Glycerin 4g Adult Suppositories 12'sGlycerin belongs to a class of drugs known as hyperosmotic laxatives. It works by drawing water into the intestines. This effect usually results in a bowel movement within 15 to 60 minutes. For adults, the normal frequency of bowel movements varies from once daily to 1 to 2 times weekly. For preschool aged children,the normal frequency of bowel movements varies from once daily to once every other day. Constipation is best treated by drinking plenty of