Fleet Liquid Glycerin SuppositoriesFast-acting, gentle relief. Inserted rectally, allowing it to act locally in the colon without having to go through the entire digestive system. Hyperosmotic laxative that attracts water into the stool and promotes bowel movement. Faster delivery because there's no need to wait for the suppository to melt. Sodium-free. Each easy-to-use, disposable applicator produces a bowel movement within 15 minutes to an hour.