Timing of taking T3 before Blood Test

[bessygo]

Sorry to keep asking this. I take my T3 with my Synthroid between 11pm- Midnight. If I am getting a Fasting Thyroid Panel Test at 8 am, should I NOT take my T3 at 11pm? If I don't take my T3, that would be 31 hours without it in my system. I don't want to get a false result showing my Free T3 to be lower than it is when I take my T3. My dr only gave me a 3 week supply of T3 and I need to be sure my lab result is correct since I am just starting on this. My previous Free T3 with just Synthroid was 2.5 (range 2.3-4.2). (I've already posted vitamins/iron, etc.) This is strictly about timing. I know NOT to take my Synthoid prior to labs.

[Judithdalston]

Should leave 8-12 hours from taking T3 to testing, so 11pm ok.

[bessygo]

I don't take my synthorid/levo in the a.m. As I said I take around midnight.....so you're saying to take my T3 at 8 pm (20:00 UK time) instead, the night before my fasting bloodwork?

[SeasideSusie Remembering in reply to bessygo]

Judithdalston is correct. Take T3 8-12 hours before blood draw, so your 11pm normal time is fine.

As for Levo, I alter the timing of mine the day before the test so that I have a 24 hour gap.