Adding T4 to T3 - confused with the blood tests... - Thyroid UK

Thyroid UK

137,645 members161,423 posts

Adding T4 to T3 - confused with the blood tests results

HelgaW profile image
4 Replies

Hello, i will be greatly appreciate any advise.

I was on T3 only for about 3 months in order to clear my reverse T3.

I took 25 mcg of T3 daily.

FT3 4,87 ( 2,30 - 7,00 )

FT4 10,5 ( 10,3 - 24,5 )

TSH 0,91 ( 0,35 - 5,50) - and this was just fantastic! I haven't had such low TSH for ages! I felt myself full of power, energy, had no palpitations etc.

Then i decided to add step by step T4.

Now i'm on 18,75 mcg T3 plus 25 mcg T4.

The results are very disappointed.

FT3 2,45 ( 2,43 - 3,98 )

FT4 0,90 ( 0,80 - 2,10 )

TSH 3,83 ( 0,27 - 4,2 )

What shall i do? I take the same quantity of T4+ T3 to be compared with T3 only.

And i feel myself a little bit worse - tiredness, fog, palpitations.

Shall i prolong my T3 + T4? Or it would be better to take T3 only again?

I'm on my own with no endo.

All the necessary supplements are taken daily , B12 and iron are in injections and infusion.

Thank you

Written by
HelgaW profile image
HelgaW
To view profiles and participate in discussions please or .
Read more about...
4 Replies
Clutter profile image
Clutter

HelgaW,

What dose Levothyroxine were you taking prior to switching to 25mcg T3 and do you have thyroid results and ranges for then?

HelgaW profile image
HelgaW in reply to Clutter

Hello Clutter,

I took 50 mcg of T4 till December, then stopped it.

THe results were as follows:

FT3 3,28 ( 2,43 - 3,98 )

FT4 1,19 ( 0,80 - 2,10 )

TSH 4,64 ( 0,27 - 4,2 )

50 mcg of T4 were the biggest quantity i could tolerate. Trying to add more i had very strong palpitations( plus all the other things - legs pain, constipation, weight increase, fog, depression, memory problems etc)

Clutter profile image
Clutter in reply to HelgaW

HelgaW,

You were undermedicated on 50mcg to have TSH 4.64.

25mcg T3 is equivalent to 75mcg Levothyroxine but T3 and T4 obviously aren't bioequivalent for you.

I'd stick with the 18.75mcg T3 and increase Levothyroxine to 50mcg and in 6 weeks raise to 75mcg. Hold at 75mcg for 6 weeks and have a thyroid function test before increasing further.

HelgaW profile image
HelgaW in reply to Clutter

Thank you, Clutter!

You may also like...

More T3 + T4 blood results and even more confused

Tiromel + 20 mcg LioThy) and 75 mcg Levo. were : TSH : 0.06 ( 0.2-5.5) FT4 : <5 ( 10-24.5) FT3 :...

Blood results after adding T3

starting the T3. TSH 0.707 (0.27-4.2) FT3 3.47 (3.1-6.8) FT4 17.700 (12-23) Reverse T3 48...

Blood test results help - Low T3 and T4

done fasting at 9.30am. The results are as follows: TSH: 1.9mlU/L (0.3-4.2) T3: 3.1pmol/L......

test results - on T3 and T4

hello Am on T3 20 mg and t4 75 mcg. Just had results from bloods, form says overtreated. GP...

Confusing first results on T4/T3

results from December on 150mcg of levo only: December result TSH 0.012 (0.27-4.2) T3 4.8 (3.1-...