My son is having this test at the end of the month, after they found he has a slightly low morning cortisol (135). They aren't really worried at all, but because he was feeling very unwell and had low blood pressure at the time, they are erring on the side of caution.
I queried with the nurse about side effects - I don't want him getting ill as he has been through enough lately - because when I had the same test a number of years ago, I became VERY unwell that evening. Nobody warned me about any side effects, and they said I would feel 'fantastic' all day, which I did! By the evening, every single part of my body began to ache, like the worst flu pains ever, and I could barely move. I had to go to bed, and was very late into work the next day.
The nurse basically said that she had never heard of any side effects of this sort in her 25+ years of testing people. She inferred I was lying, I felt.
Has anyone ever heard of such side effects following a short synacthen test before? Thank you.
(Mine was for similar symptoms, and I have subclinical, untreated hashimotos thyroiditis.)