网页You will need to buy the following from the drug store or pharmacy: − Dulcolax® (bisacodyl) 5 mg tablets. − MiraLAX® (polyethylene glycol 3350) 8.3 oz. − Gatorade® 64 oz. that is not red, purple, or orange. . If you have diabetes, see the “Prepare for your Colonoscopy: MiraLAX® and Dulcolax® Patients with Diabetes” sheet.