expectations

My prescription is 60 mgs, 1 grain. Cutting it in half, I took 30 mg, ½ grain, Armour thyroid at 7:00 AM. It gave me a buzz a little like a lot of caffeine, then about 7:00 PM I got sleepy, had a big headache. I assume this mean all the T3 had been eliminated. I thought ½ grain was too...