Is it possible to have RT3 problem if you convert normally?

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Hi,

Is is possible to have a problem with RT3 if you convert normally?

I have tried all varieties of thyroid meds with varying success but am still

fagitued and heavily spaced out (T4 makes that worse).

I currently take T4 only and convert T4 to T3 normally according to blood tests

and 100mcg gives me a supressed TSH and a T4 and T3 that are top of the range,

so they look spot on in terms of results (any more than 100mcg makes me hyper

and in fact I do feel slightly hyper at times on 100mcg).

But I don't really feel a great deal better. I've been wondering if RT3 could be

my problem but before spending out on tests/visits to doctors/ time and effort

of switching over the meds and the pain it puts me through I wanted to know if

it's possible to still have the problem if everything else looks 'text book'.

Many thanks,

Cindy