Stopping meds before blood test

[infomaniac]

I'm just wondering what the latest info is regarding stopping meds?

I normally take 1/2 my T3 12 hours prior and then I take my T4 and the other half of T3 after the test but I seem to recall someone on here telling me this was wrong?

Also, how long to you need to be free of Biotin for?

Thanks a lot

[SeasideSusie Remembering]

The way you have been doing it is the way most of us would say is correct. Last dose of Levo 24 hours before test, T3 split the day before into 2 or 3 doses and the last dose 8-12 hours before the test. If you've been doing it this way before then I'd continue to do so for continuity of comparing results.

Biotin should be left off for 3-7 days depending on how much you take. If it's in a B Complex it's generally around 400-500mcg and 3 days will be enough. Larger amounts such as 5mg or 10mg often found in hair/nail supplements or stand along biotin supplements need longer so 7 days.

[infomaniac in reply to SeasideSusie]

Brilliant, thanks a lot Susie x

[Caze in reply to SeasideSusie]

If you take half a grain of NDT at bedtime ( in addition to T4/T3 combo) how should this be taken if you have a thyroid test at 8 the next morning.

[SeasideSusie Remembering in reply to Caze]

NDT and T3 are treated the same as far as timing for blood tests are concerned so half earlier in the day and half between 8pm and midnight.

[Caze in reply to SeasideSusie]

Many thanks