Aa
Aa
A
A
A
Close
1070570 tn?1283436213

Reverse T3 and treatment

have been told I have a conversion issue due to a high RT3 level in April (352)- don't convert T4 to T3 optimally, instead it converts to RT3 which cancels out the T3 that's trying to get into my cells. That's why I was wondering if increasing the synthroid was just gonna increase my RT3 and make me feel worse. When I was feeling better in April I wasn't taking any synthroid I was on 50mcg cytomel, but i started to have hyper feelings so he halfed my cytomel dose to 25mcg and added 25 mcg synthroid and I haven't felt good since. But I will mention an increase of synthroid to my doc to see if that helps.

I have noticed from reading old posts on here that most people aren't taking over 10 mg of cytomel. I am on 35 mcg at the moment.
Has anyone ever been treated solely on T3 and had success? what dosage?

Also, do you split your cytomel pills? I use a pill splitter and can never get them halved just right. Does anyone else have problems getting an even split?

If I do start splitting my doses up twice a day, then do I need to avoid food before taking my next dose of cytomel or does food not affect absorption of cytomel? And what's the latest time I should wait before taking cytomel so that it doesn't affect my sleep?

Best Answer
Avatar universal
Do you have recent labs and reference ranges?  Cytomel is much more powerful than Synthroid (about four times more powerful).  So, if you subtract 25 mcg of Cytomel from your regimen, you ought to be adding more like 100 mcg of Synthroid.  It sounds like your doctor might have left you undermedicated in the switch to Synthroid.

I have no personal experience with Cytomel-only therapy, but I do know of people who have been treated with T3-only temporarily.  Dosage is very individual, and what others are taking will not apply to you.

Food does not affect Cytomel like it does Synthroid.  You don't have to fast before taking it.  Once again, when to take your last dose is very individual, and you have to experiment with the time to see when it provides the best energy boost without disturbing your sleep.  I'd start out not taking it after 3 pm, but that's just a starting point.
3 Responses
Sort by: Helpful Oldest Newest
Avatar universal
Your RT3 is high, but your FT3 is high, too, and it's the ratio of FT3 to RT3 that's important, not raw numbers.  In my opinion, your numbers do not show RT3 dominance.

Your FT3 is is high, and that needs to come down some more, even though it was even higher in April (please verify those FT3 numbers for April and July).  At the same time, your FT4 is below range and has to come up.  I think you should talk to your doctor about decreasing the Cytomel and increasing the Synthroid.  That will get your FT3 and FT4 back in balance.  When your doctor took away part of your Cytomel and replaced it with Synthroid, he didn't prescribe nearly enough Synthroid to compensate for the decrease in Cytomel.  Overall, your medication level has dropped significantly.

What are your current symptoms?
Helpful - 0
1070570 tn?1283436213
TSH (range 0.450-4.500)
Oct'09-      4.340uIU/mL
April '10-    0.07
July'10       0.082

FT4(range 0.82 - 1.77)
Oct;09       1.55 ng/dL
April '10      0.17
July'10        0.60

RT3 (range 90-350)
Oct '09      352 pg/mL
April'10      44
July'10       166

FT3 (range 2.0- 4.4)
Oct'09        2.8 pg/mL
April'10       15.4
July '10       6.7

Ferritin (range 13-150)
Oct '09       32 ng/mL
April'10       18
July'10        36

currently taking: 35 mcg cytomel, 25 mcg synthroid, 10 mg hydrocortisone
Helpful - 0
Have an Answer?

You are reading content posted in the Thyroid Disorders Community

Top Thyroid Answerers
649848 tn?1534633700
FL
Avatar universal
MI
1756321 tn?1547095325
Queensland, Australia
Learn About Top Answerers
Didn't find the answer you were looking for?
Ask a question
Popular Resources
We tapped the CDC for information on what you need to know about radiation exposure
Endocrinologist Mark Lupo, MD, answers 10 questions about thyroid disorders and how to treat them
A list of national and international resources and hotlines to help connect you to needed health and medical services.
Herpes sores blister, then burst, scab and heal.
Herpes spreads by oral, vaginal and anal sex.
STIs are the most common cause of genital sores.