Hi I'm on 80mcgs of t3 and thinking of swapping in some NDT as I had an episode of atrial fibrillation. Can anyone give me a rough idea how much NDT I should add if taking out 20 mcgs of t3 as an example? I know that may be self defeating because knowing my body I'll turn it all into rt3 but I'm feeling nervous after my recent experience and suspect my body couldn't down regulate my t3 levels during a high adrenalin/cortisol episode involving a wasp (which I am very phobic of) which may have triggered the A fib. If I had some t4 in the system it seems to me my body could have shunted some of it into rt3 as needed and perhaps avoided causing a short, temporary over medicated episode. It's only a theory but the best one I can come up with.