went to dr.s they did the synacthen test as she had a low dhea reading..whatever that means, i know its adrenal related...other tests hadnt come back, sodium one was 137 so we have to increase the salt loading, we may have to s an endocrinologist... so we start our journey... Gwen. Ivabradine seems to beholding the tachy in check at the moment (5mg x 2 daily) fludrocortisone seems to be making her tired... does anyone else get that. Gwen