Even though
cytomel is a fast acting med, it still takes time
for your levels to even out. I was on it
for several months before my labs caught up. In addition, when on more than 5 mcg cytomel/day, it's best to split it into multiple doses (some people even split 5 mcg, but I found that 2.5 mcg/dose did nothing for me). Just make sure you space it throughout the day to stay steady and take the last dose early enough in the day/evening for it to be worn off by bedtime.