I've just been diagnosed with Underactive thyroid and I have been taking Levothyroxine since Friday 2nd October.
I've noticed i'm feeling really tired and I was just wondering if this is common with these tablets or if it's just part of the underactive thyroid, or just coincidence as i do sometimes feel tired in the day time?

I've taken meds before that say on the leaflet "cause drowsiness" and they've made me yawn constantly but i'm not feeling that way on the levothyroxine, I just feel really tired and have heavy eyes.

Thank you xxx