Last May I had RAI 131 for hashitoxicosos, since mt TSH levels have been low, with medication increases every 6 to 8 weeks, I was just raised from 137 , plus 1 extra tab per week to 150 with 1/2 extra tab per week. Last TSH reading one month ago 13.18 (range .34-5.60) Free Thyroxn .091 (range .58-1.64)...I am nearly one month into med change and becoming constioated, bloated and having herat palipitations when having bm, or after eating, I was doing this before RAI, do you feel it's just my body getting used ot the new dose,, or is it on going hypothyroidism, I have gained 14 lbs, and still have alot of pain, and other issues thta go along with hypothyroidism. My intestinal tract seems to react with evry dose change. Had a heartwork-up last April said it was ok.,, slight ishemia, but every thing else apperared fine. Are we ever completely normal after these thyroid issues?