Just going to copy-paste my experience:

I had a much different experience. First, there was a restricted diet a week prior that was hard to eat around since I am vegan and the instructions were geared for non-vegans. Then a 4 day liquid-only diet. I had diarrhea for at least two days. The actual salty solution was very hard to stomach. And I used the bathroom so much that I felt extremely cold and ill, and almost didn't finish the gross salty solution because I didn't want to use the bathroom anymore or have to taste the solution and just wanted to go to sleep. I didn't have flavored prep, I know some people got gatorade by reading online, but fml my prep was hell and they found nothing, someone in the comments said theirs was 12 hours (?!). What the hell, and I had mine earlier this year too. I've had food poisoning 2 or 3 times but it was nothing like this.