Okay everyone speaks about the drinking part of the prep and that is not great but for me there was another issue. I have very sensitive skin so my bottom gets very sore once the prep starts to work. That for me is almost worse than just drinking the prep. So what I do is to get some zinc oxide and coat my anal passage with that to protect the skin. I have passed that tip on to many others who undergo the same procedure and they "thank me" No one talks about that part of the colonoscopy but want to pass that on to you and to whomever else might be reading this post.