Why is my appetite increasing on levothyroxine?

Question

I'm on 0.25 mcg. I've been on it a couple of weeks and I do feel quite a bit better mentally and physically already, but my appetite has increased a whole lot. I thought levothyroxine was supposed to decrease the appetite a little bit. I'm confused here.

Answer 1

Levothyroxine is a thyroid hormone substitute. Excess thyroid hormone stimulates appetite.

Answer 2

if you were symptomatically low, your appetite and energy were both supressed...as you return to homeostasis, your body energy needs will increase and so will appetite.