It depends on what you have to take to 'clean you out'. I had to drink a gallon of this elixer. ..It was the worst part of the whole thing. I was gagging that stuff down by the end. They said they could keep me awake and let me know what they were doing and I said, no way!!! If I had the choice, I didn't want to have any memory of the procedure. They obliged. I woke up and my DH drove me home. I was a little sleepy when I got home, but all in all, I was ok.