Dulcolax Suppository contains 10 mg of bisacodyl to quickly relieve occasional constipation and irregularity. Dulcolax is the #1 doctor recommended laxative brand. One suppository produces a bowel movement in as soon as 15 minutes. The comfort shape is tapered, making it easy to insert. Each bisacodyl suppository is individually wrapped. Please note, Dulcolax laxative suppositories are designed for rectal use only and should not be taken orally.