<unk>  is a supplement used to prevent iron deficiency and<unk> <unk>  deficiency during pregnancy. It can also be used to treat iron deficiency anemia. It is a fixed dose combination of<unk> <unk>  and<unk> <unk> . It is taken by mouth. Side effects may include dark stools, constipation, and abdominal pain. Caution is advised in people with hemochromatosis. Excessive use in children can cause serious problems.<unk>  was approved for medical use in the United States as early as 1946. It is on the World Health Organization's List of Essential Medicines. It is not currently commercially available as a combination in the United States.
Ferrous salt/folic acid
Iron sucrose
Zinc sulfate 
Boron trichloride
Zinc pyrithione
Multiple micronutrient powder
Zinc oxide
Metadoxine