Among other reasons why it is not recommended to use steroids when you got sleep apnea, is that your blood becomes thicker with steroids, and oxygen delivery around the body might be difficulted. When you got sleep apnea, the oxygen delivery stops for good....hence it is a bad combination. I know many guys who cycle steroids and most probably got sleep apnea. So it is not recommended to run steroids with this condition, but you can. Why don't you get a CPAP machine?