Dulcolax suppositories 10mg is a medicated laxative to help relieve constipation and irregularity, for easier bowel movements. Dulcolax suppositories 10mg is a comfort shaped medicated suppository for rectal use to relieve occasional constipation and irregularity. It helps to produce a bowel movement in as little time as 15 minutes for dependable, fast relief. How do dulcolax suppositories work? Dulcolax suppositories 10mg contains the active ingredients, bisacodyl, which stimulates the muscles in the intestine to promote bowel activity. Drug safety update measures for stimulant laxatives. Stimulant laxatives should only be used if other laxatives bulk forming and osmotic are ineffective. Children younger than 12 years should not use stimulant laxatives without advice from a prescriber and clinical guidance should be followed.