That's one of the drugs I'm afraid of. I'm not very familiar with it, but from what I understand it's eliminates cortisol in the body, but this also severly limits the body's inflammatory response as well as its ability to recognize and act upon sudden trauma.
I believe this is what was blamed for the death of Andreas Munzer. He had a bleeding ulcer and due to his extended use of cytadren, he basically bled out. Of course this is just through the rumor mill.