Citric acid / magnesium oxide / sodium picosulfate
"I followed the directions my DR. gave me - 1 packet at 5 with 5 8oz glasses of clear liquid to drink in 2 hours after that.  Started going within an hour.  Took the 2nd packet at 10:00 and have been in the bathroom a lot.  No doubt I will be totally clear by the AM.  This is great.    I had $40 coupon for the product from the DR so cost wasn't bad at all.  Will use the product again the next time."