Ferrous glycine sulphate.Iron supplements are dietary supplements containing iron that can be prescribed by a doctor for a medical reason, or purchased from a vitamin shop, drug store etc. They are primarily used to treat anemia or other iron deficiencies. There are three ways that it can be delivered: orally, intravenously or intramuscularly.The first iron pills were commonly known as blaud's pills, which were named after p. Blaud of beaucaire, the french physician who introduced and started the use of these medications as a treatment for patients with anemia.