underactive thyroid
"I am on 60mg of Armour.  I was on Cytomel and felt better.  My numbers got worse so my doctor switched me to Armour.  It's okay, but I still can't lose those 10 lbs. that I want to and I've never had a hard time losing weight. I get really tired at night too. I like the idea of Armour since it's been around for so long, but I just wish I could lose this weight and have a little more energy at night."