Hi Tammy, i too take thyroxine, i take 150mg a day now, it used to be 100mg. I increased my dose myself without the doctor to see how i felt, i have been on this for 12 yrs, and taken all sorts of doses. I have more energy and not so much brain fog since i upped the dose, i hope it lasts. I had my thyroid gland removed because it was overactive. How much thyroxine do you take?