I have vasculitis (they have not discussed which one P anca pos mpo) and am being treated with prednisolone and mycophenalate (the mycophenalate is on hold at the moment due to high liver results) been told its not the mycophenalate causing the high levels though). I am just asking if anyone has low urine output- I have noticed that I only go to the toilet in the morning and only small amount- i then go through the day and find that when I go to bed (midnight) i realise I have not been all day. Again when I go only small amount. I know my kidney blood tests are checked and ok. I have asked my gp as I drink a lot all day and am thirsty. I am sweating profusely at the moment- soaked clothing everyday all day long. The vasculitis is not under control- i have lots of severe symptons. The gp has put it down to sweating but I am worried my kidneys are showing signs of a problem. There is so little urine produced each day I am quite worried.