Get our free Nulytely coupon and be eligible to receive a discount. You can reduce your Nulytely cost by up to 75% with our free Nulytely discount card. Bring it to a participating pharmacy near you to save on your prescription medication.Polyethylene glycol electrolyte solution is a laxative solution that increases the amount of water in the intestinal tract to stimulate bowel movements. This medication also contains potassium, sodium, and other minerals to replace electrolytes that are passed from the body in the stool. Polyethylene glycol electrolyte solution is used to clean the bowel before colonoscopy, a barium x-ray, or other intestinal procedures. Polyethylene glycol electrolyte solution may also be used for purposes not listed in this medication guide.