OnePrep 1.38

The most difficult part of a colonoscopy seems to be emptying the bowel. You have to drink 2 to 4 liters of water mixed with medication, but for this health checkup, I chose a new drug called WonPrep 1.38. It costs an additional 50,000 won, but it is a medication that doesn't require the inconvenience of going to the bathroom from the night before. On the day of the exam, you only need to drink 1.38 liters over the course of an hour in the early morning.