Cytomel is fine for me. Much better than synthroid, and I do not have the energy issues. One thing I do have to watch is, as my weight fluctuates, my thyroid levels do too. For me (on cytomel) TSH is a good indicator. Any time I gain or lose 10lbs or so, I often have to change doses. Other than that, on cytomel, my levels have been pretty consistent for the last 2 years or so, which is great, because on synthroid my prescription needed to be adjusted every 4-6 months. Considering it takes 3 months to get your levels re-regulated after a change, I spend more time being at the wrong levels than the right ones.