Bisacodyl is used on a short-term basis to treat constipation as well as used to empty the bowels before surgery. This drug is a stimulant laxative that is used for treating the condition of constipation. It is also used to clean out the intestines before any bowel examination or surgery. This drug work by increasing the movement of the intestines that helps the stool to come out. The dosage of Bisacodyl is taken by mouth as directed by your doctor. The prescribed dose of this drug depends on your age, medical condition, and response to treatment.