Yesterday I saw an endocrinologist at the hospital. I had been feeling very tired T4 had been slowly going down and I have been having lots of aches and pains. My G P had put up my Thyroxine to 125 and I do feel quite a bit better. Been on higher dose for about 6 weeks. At the end of the consultation the endo said she would like to do a test to rule out Addisons as my Sodium level was a bit on the low side. This test entails having an injection of something which will make them able to measure cortisol levels. As I am very sensitive to most things put into my system I feel apprehensive about this test. I have looked up Addisons and don't appear to have any symptoms . Anyone on here who is familiar with this issue I would be grateful for your input.