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Thyroid UK
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Reduction in Thyroixe


Further to me post the other day about my doctor reducing my thyroxine from 125mcg to 100mcg, I have now been back for another blood test, which won't be back for a few days.

While I was there I had chat with the nurse who has given me my previous test results.... I don't really have a clue what they mean, so any help would be great, as I'm still feeling like I've been hit by a slow moving truck!!

T4 20.4 Chichester acceptable level range is 9-19

TSH 0.03 " " " " 0.35-5

Apparently they have never tested my T3, should I push for this, as I'm not entirely sure what the difference is between T 3 & 4

Thanks in advance

3 Replies

Hi BeccyD. Did you feel well before your dose reduction?




Yes in terms of my thyroid, I had been feeling really good, with good energy levels and none of the aches and pains that I now have.

I do suffer with an over active bladder, and repetitive water works infections which I take Antibiotics for daily and another drug called Mirabegron which stops me diving off to the loo every five mins, and this can some times make me feel rough, and causes my bowels to be a bit hit and miss too, but I have been all good in that department too for about a month now.

I only had the bloods done because of an odd swelling/bruising that keeps coming up on one of my fingers and a few of my toes that are getting quite scarred where the skin all peels away once the swelling goes down. So i'm not sure why they decided to change my thyroxine..


BeccyD, T4 is a storage hormone which converts to T3 via the thyroid gland, liver and other major organs. T3 is the active hormone and it is low T3 which causes hypothyroid symptoms. Free T4 and Free T3 is the unbound to proteins T4 and T3 which is available for use in the cells.

TSH is suppressed below range and your FT4 is mildly over range so your GP considers you are over medicated and reduced your dose. The lab will probably decline to test FT3 unless TSH is <0.03 but you can order private thyroid tests including FT3 from Blue Horizon and Genova via thyroiduk.org.uk/tuk/testin...


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