I am having a lot of discomfort and the doctor's office suggested I start I using my cortisone enema's again. I've been using them for three days but I have a colonoscopy scheduled on Tuesday? Anyone know for sure if it is ok to use the cortisone right up to the night before the exam? I don't see why not but I just want to be sure. Thanks in advance. I would ask the doctor's office but alas today is saturday.