Constipation is a common condition, which impacts one in four Canadians Maintaining regular bowel movements is important in the peritoneal dialysis (PD) population because constipation can negatively impact the quality of dialysate flow and can result in impaired dialysis adequacy. Unfortunately, treating constipation is challenging in PD patients because of the diet and fluid restrictions required in this population, as well as the need for constipating calcium based phosphate binders.