Hi i have had crohns for ten years now and going through a rough patch at the moment. It all flared up in February have had mri scan endless trips to hospital. I have now been put on Azathioprine just wondered if anyone else is on these and what experience have they had on them as they seem quite a strong drug. I am now going for a colonoscopy and biopsy never had this done before so quite nervous about this so any advice from anyone. One thing i have to say is all the wonderful care i have had from the nurses, doctors and all i have had contact with at the hospital and doctors.