I have been taking 2 1/2 grains of erfa each a.m for approx 18 mths. I also take 25 t3 split into 1/3 each day, I am coming to the end of my erfa and have to swop to armour soon. Could anyone advise me how best to go about this ?
Is it ok to just stop the erfa one day and start armour the next or should I alternate days of each or mix them together ? Also do the strengths of grain differ ?
I cant get hold of erfa anymore I dont think
I'm in the same position as you. I've been replacing 1/4 grain ERFA with Armour for a week, then was going to go to 1/2 grain the next week and so on. This is how I switched from Armour to Naturethroid years ago, and then Naturethroid to ERFA. I don't ever stop one and go straight to the other, I just add bits in gradually. However I didn't try Armour at the time of its reformulation and don't like what I have just bought. It's like a powder, dissolves into nothing and tastes of chalk, I can't believe there's anything natural in it. I've also been having slight palpitations and feeling tired so today went back to ERFA only.
I've found a pharmacist selling 125mg ERFA and despite the inflated price am going to get some to tide me over for a while and then try switching to the ones from Thailand whatever my GP says about them. My GP is happy to monitor me provided I take what he calls a recognised brand.
Erfa or Armour
The difference between Armour and Erfa
Converting from Armour Thyroid back to Metavive 11
Switching from Armour to Nature Throid 
armour (being told now must take erfa)
