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.
Milk of magnesia should work the first time you take it. You can expect to have a bowel movement within six hours. Sometimes, this can occur in as little as half an hour. The nature and cause of your constipation may impact how long it takes for the treatment to work.