I was diagnosed with Hashimoto's around 18 years ago but kept on 50mcg of thyroxine for 4 years which left me very poorly. I went to see a private endocrinologist who put me on T3 and told me to gradually increase my T4 and for a few years I was on 150/175mcg T4 and 10mcg of T3. My TSH during this time was 0.05 and my T4 reading at the upper end of the range. I was taken off T3 about 3 years ago but found I was okay on 150mcg of T4 and my TSH was no different. I am now 54, nearly 55, and have gone through the menopause. On my last thyroid check my T4 was above the reference range so I was asked to reduce my thyroxine dose to 125mcg but, after testing 8 weeks later, my T4 had risen further and my TSH was the same. I've now been on 100 mcg since November and my recent test shows that my T4 is 22.9 and TSH is 0.01. I'm just wondering why this is happening when I am reducing my dose of thyroxine? I know that we possibly need less as we get older but I'm loathe to drop my dose any further which I fear is what I will be asked to do. I have been under a lot of stress over recent months and wonder if this could be affecting the results?
Any advice or suggestions would be most welcome.