Key takeaways
Suprep (sodium sulfate/potassium sulfate/magnesium sulfate) and bisacodyl (Dulcolax) are both used to help with bowel movements, but they work differently and are used for different purposes. Suprep is an osmotic laxative that requires a prescription and is used to clean out your colon before a colonoscopy. It usually involves taking two doses, spread out over two days. On the other hand, bisacodyl is a stimulant laxative available over-the-counter and is used for occasional constipation. It typically takes 6 to 12 hours to work and is taken once a day. Suprep can cause side effects like stomach discomfort and bloating, while bisacodyl may cause belly discomfort and cramps. Suprep is not recommended for people with kidney problems, whereas bisacodyl should not be taken with antacids or milk.
