Why does TSH levels go up even with treatment?

[Shells90]

I just got my lab test back after 6 months on levoxyl 50mcg. After the first month my levels went down to .9 and I felt good then I started putting on weight and tired hair loss nails brittle and I read up about the medication and changed to taking it 2 hours before getting up in the am to ensure nothing was messing with its absorption. Now I see my level is back up to where I started my dr increased the med to 75mcg. I will get my free t3 and t4 next time I think I just didn't mess with it since I felt so good after the first month and my level was below 1.

I understand that the tsh level fluctuates and doesn't really tell the story or reason for your thyroid issues but what makes it fluctuate? I did start on a cholesterol med since August but that was the only real change I thought that my tiredness and weight gain was due to my eating worse and not exercising, I know this is part of it, but now I am starting to see how when my thyroid is low I struggle for energy for the day, and then exercise and I go thru periods where the struggle wins and I just do the basics.

My labs are below:

ate TSH TSH Options
(uIU/mL)
Normal Range
0.45-4.67 (uIU/mL)
Normal Range
0.45-4.67
12/07/2009 3.15 Read Doctor's Annotation
07/14/2009 0.93 Read Doctor's Annotation
06/09/2009 3.08 Read Doctor's Annotation
12/03/2007 3.37 Read Doctor's Annotation
10/23/2001 4.18

[nonstickpam107]

Most of us here do not see doctors who try and regulate thyroid using a pituitary test (TSH is a test of the pituitary...not the thyroid). The TSH can go up and down all day long as much as three whole POINTS so it's senseless to treat using that as a guide.

So...it doesn't matter what your TSH is. You need tested for the actual thyroid hormones. If you can't find a doc to do that you can still get it yourself at Online Lab Tests: blood work, blood testing and laboratory tests use checkout discount code: 12345 under 90 dollars, some tuen it into their insurance and have it paid for.

Pam