When the body does not get enough iron, it cannot produce the number of normal red blood cells needed to keep you in good health. This condition is called iron-deficiency anaemia. Ferrous Sulfate tablets are used for the prevention and treatment of iron-deficiency anaemia. Iron is a mineral that the body uses in the creation of haemoglobin, a component of red blood cells that carries oxygen. Iron is also used in myoglobin, which allows muscle cells to store oxygen.