I've been on imuran for about a month now and my gi told me to give it atleast 6 weeks for it to work. From what i've read its usually 8-12weeks for it to have full effect. But each day im having more and more cramps and pain in the spot above my belly button. This is the spot where i had pain when i went into the er and got diagnosed with crohns. I don't know how long my gi expects me to give this medication but if it gets worse i would think he would switch me. Anyone ever taken imuran and had issues like this and then the medicine started to finally work. My gi said if it didn't work it was on to remicaide. I just can't believe that the medication isn't working and all i have is mild crohns and just inflammation. The pain is terrible too. I was perscribed tramadol when i came home from the er but it was only for 30 days and it didn't do anything for me at all.