take NDT and I do not split my dose - and if I wait 24 hours my T3 and T4 fall into the ranges:

Remember these ranges were designed to be used with Big Pharma's T3 and T4 products and not NDT which you dose to the relief of symptoms.

Is this blood for just for your use or are you having to have your doctor make sense of it ?

NDT does not appear in the same way in blood test results as that of synthetic thyroid hormone medication.

Your TSH will likely be low suppressed - your T4 proportionally lower but your T3 should be proportionately higher than when on T4 monotherapy.

[musicaljune in reply to pennyannie]

It’s for my mum’s use only and she couldn’t quite remember but now says that in the past she has done as SlowDragon suggested, so will probably do it that way again for consistency.

When you say if you wait 24 hours thyroid hormones fall within ranges, are you saying you are normally over range? What about TSH, does that read as suppressed or low and do you test around 9 so that TSH reads as higher?

Thank you.

[pennyannie in reply to musicaljune]

Yes, my T3 can appear slightly over range at 10/ 12 hours - after taking my NDT :

So after 24 hours I'm sure it's in this range :

I self medicate so am not concerned by it :

These ranges were introduced to be used when taking Big Pharmas T3 and T4 :

There are no official blood tests for NDT.

My TSH is at 0,01 where it is irrespective of what medication I take if I have any chance of being well - I 'm with Graves post RAI thyroid ablation.

The TSH is a unreliable measure of anything once on any form of thyroid hormone replacement.

This TSH test was originally introduced as a diagnostic tool to help identify a person suffering with hypothyroidism and once on thyroid replacement medication you need to run on T3 and T4 blood test results and not a TSH :

Though fully understand that in primary care you may well be monitored and dosed on just a TSH yearly function test which was why I became so unwell in the first place as my T3 was never tested and my T4 tested about twice in 10 years irrespective of my failing health.

I was discharged from hospital with a TSH in range and T3 at 5.8 - then 60% through - and 10 years later I paid my doctor to test my T3 and my TSH was in range but my T3 was at 4 - 25% through and I was told I was very lucky to have any at all ???