Re: Hyersensitivity to meds
In almost two years of reading and learning about hypoT, I have never heard of "prevention" of hypoT. I don't believe it's possible. The meds for hypoT are exact bio-duplicates of the hormones that a hypo body doesn't produce on its own. They aren't chemical substances like aspirin or statin drugs which alter or counteract the body's own natural processes. If you don't need hormone supplementation at this time, you shouldn't be taking it. (It would be the same as taking insulin if you aren't diabetic.) Taking it if you don't need it could easily cause the problems you're having. The T3 in a dose of unneeded Armour would cause chest pain and digestive upset.
You should have had your free Ts measured before you started this med. Do you have results from those? If they were above the middle of the range, I would say you were given Armour prematurely, and you don't need it yet. If you have Hashi's, you will need it eventually; but maybe now isn't the right time.
Is Armour the only med you've taken for Hashi's so far? Or are there other hypoT meds you've had this reaction to?
I ask this because I was "hypersensitive" to Synthroid. It caused severe muscle and joint pain, anxiety, and anorexia. After 12 weeks, I had to stop it because it caused hyperT in the smallest dose. Armour is not doing that, and I'm successfully taking it.
So, if in fact, your free T levels are low, and you do need something to boost them, you could try a T4 only med, which may work better for you if you don't need T3. If your levels aren't low, you should wait till they are.