I think it is too high. If I remember correctly, the Armour site dosage recommendation is starting on 30 mg, going up increments of 15mg every 2 or three weeks.
I had trouble switching over from thyroxine and had to start on a low dose, because i was sensitive to the active T3 in the ARmour. Of course, everyone is different - some people can tolerate more than others. And from I have read here, there are many ways to convert over to armour. Some go straight on to it, some overlap and reduce the thyroxine as the armour is increased. Also, some people start at higher doses or armour than 30 mg.
However, if you are having these reactions - you are on too much as a starting dose.
Finally, the trick is to multidose. I found it especially useful in the beginning until I could tolerate the T3. The t3 reaches its peak about 2-3 hours after taking the dose.
I usually take half in the morning and half in early afternoon. ( I am on 60 at the moment)
I struggled for a long time - part of the problem was that i had too much thyroxine still in my system
( since the T4 has a half life of a week) and taking more than a very minimum dose of Armour (15 mg or even a half) was too much for me. So, this is something to consider. Also, my body was so sensitive to the T3, it took a while to work up while going down on the thyroxine.
Anyway, after thinking I was giving it up on a few occasions, I stuck to it, because during the transition, even though it was difficult and frustrating, I experienced moments of well-being and changes in my body and mood that I never achieved with thyroxine only.
It is worth the effort!.
Finally, don't feel overwhelmed thinking you may have a difficult period ahead, you may end up like many others here and have an easy conversion to armour.
Just tread carefully, the T3 is very powerful and you will suffer the consequences of a slip up or over dose with lots of unpleasant side effects - something that won't generally happen with thyroxine. But, palpiations, sweating etc, all will pass eventually. We have all live through it.
I would like to recommend for you to take half or even less, but I think it is best for you to call your dr and tell him what you experienced and what you would like to do. FRom reading around the web, I have the impression that mainstream drs and endos who are wlling to let a patient try armour, often interpret a patients reaction to a high starting dose (according to Armour and me, not your dr) as the inability to tolerate ARmour. Don't fall into that trap. Work out some time table and dose level you can work on with him.
Ok. That's it for the words of wisdom. Hope this helps.