Cytomel (T3) only or along with NDT (T3&T4)? - Thyroid UK

Thyroid UK

137,755 members161,554 posts

Cytomel (T3) only or along with NDT (T3&T4)?

TJC123 profile image
9 Replies

How do i know if I'm to do Cytomel alone, or combine it with my Synthroid-S, which is a NDT comparable to Armor. Here are my labs:

TSH 2.37 (.40-4.5 mIU/L)

RT3 21 (8-25 ng/dL)

T3, Free 2.7 (2.3-4.2 pg/ml)

T3, Uptake 28 (22-35%)

T4, Free 1.0 (.8-1.8 ng/dL)

T4, Total 8.0 (4.5-12.0 mcg/dL)

T7 2.2 (1.4-3.8)

I figured my T3 to RT3 is at 12.9, so my dr. put me on Cytomel only 3 weeks ago. I haven't been feeling any better so far. Any advice? Thank you all.

Written by
TJC123 profile image
TJC123
To view profiles and participate in discussions please or .
Read more about...
9 Replies
galathea profile image
galathea

If you have high reverse t3 its because the t4is being converted into rt3. If you stop taking the t4 for a while and survive on t3 only, then the rt3 should clear. Then you have to work out wht the t4 was turning into rt3 before goung back on it.

Never heard of synthroid s but synthyroid is the american equivalent of the uk version of thyroxine and its definitely not ndt... Ntd is made from dried pigs thyroid gland whereas synthroid is made purely from chemicals in a laboratory.

Who makes the synthroid s and whar are its ingredients?

Xx g

TJC123 profile image
TJC123 in reply to galathea

Thank you galathea for your response. I understand that T4 converts wrongly into RT3 and that RT3 needs to be cleared by using just the Cytomel alone. Is that what people are doing, using the Cytomel and then going back on a combo of NDT with Cytomel? How are they figuring their dosing? By how they feel or getting frequent labs done, I suppose, right?

humanbean profile image
humanbean

I'd love to see a link to "synthroid-s". I've googled for it, and looked for it on drugs.com but I can't find any links for it.

Can you tell us what the active ingredients of it are, please. I'm actually wondering if your doctor is conning you about what they are prescribing for you! Does it come in branded packaging? Does it have a patient information leaflet?

TJC123 profile image
TJC123

Ugh, sorry. I think it's called Thyroid-S by <company name> in Thailand.

humanbean profile image
humanbean in reply to TJC123

Ah! I understand now. Brain fog gets us all. :)

Amers123456 profile image
Amers123456

Are you hyper ou hypo

Amers123456 profile image
Amers123456

For tjc123

Amers123456 profile image
Amers123456

I don't understand your result ranges? Are you in uk?

helvella profile image
helvellaAdministratorThyroid UK in reply to Amers123456

View her profile - the original poster posted this in her first post:

I live in Texas, USA.

Which also explains the odd T7 and T3 uptake tests.

You may also like...

Lab Results on 2 grains NDT - Switching to T3 Only

range) Ref Range: 4.5-12.0 mcg/dL T4 Free: .9 (in range) Ref Range: .8-1.8 ng/dL T3 Free: 2.4 (in...

Going bach to levo T4 only from T3 and ndt

Hi, Im going back from T3 / NDT on levo due to many symptoms. I decreased t3 and increased t4. Now...

High reverse t3 on T4 only

0.247 (0.27-4.2) Free T4 21.8 (12-22) Free T3 3.61 (3.1 -6.8) Rt3 30 (10-24) FT3:RT3 7.83

Changing from NDT to t4 only

TSH is suppressed at 0.01( 0.35-4.94) and my free t3 and free t4 are optimum and I feel really...

is the T4:T3 ratio in NDT wrong?

that the T4:T3 ratio in NDT is completely wrong and increases the risk of T4 to rT3 conversion:...