Three grains of Armour is about 180mg.
That is the equivelent of 300mcg of synthroid.
If you are taking ten grains of Armour, that is the equivelent of 1,000mcg of synthroid.
The average thyroid patient with NO THYROID needs between 100mcg and 250mcg of Synthroid to control their hormone level.
Unless you weigh 600 pounds, you are taking 4-10 times as much medication as you should need. That is very serious.
How long have you been on that dosage?
How often are you getting your blood tested?
If this has been going on for some time, what does your doctor say? Have you been doing this for months and 6.0 is as low as your TSH will go?
Did you get a copy of your TSH and other lab valuess? If not, I would recommend that you do and now that medhelp has added the tracker, it is a great place to keep up with all of that.
Take care.
Normally opitmium levels of Armour are 3 to 4 grains - maybe 5 max
Do you have a thyroid? HAd surgery? RAI?
What are your FT3 and FT4 testing levels?
HAve you had adrenal testing? and what type of doctor is treating you?