does t4 rise first when increasing synthroid?
synthroid increase: does t4 rise first when... - Thyroid UK
synthroid increase
![Mccrae profile image](https://images.hu-production.be/avatars/c71a4888ec87469192b0dd6e2ad9a5cd_small@2x_100x100.jpg)
Written by
![Mccrae profile image](https://images.hu-production.be/avatars/c71a4888ec87469192b0dd6e2ad9a5cd_small@2x_100x100.jpg)
Mccrae
To view profiles and participate in discussions please or .
Read more about...
1 Reply
•
You mean before FT3? Yes, because it takes time for the T4 to get converted to T3. It's not instantaneous. And it takes even longer for the TSH to react to the new levels after an increase. Which is why we say that you need to leave at least six weeks before retesting.
Not what you're looking for?
You may also like...
To increase or not yet?
Morning,Just want to check what you all think.
I'm trying to get from 75mcg levo - 100. Went...
Advice please- should I increase T3 a little now, as advised by prescriber or do bloods first?
Looking for some advice. I’m a few weeks into an increase of levo, back up to 100mcg from 75mcg. I...
Any tips on getting through an increase in levothyroxine and feeling a bit rubbish
Hi everyone, after a too quick reduction in levothyroxine and an return of symptoms I’ve had an...
Dose increase - worse anxiety
I'm nearly at 4 weeks of a dose increase. From 75 to 75/100 alternating. I got a new brand (aristo)...
No increase in T3 despite asking endo.
I had my endo telephone appointment yesterday. Because of the blood test results she will not...