Milk of magnesia is an oral suspension that contains hydrated magnesium carbonate. It is an over-the-counter medication intended for occasional or short-term use as an antacid or laxative.

Milk of magnesia is an over-the-counter (OTC) treatment for constipation. It works by drawing water into the bowel and softening stool, making passing easier. It can also soothe indigestion and ...