Please advise! T3 for 7 days, dosage OK? - Thyroid UK

Thyroid UK

141,246 members166,490 posts

Please advise! T3 for 7 days, dosage OK?

TaraJR profile image
5 Replies

My GP gave me T3 a week ago, after a veiled comment re a T3 trial from endo. I'd been on 150/175 levo previously. GP said to take 10mcg T3 twice a day, and said to stop levo. I had 2 days when my heart seemed a bit fast sometimes, but no side effects since. I assume this was because I still had levo in my system?? I've had huge exhaustion for 18 months.

This week I haven't felt 'normal', but definitely less bad!! But will the levo now be leaving my body? Do you think I'll need a higher dose of T3? How long does T3 take to work?

March test - TSH 0.04 (0.35-3.5) T3 4.2 (3.8-6.0) T4 21 (8.0-21.0)

My GP is phoning me tomorrow to discuss. Help please, not sure about doses etc!

Written by
TaraJR profile image
TaraJR
To view profiles and participate in discussions please or .
Read more about...
5 Replies
shaws profile image
shawsAdministrator

Hi TarjR

Your doctor has erred on caution as many don't know best how to prescribe T3 but at least he has which is good news for you.

First he stopped levothyroxine 150/175 and provided 20mcg daily of T3. The only problem I can see that he has reduced your thyroid hormones drastically, i.e. 20mcg of T3 is equal to around 60mcg /75mcg of levothyroxine.

What is usually done is reduced levo by 50mcg and add 20mcg T3.

T3 is absorbed into our body quickly - within 3 or 4 hours, I believe. It has to saturate our receptor cells and then its 'effect' lasts for between one to three days. We have billions of receptor cells and T4 (levothyroxine) is inactive and its purpose is to convert to T3 but doesn't always do so efficiently.

If your GP hasn't tested your B12, Vit D, iron, ferritin and folate ask for these as we can be deficient.

When your next blood test is due it should be the very earliest possible and don't eat before it. Also allow about 24 hours from your previous dose of hormones and take it after blood test. This allows the TSH to be at its highest as that seems to be all the pay attention to and isn't the best way for a patient to recover.

You can say you have taken advice from NHS Choices Thyroiduk.org.uk.

TaraJR profile image
TaraJR in reply toshaws

Thank you Shaws. This is useful info. I'll see what my GP says.. he knows me well, and is usually easy to talk to. He just wants me to be well again. My daughter is expecting twins in a few weeks, and I just want to feel well enough to enjoy them, and to help her too.

Clutter profile image
Clutter

TaraJR,

As I commented previously 20mcg T3 is equivalent to 60mcg Levothyroxine and your GP should have prescribed 3 x 20mcg daily if s/he wants you to stop 175mcg Levothryoxine.

________________________________________________________________________________________

I am not a medical professional and this information is not intended to be a substitute for medical guidance from your own doctor. Please check with your personal physician before applying any of these suggestions.

TaraJR profile image
TaraJR in reply toClutter

Thank you Clutter. Yes I remember your previous info. Today I was trying to see if anyone else had been swapped to T3 alone Maybe I didn't make that clear, as I was in a hurry! I really value all these comments, and this forum.

Clutter profile image
Clutter in reply toTaraJR

TaraJR,

I've been switched from T3 to Levothyroxine, and Levothyroxine to T3.  I was switched from 60mcg T3 to 200mcg Levothyroxine, and a few months later, from 150mcg Levothyroxine to 60mcg T3 and back again to 150mcg Levothyroxine.

Not what you're looking for?

You may also like...

T3 dosage

Good morning. I now have my private prescription for T3 and this morning have had my bloods done....
YSpencer profile image

Advise with T3 please

I'm a 24 spanish boy. When I was 12 I put on weight so I did a blood test and the doc said I was...
iosu profile image

New Thyroid blood tests. T3 advise please.

I've attached my latest bloods. All done before I take daily dose of levo and stopped all vitamins...
HelenR23 profile image

T3 dosage

My T4 to T3 conversion is poor. This is me trying again to manage the introduction of T3. Private...
arTistapple profile image

Advice for starting T3 - dosage levels for T3 and T4

First of all, I want to say thanks for this site and to all those who have helped me get more...
Trisha15 profile image

Moderation team

See all
PurpleNails profile image
PurpleNailsAdministrator
Jaydee1507 profile image
Jaydee1507Administrator
SlowDragon profile image
SlowDragonAdministrator

Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.

Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.