Thyroid UK
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Blood test results on t4 and t3 advice please thank you


I have posted a few times before and I have now worked my way up to 87mcg of Levothyroxine daily (50 plus 25 and then I put another 25 in half) I also take 5mcg of t3 now and I take both at the same time very early morning. Blood tests below and I didn't take my meds before hand.

Based on this I decided to increase t3 today to 7.5mcg but had some heart Palps today. Is that normal not had them before? Will they go? Did I do the right things based on the below test and the fact my weight is increasing recently. And I'm not eating more!

My symptoms are still insomnia which has got slightly better recently. I did try taking some t3 and I also tried t4 at night and I thought it was working as it seemed to work brilliantly for first few nights but then insomnia came back and I felt even more wired so went back to once morning dosing. One thing I can say is my constipation had completely gone and I had years of chronic constipation and even operations because of it. He t3 has definently sorted it out!! So a big plus! And I have to say despite the dreadful sleep my energy in the day is great!

But weight gain since I've started messing about with t3 is half a stone more and I am hoping that goes down as I start settling in a dose. I've been doing things very very slowly as I know I have very high cortisol issues from q previous adrenal test and didn't want to stress my body too much.

Thanks for your help

Tests are

FunctionTHYROID STIMULATING HORMONE 1.3 mIU/L 0.270 -4.200

Free THYROXINE 16.59 pmol/L 12.000 -22.000

Free T3 4.31 pmol/L 3.100 -6.800

2 Replies


There's scope to increase T3 to 10mcg, probably 15mcg if necessary. Heart rate rises after a dose of T3 so you may be more comfortable splitting T3 doses 8-12 hours apart.


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.

1 like

Thanks clutter I am going to do just that and already on 7.5 and planning to go to 10. Thank you for responding to me. It's really helped.


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