Thinking of stopping Imuran

If what you're taling now is working then I would strongly recommend not changing a thing. I wouldn't quit all of your uc medications, that's pretty reckless. As Uc is a chronic, lifetime illness that requires lifetime maintenance medications. Without medications there's a strong possibility that you'll flare. Uc is an autoimmune disorder (or at least an immune deficiency) and you're under constant attack from that immune system that causes inflammation and uc symptoms, your uc medications treat those symptoms but don't cure you. Uc is for life, it doesn't just go away.