Bloods : I have been on T3 T4 combo trial for... - Thyroid UK

Thyroid UK

139,069 members163,214 posts

Bloods

Flecmac profile image
4 Replies

I have been on T3 T4 combo trial for 8 weeks. I’m having bloods 9am Tuesday morning and although I know not to take Levo til after bloods, I’m not sure about T3 (I’m taking 15 mcg split into 3 x 5mcg doses through day). I will be fasting.

Thanks ☺️

Written by
Flecmac profile image
Flecmac
To view profiles and participate in discussions please or .
4 Replies
Lalatoot profile image
Lalatoot

Last T3 8 to 12 hours before test. So take your 3rd dose of the day before sometime after 10pm. Doctors seem to prefer the last dose of T3 to be 2 - 4 hours prior to test. This gives the highest T3 level. 8 - 12 hours gives you the lowest level of T3 - say nothing if asked!

Flecmac profile image
Flecmac in reply to Lalatoot

Thanks. So take T3 as normal then really.

Lalatoot profile image
Lalatoot in reply to Flecmac

Yes just don't take your morning dose on the day of the test till after the test.

Flecmac profile image
Flecmac in reply to Lalatoot

Thanks ☺️

You may also like...

Dosage before a blood test

25mcg of T3. I take both upon waking. I’m having my blood drawn on Thursday morning about 8.30am....

T3 adjustment and blood work

I had my blood draw this morning and will see internist the first of the week. I’m having shakiness,

High Cortisol blood test

March test I have added T3 to my levo. I’m now on 40mcg of T3 in three split doses. I’m also on...

NHS T3 Blood Testing.

asked again about T3 blood testing and got told they don't do it. Surely if someone is taking T3...

T3 Low blood pressure

indicate low blood pressure! My pulse was 104. I have recently upped my T3 dose. Can T3 cause low...