Originally Posted by pray33
what does TSH level of .25 mean? I was treated for hyperthyroidism a year ago with redioactive iodine. Then became hypothyroid. I was treated with levoxyl and they finally got my levels at normal until recently I was not feeling so good and had another blood test and now am at .25 TSH. Is this normal to become hyperthyroid again? They are going to reduce my dosage of levoxyl. Why would I become hyperthyroid again?
The **** guidelines are: 0.3 < TSH < 3.0. You are on the edge of being hyper, so you should decrease your T4 dose. However, I would hope your doctor is also doing other tests (e.g. FT4) to judge where you are.
Reduction of thyroid output via drugs, or radioactivity, isn't an exact science. You should expect to have some variation in your remaining natural thyroid output for awhile. You might want to ask your doctor to do testing more often, though most of them don't want to do it more often than every 6 weeks or so.