Fleet Adult Glycerin Suppository now formulated with Aloe is a convenient alternative for those who prefer not to use liquid . The suppository is easily inserted rectally, allowing it to act locally in the colon without having to go through the entire digestive system. #1 Doctor-recommended glycerin works by attracting water into the stool to promote a bowel movement. Fleet Adult Glycerin Suppository promotes a bowel movement within 15 Minutes to 1 Hour. Before using Fleet Glycerin Suppositories, be sure to review the complete labeling.