Does lowering Synthroid cause you to be tired.

[lsroesch]

I have been on Synthroid (Levothyroxine) for the past 16 years. The past few months, I have felt very tired. The doctor first changed my medication from 120 mcgs to 112 mcgs I complained about being more tired and she changed it to 100 mcgs. I went in a few days ago and she changed it to 88 mcgs because I was still complaining about being tired. Today, I am so tired I can hardly function. I feel run down and sluggish. I would think being tired you would increase dosage, I am so confused about this. Anyone have any ideas?

[gimel]

Surely your doctor was not changing your meds purely based on your symptoms of being tired, without any blood tests.  Also, in view of your symptoms,reducing meds would not make sense.  I must be missing something here.  Please post whatever thyroid test results and reference ranges you have, so that members can provide the best response.

[lsroesch]

The only test results I have are from April 9, 2009. I'm sure there were more tests taken since, but at this moment I don't have them.
My T4 was 1.2 and the TSH was .56 at that time. I will try to find out what the other numbers were since then. The doctor did say something about my thyroid being too theraputic (what ever that means) and that was another reason she changed it.

[magpieannie]

What dose of meds were you on in April when this lab was taken? I have no idea what too theraputic means??? If you are tired it is probably because you are now being undermedicated. She should not have decreased your meds by so much in my opinion? Especially without  looking at blood work! I think I'd seriously consider finding a new doctor before you get sicker!