A recent study looks at the effectiveness of GoLytley vs MiraLax + 64oz of Gatorade. The main difference between the two products it that GoLytley includes the electrolytes you lose from the diarrhea induced from the bowel prep products. They both use the same active ingredient(Polyethylene glycol 3350). The results showed the GoLytley was a more effective bowel prep than MiraLAX + 64oz of Gatorade. Unfortunately it doesn’t seem like either of these products taste that great, but perhaps they do taste better than Phospho-Soda, which was taken off the market due to kidney damage concerns.
While GoLytley may have cleaned the bowel better, it appears that MiraLAX at least got higher rating as far as the patient experience goes.