Does Vasculitis Causes Sleeplessness?

MY QUESTION IS ;; IAM ON PREDISONE 15.5 MG DAILY NOW IVE BEEN PUT ON MYCOPHENOLATE 500 MG 2 TIMES A DAY DUE TO VASULARITIS WHICH I DEVELOPED THIS Past 6 month came up with the boils of purple all over my body so the predisone which I was on 60 mg and am now down to 15 mg a day ---my question is this new medication work well with the predisone and will it replace predisone in time so I can get off of thepredisone ???also don't sleep at nights and haven't since i got Vascularitis is one of these keeping me awake??? thank you sorry such a long inquiry