I was diagnosed with an under active thyroid 3 weeks ago and was given 50 micrograms of Levothyroxine for the first 4 days until the GP said I had been given too low a dose and upped it to 100 micrograms of Levothyroxine daily. I am still getting really bad leg cramps and muscle soreness. I went back to the GP 2 days ago and have now given me muscle relaxants which have helped a little bit - is this just masking the problem? Why am I still getting the pains?
My TSH level was 17.88 ('normal' range 0.27-4.20)
Free T4 was 6.