dragoon - a member of a European military unit formerly composed of heavily armed cavalrymen. 1  cavalryman, trooper - a soldier mounted on horseback; a cavalryman always takes good care of his mount.
However, milder products (e.g., stool softeners, bulk-forming laxatives) should be used whenever possible for constipation. Magnesium citrate is a saline laxative that is thought to work by increasing fluid in the small intestine. It usually results in a bowel movement within 30 minutes to 3 hours.
Magnesium sulfate taken orally should produce a bowel movement within 30 minutes to 6 hours. Drink plenty of liquids while you are taking magnesium sulfate. If you have rectal bleeding or if you do not have a bowel movement after using magnesium sulfate as a laxative, stop using the medication and call your doctor at once.