If you know your thyroid is shot, theres no harm in taking Armour starting at a low dose, lots of people are doing it.
you can easily buy it on the internet and loads of people are treating themselves.
Sometimes you should start treating adrenals for a couple of weeks before the Armour, if your adrenals are shot.
i started Armour myself without my doctor and feel alot better, i told my doctor today that i started treatment and he was quite happy with it.