I was diagnosed 2 years ago with an under active thyroid.When I had my last blood test the doctor told me they had over prescribed so he reduced from 100 to 75.This has happened before. 8 weeks later i notice all my symptoms are back, Exhaustion,flaking nails , constipation, etc.......I mentioned this to doctor friend of mine whose response was, well of course you would like more it's like heroin makes you feel great !! Why do they rely on the test and not listen to how you feel. do others have this problem?