Thyroid test with or without medication

[Rupcy]

Hi all..

Wanted some advice. How many days or hours gap should I give before a test of thyroid

[greygoose]

A gap of 24 hours for T4 and 12 hours for T3.

[Rupcy in reply to greygoose]

Thank u for your reply. What about tsh? The gap should be 24 hours?

[SeasideSusie Remembering in reply to Rupcy]

Greygoose means leave off Levo for 24 hours and T3 for 12 hours. Take your medication after the blood draw.

When having thyroid tests, if you leave off meds as indicated, book the earliest appointment of the morning, and fast overnight, this gives the highest possible TSH which is needed when looking for an increase in dose or to avoid a reduction.

[Rupcy in reply to SeasideSusie]

Thank u