Taken prednisone for 2 days (20 mg) and it has made me angry and depressed and awful. i'm not taking it anymore but when will it be out of my system?

36 hours after last : The time it takes your body to reach plasma blood levels is 2-4 hours. The time it takes your body to excrete the medication in your urine after the last dose can take anywhere from 24-36 hours. It is the best anti-inflammatory we have. Let your doctor know that you stopped it and can't tolerate it. It can affect your mood, but there may be a reason your doctor gave it to you.