Posted 3/17/2011 7:59 PM (GMT -6)
You can stop cold turkey. No need to taper like pred. I was on it for years and went off to be able to enter a clinical trial. They required I be off for 30 days so that could be how long it stays in your system.
Incidentally, after the trial ended, I never went back on azathioprine because while off it, the fatigue and 'haze' I felt all the time was gone. I hadn't realized how off it was making me feel after years of taking it.