Data on AEs were collected throughout the study by a patient’s responses to questions about his or her health, spontaneous reports, and clinically relevant changes and abnormalities observed by the investigator. These AEs were coded by using version 13.0 of the Medical Dictionary for Regulatory Activities. The severity and causal relationship of AEs to the bowel preparation were assessed by the investigator based on clinical judgment. AEs were recorded from the time of the procedure until the patient completed the study. A complete physical examination was conducted at screening, and a directed physical examination was performed at all subsequent study visits. Orthostatic vital sign measurements were collected at all study visits. Laboratory tests and electrocardiography were performed at all study visits with the exception of the randomization visit. A patient’s complete medical history was obtained at screening, and concomitant medication use was reported at multiple study visits.