T3 side effects: hi, Please can I have some... - Thyroid UK

Thyroid UK

137,880 members161,695 posts

T3 side effects

Essexlil profile image
18 Replies

hi,

Please can I have some advice. I’ve been taking 10 mcg T3 for 7 months together with 75 mcg T4.

I haven’t felt particularly any better on T3 except for an improvement in tiredness and mood. I’ve felt hyped up and breathless on exertion so I asked for an ECG. I’m 68 and they found that I have a sinus arrhythmia which has never been spotted before but GP doesn’t seem concerned.

Here’s my latest thyroid results taken on 4.1.24

Serum TSH 0.04 mlU/L (0.27-4.2) below low reference limit

Serum free T4 13.8 pmol/L (12.0-22.0)

Serum free triiodothyronine 4.8pmol/L (3.1-6.8)

As my mum suffered with Hashimotos and took NDT (overmedicated) and she had undiagnosed arrythmia she passed away aged 72 caused by undiagnosed arrythmia/sudden cardiac death.

I’m so scared as I’m now 68 and as soon as I heard arrythmia I stopped taking T3 and increased T4 to 100 mcg (my previous dose). I really don’t know which way to turn now as I thought T3 would help me. I was never breathless on T4 alone.

Any help would be appreciated as usual

Written by
Essexlil profile image
Essexlil
To view profiles and participate in discussions please or .
Read more about...
18 Replies
TiggerMe profile image
TiggerMe

Breathlessness could be due to low folate and iron levels have you had them checked?

T3 is very necessary for the heart, are these results just T4 only or before you dropped the T3?

Free T4 (fT4) 13.8 pmol/L (12 - 22) 18.0%

Free T3 (fT3) 4.8 pmol/L (3.1 - 6.8) 45.9%

fT4 is very low

Essexlil profile image
Essexlil in reply to TiggerMe

hi thank you for replying - the results are after 6 months on T4/T3.

Here’s more bloods from 4.1.24

Serum folate 8.0 ug/L <3 suggestive of folate deficiency

Serum ferritin 252 ng/mL Female ref range 13-150 ng/mL

Any help appreciated

TiggerMe profile image
TiggerMe in reply to Essexlil

So increasing your T4 was needed but I'd keep the T3 at the same level and see how that goes... low fT4 makes you feel awful and it sounds like you were benefitting from the T3.... I'd retest after 8 weeks 100 T4 & 10 T3

Your folate is on the low side, do you take a B complex?

Ferritin could be falsely high due to infection, have you ever had a full iron panel?

Essexlil profile image
Essexlil in reply to TiggerMe

Hi, oh so u think I’m under medicated. I was taking B complex but just B12 at the moment. I think ferritins high bcos I also have sjogrens. No never had full iron panel. Thank you for advice

TiggerMe profile image
TiggerMe in reply to Essexlil

Certainly your recent result show you to be under replaced, I'd aim for 60% fT4 and hopefully fT3 won't be too far behind and then you might just need a little tweak of one or the other

Essexlil profile image
Essexlil in reply to TiggerMe

Ok thank you. This is all following my endo taking me off 100 mcg T4 for three months last April, May and June. I wonder if my poor body is still catching up! I proved that I need medication so he then put me on 50 mcg T4 and 10 mcg T3. I asked my GP to increase T4 to 75 mcg a couple of months ago and now I’ve increased myself to 100 mcg but stopped T3 today

TiggerMe profile image
TiggerMe in reply to Essexlil

Yes, I had and Endo that interfered and it takes months to get back on track.

I'd get back on the T3 else you are really going to feel ropey 🤗

Essexlil profile image
Essexlil in reply to TiggerMe

Ok thank you for your help

crimple profile image
crimple in reply to Essexlil

Essexlil, it beggars belief that an Endo thought it was OK to take you off meds for 3 months. I would say that was very negligent, no wonder you are not feeling well. Does the Endo focus on TSH result? Do make sure your vitamin levels are optimal as per discussions by others on here. Hope things improve for you.

arTistapple profile image
arTistapple in reply to Essexlil

The ‘fad’ of taking patients off their medication is just plain mad. Some endos are doing this but they are supposed to get the patient’s agreement, only after they are fully informed. However what endo would understand ‘fully informed’? Bunch of quacks. But off course we don’t want to disagree with our so-called ‘helper’ so we do it. It’s downright criminal what they are doing - all this c..p for ‘our benefit’. What rubbish!

Marz profile image
Marz

thyroidpatients.ca/2018/07/...

A long and detailed read from a website that is well respected here and by the late diogenes It discusses T3 and its role in many aspects relating to heart function.

Just read the bits that resonate 🌻

Essexlil profile image
Essexlil in reply to Marz

Hi, this is very interesting, I’ve stopped taking my T3 as since taking it I’m becoming more and more breathless, but this report leads me to believe that I’m doing more harm than good but I’m scared to experiment as I’m 68 and have read that T3 should be used cautiously in elderly patients.

Marz profile image
Marz in reply to Essexlil

Your T3 dose is not high. I am 77 and take 50mcg T3 only and have done for many years. Important for B12 - Folate - Ferritin - VitD to be OPTIMAL for you to feel well.

SlowDragon profile image
SlowDragonAdministrator

Recommend you get FULL thyroid and vitamin testing 8 weeks after increasing Levo to 100mcg daily

Which brand of levothyroxine are you taking

You need vitamin D and B12 tested

Plus full iron panel test to see if iron is low or high

Is your hypothyroidism autoimmune

Recommended that all thyroid blood tests early morning, ideally just before 9am, only drink water between waking and test and last dose levothyroxine 24 hours before test

This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip)

T3 ….day before test split T3 as 2 or 3 smaller doses spread through the day, with last dose approximately 8-12 hours before test

Is this how you did your most recent test?

Private tests are available as NHS currently rarely tests Ft3 or all relevant vitamins

Testing options and includes money off codes for private testing

thyroiduk.org/testing/

Medichecks Thyroid plus BOTH TPO and TG antibodies and vitamins

medichecks.com/products/adv...

Blue Horizon Thyroid Premium Gold includes BOTH TPO and TG antibodies, cortisol and vitamins

bluehorizonbloodtests.co.uk...

Only do private testing early Monday or Tuesday morning.

Link about thyroid blood tests

thyroiduk.org/testing/thyro...

Link about Hashimoto’s

thyroiduk.org/hypothyroid-b...

Symptoms of hypothyroidism

thyroiduk.org/signs-and-sym...

Tips on how to do DIY finger prick test

support.medichecks.com/hc/e...

Medichecks and BH also offer private blood draw at clinic near you, or private nurse to your own home…..for an extra fee

Just TSH, Ft4 and Ft3 test - £32

monitormyhealth.org.uk/thyr...

10% off code here

thyroiduk.org/testing/priva...

Monitor My Health also now offer thyroid and vitamin testing, plus cholesterol and HBA1C for £65

(Doesn’t include thyroid antibodies)

monitormyhealth.org.uk/full...

10% off code here

thyroiduk.org/testing/priva...

Essexlil profile image
Essexlil in reply to SlowDragon

Hi, I take Mercury Pharma levo. My last bloods were 4th Jan and it had 8.30am draw and hadn’t taken T4 or T3 since 7am the day before so over 24 hours, nothing to eat or drink. I’ve been taking 10 mcg T3 with 75 mcg T4 together. So far I haven’t halved my T3 dose as I’m self funding and have capsules as the pharmacy have told me that tablets are much more expensive. With my breathlessness and sinus arrythmia I’ve rightly or wrongly blamed T3 not suiting me and reverted to my old dose (pre T3) of 100 mcg T4.

I’m taking 3000 mcg sublingual B12 most days (stop for a while when urines bright yellow)

375 mg pure elemental magnesium daily

3000 sublingual D3 + MK7 K2 daily

2000 mg omega 3 fish oil

My serum B12 on 4th Jan was 316 pg/mL (197-771) only taking once a week then

Serum D3 was 78.9 nmol/L <25 nmol/L deficient

Serum ferritin 252 ng/mL (13-150 ng/mL) I also have Sjögren’s

Serum folate 8.0 ug/L <3 suggestive of deficiency

I don’t really know where to turn now and need advice please

SlowDragon profile image
SlowDragonAdministrator in reply to Essexlil

Rather than just taking B12

Instead try supplementing a good quality daily vitamin B complex, one with folate in (not folic acid)

This can help keep all B vitamins in balance and will help maintain B12 levels too

Difference between folate and folic acid

healthline.com/nutrition/fo...

B vitamins best taken after breakfast

Thorne Basic B recommended vitamin B complex that contains folate, but they are large capsules. (You can tip powder out if can’t swallow capsule)

Thorne currently difficult to find at reasonable price, should be around £20-£25. iherb.com often have in stock. Or try ebay

Igennus B complex popular option too. Nice small tablets. Most people only find they need one per day. But a few people find it’s not high enough dose

Post discussing different B complex

healthunlocked.com/thyroidu...

IMPORTANT......If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 7 days before ALL BLOOD TESTS , as biotin can falsely affect test results

endo.confex.com/endo/2016en...

endocrinenews.endocrine.org...

In week before blood test, when you stop vitamin B complex, you might want to consider taking a separate folate supplement (eg Jarrow methyl folate 400mcg)

Post discussing how biotin can affect test results

healthunlocked.com/thyroidu...

helvella.blogspot.com/p/hel...

Essexlil profile image
Essexlil in reply to SlowDragon

Thank you for all of your advice - I’ve ordered Ingennus B complex. If I go back on T3 think I’ll get 20 mcg as suggested - I can’t keep paying these prices!

SlowDragon profile image
SlowDragonAdministrator in reply to Essexlil

Much cheaper to get 20mcg tablets T3 prescribed and cut into 1/4’s to get 5mcg

And many, many people find it better to split T3 as 2,3 or 4 x 5mcg per day

Most self funding get 20mcg Thybon Henning

£60 per 100 tablets

Useful info on private prescription Thybon Henning

Current prices and suppliers

healthunlocked.com/thyroidu...

Current prices NHS pays for capsules

Private probably slightly higher

healthunlocked.com/thyroidu...

You may also like...

Starting T3 Side Effects

medication being added in. First tablet at 12 today I felt fine. Second at 6pm and 2 hours later I...

Side effects of Liothyronine T3.

all over and my head went funny like warm and I felt faint. I called for an ambulance. I believe I...

T3 medication side effects

and reduced my T4 by half. 100mcg to 50mcg. I felt well for 2 weeks and then I took a dive. Pains

Long term side effects T3

vital signs she says thats it dangerous long term to continue its only been two weeks since she...

T3 side effects

levothyroxine properly. I’m now taking 150 levothyroxine and she started me on 2.5 mcg of T3 3...