A few years ago tried triiodothyronine (T3), at doses of around 5 to 20 mcg daily.
Looking back at my medication notes diary from 2012, I see that after around two weeks of taking T3 in daily doses ranging from 10 to 20 mcg, I suddenly began a two month period of frenetic energy and motivation, where I found myself working much, much harder than normal on various projects and activities.
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I am not hypothyroid, since I was tested for this.
I will guarantee 100% that your thyroid was not fully tested and that if T3 works for you then you are, indeed, hypothyroid.
You need to go back to your doctor with a written list and ask for the following tests:
TSH, FT3, FT4, Vit D, Vit b12, iron, folate, ferritin, thyroid antibodies. You are not interested in your doctors opinion of what is normal. FT3 and FT4 need to be high in range for those who are symptomatic - as you are. It is common for hypo people to be deficient in VitD, B12, iron, folate and ferritin - and all need to be well in range, not just bottom.
Then head over to Genova UK and order the saliva cortisol test. This is the important one for those diagnosed with ME/CFS. I have been ill for nearly 40 years. Dismissed by the medical profession and refused any testing.
Yet the clues are there, and they know it.
For the majority of people diagnosed with ME, the cause is multifaceted endocrine disorders. It's complicated - which is why doctors hate it. What works for one doesn't for another - doctors hate that too. They prefer one pill fits all, and talking to a patient about what improves them adn what makes them worse is anathema to them.
I promise you that you and virtually everyone else on this forum can improve. The clues are in the testing - contrary to what your doctor will have told you.
Improvement takes, time, thought, work. It's a rocky road. I've been doing it for 2 years and I cannot tell you how I've improved.
There is no magic pill, there is no magic test, there is no magic expensive treatment. Mainstream medicine has the tests you need and the treatments you need. The only bar has to be drug companies.
For example. Treatment with T3 at 50mcg per day costs the NHS £4k. Yes, four thousand pounds. The same treatment can be purchased over the counter in Europe for around 1 Euro a week. Treatment that will help improve many patients - who would then not need, painkillers, statins, stomach meds, etc, etc.