I recently had treatment for bronchitis including 5 days of Cortisone. My usual problems of swollen fingers disappeared with the treatment, which is normal considering my poly-arthritis in my fingers. However the other major problem that I have had for years -insomnia- Strange as it may seem disappeared also. I'm now sleeping better than I have done for many years. I'm now retired, very little stress. As I have Hashimoto's condition (underactive thyroid) I'm taking a T4+T3 each day. Can anyone explain if there is a link between the cortisone treatment and the disappearance of my insomnia. Could it be that the cortisone treatment has corrected/adressed an longstanding adrenal problem?