Saline laxatives are primarily used to treat occasional constipation. Certain medications in this class can also be used to relieve heartburn and indigestion. These medications work for constipation by drawing water into your intestines, which helps to soften stool and stimulate bowel movements. Saline laxatives come in different forms, including oral solutions and tablets, as well as rectal enemas. Examples include magnesium citrate (Citroma), magnesium hydroxide (Milk of Magnesia), and saline enemas (Fleet). You can choose the form that best fits your needs.