Hi, I have just obtained results of my latest blood tests from the doc's. And apparently I have miraculously disappearing hypothyroidism. My only theory is this is related to me ceasing anti-convulsant medication (Carbamazepine) while in hospital, but I'd like to run it past you all in case I might be missing something.
I was first spotted as having subclinical hypothyroidism in early March this year. I had a 'classic' TSH of 5.2 and free T4 of 10. Fast forward to early June, 3 months later, and I still have TSH of 4.8 and free T4 of 13. Slightly 'improved', I think?, but not that dissimilar. Three DAYS later I suddenly only have TSH of 1.9 and free T4 of 11. The free T4 looks much the same, but what has happened to my TSH? How can it possibly have dropped so drastically in 3 days when 3 months had seen little change?
I haven't yet spoken to my doc about this, but the receptionist said it was "normal" and I know he will consider that there is now not a problem.
During those 3 days I was in hospital with severe low sodium and they took me off Carbamazepine because it can cause low sodium, so they wanted to be sure it wasn't the true culprit and, of course, to try and get my sodium back up without interference. Carbamazepine is known to cause "dysfunctional thyroid test results" so I'm thinking this may mean my subclinical hypothyroidism has been entirely caused by my Carbamazepine usage. Or at least has obviously been aggravated by it.
Is this a safe assumption, or is it possible something else may have been at play? In hospital I only had antibiotics and saline - nothing that would affect thyroid, as far as I am aware.
Am I right, that this is a Carbamazepine related effect, or am I missing something here? Is this now truly a healthy thyroid result?
Any insights most gratefully received. I'm blundering around like a headless chicken here and I don't want my doc to just dismiss this result if something else may be afoot. Many thanks!