I could only stay on Levothyroxine for 5 weeks because it gave me bad acne. As soon as I stopped it, the acne went. I know I am not alone as I did a google search and found this forum;
My doctor doesn't believe me. I'm already suffering hair loss, so the acne on top made me feel even more horrible. I'm now on T3 only and I hope I don't have the same problem.
It could be the fillers the companies use, but I did try all 3 different brands, and the acne just got worse day by day.