I hate the prep also, but the prep i took was an 8oz bottle you mixed in a 12 or 16 oc cup. Wish i could remember the name. you follow it up by drinking 2 more full cups of plain water within 45 minutes. all this is from memory. Anyway seems like you do it again the following morning . I did the same prep b4 my colonoscopy as i did the night b4 my surgery. Im sure your doctor will know the name of it. Please dont put this off. My colon was clean but the cancer in my rectum was so large they barely got the probe through my rectum into my colon. I went through radiation and chemo every week day for a month to try and shrink the tumor. 6 weeks later i had my surgeries. That was nov 20 2013. They first removed a small bellon button tumor i had. Then because they were there, i suppose, they removed my appendix. Then then started with the cancer in my rectum. when they got my margins clear, because they kept checking and removing more tissue til it was, I had no sphincter muscle left. They took my entire rectum out , so then thet had to do a colostimy on me. Two days later my surgeon came and told me that my pathologist results couldnt have been any better. My margins were all clear ,and my lymph nodes were clear. I am not quite over this as i am still doing chemo treatments just as a precation because they shrank the tumor b4 they removed it. I have 10 weeks to go with this chemo.After 7 mos, i finally returned to work. It feels great. And trust me this ostimy bag is no big deal. I feel better now than i did a year ago. I carry a small backpack with a change of clothes and ostimy supplies with me whever i go. I usally have this in my car. At work i have an ostimy kit and a change of clothes there. I have never needed the clothes but i am always prepared. It's just part of my life now. My surgeon told me if i hadnt of went in i woulda prolly had 2 years top to live. And with a few weeks the cancer would have been in my lymph nodes, then its just a matter of time, with chemo the rest of your life. So i really consider my self lucky in a way. The most humbling thing I have ever seen is small children alot worse than me.Never had a chance to experience life. If I can help anyone with this, feel free to pm me. For some reason its a whole lot easier talking to someone who has/had cancer. You get past all that sympathy stuff. My surgeon had a very direct and honest attitude. Warned me of all the possible outcomes, and I was prepared for the worst. He didnt sugarcoat anything. I personally liked that.