Which antidote is used for iron toxicity?

Deferoxamine is the correct antidote for iron toxicity because it functions as a chelating agent that binds to excess iron in the bloodstream. This binding forms a complex that is then excreted through the kidneys, reducing the harmful effects of iron overload in the body. Conditions such as hemochromatosis (a disorder that causes the body to absorb too much iron) or acute iron poisoning, particularly in children who may ingest iron supplements, necessitate the use of deferoxamine to prevent organ damage and other serious health complications associated with iron toxicity.

Other options listed do not specifically target iron poisoning. Dimercaprol is primarily used for heavy metal toxicity involving lead, mercury, and arsenic. Crotalidae polyvalent is an antivenom for snake bites, particularly from rattlesnakes, but it does not address iron toxicity. Pyridoxine, or vitamin B6, is used in the treatment of certain conditions such as vitamin B6 deficiency and as an antidote for isoniazid overdose, but it plays no role in managing iron toxicity.