I had one last year for my stomach. I was feeling really lousy and the hospital was in a rural area. They were so kind to me. I drank the liquid and then they told me I had to wait like 3-4 hours before the scan. They told me to go home and come back later. I lived one hour away so they took me to a patient's room that is used by the nurses and I was put to bed and covered with warm blankets. They woke me up later for the scan and then I went home. I was already ill, but the liquid I drank did not contribute to my discomfort. I think you will be fine, unless you have other problems which I did. Turned out I went off some medicine cold turkey, will never do that again !! This hospital gave me a drink which was like a milk shake and a big straw. The sensation makes you think you are wetting your pants, but it goes away quickly. As tests go, this is not a bad one. Just had a colonostmy today, that's another story !