the pharmacy gave me liothyronine in place of my cytomel and I feel an instant change. I am so tired like I was when I first discovered I had thyroid problelms.

This happened once before and I told the doctor that I needed cytomel only. Could it be that it doesn't work as well for me? Also there were two days after I ran out of cytomel that I didn't take it and I felt great. Is it possible that my body makes the t3 better on it's own? I have heard that, but when the doctor prescribed it a few yrs ago it really seemed to help......