I have been on eltroxin 50mcg for five months. I felt an effect within days of taking it. My stamina improved and I felt I had come out of a coma. However the physical tiredness has lingered. I have aches and pains in my hands and feet on the last three months and am having lots of trouble with constipation. I also have carpal tunnel syndrone which improved initially but is now coming back. My gp said as I am in range now tsh from 5.6 to 2.4 that is all I need.Can it take this long to work?