Hi all. Long story short, when my info pack arrived for my colonoscopy it had a note saying painkiller isn't available, so i phoned the consultant and we switched to a ct colonography. I have that this afternoon, i was given picolax as i may be allerigic to something in the gastrografin. I had my first sachet yesterday morning and second around 3pm. How long until it wears off? Bowel movements had quitened down before bed but I've just had to get up twice to go. My stomach is rumbling a lot too, can i still have jelly in the morning before?