<unk> is used medically as a dietary supplement. Specifically it is used to treat<unk>  deficiency and to prevent the condition in those at high risk. This includes use together with oral rehydration therapy for children who have diarrhea. General use is not recommended. It may be taken by mouth or by injection into a vein. Side effects may include abdominal pain, vomiting, headache, and feeling tired. While normal doses are deemed safe in pregnancy and breastfeeding, the safety of larger doses is unclear. Greater care should be taken in those with kidney problems.<unk>  is an essential mineral in people as well as other animals. The medical use of<unk> began as early as the 1600s. It is on the World Health Organization's List of Essential Medicines.<unk> is available as a generic medication and over the counter.
Zinc sulfate 
Iron sucrose
Zinc oxide
Zinc pyrithione
Penicilloic acid
Silver diammine fluoride
Potassium fluoride
Boron trichloride