I am having horrible hair loss too. I always had thick, helthy hair. Now my pony tail is about half the diameter...I have to twist the hair band 3 times instead of 2 and it still slides off. And I barely have any bangs left at all.
My doctor said it doesn't matter, (in fact, he wouldn't even acknowledge it as a side effect) since my levels are now fine. Easy for HIM to say!!
I'm considering getting the thyroid surgery now, so I can get off methimozole, but I'm afraid what the side effects for the OTHER medicine will be. Since that's permenant, I don't want to take that step too soon...but I also don't want to go bald!