I have an under active thyroid and after reading comments on here I started taking my medication at night. I am feeling much better and my recent blood test revealed that my tsh has reduced to 0.8 from 1.8, which I am pleased about. The problem is I have developed insomnia over the last week and I am hot and restless all night resulting in lack of sleep. Could it be the levothyroxine or is it just a coincidence? I'm thinking I may have to go back to taking my medication on a morning. I take 50mg.