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Iron Poisoning
Iron Poisoning Overview
Iron poisoning occurs when a person, usually a child, swallows a large number of iron-containing pills, most often vitamins.
Acute iron poisoning mainly involves children younger than 6 years who swallow pediatric or adult vitamins containing iron. These children may not be able or willing to tell you what and how much they swallowed.
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Iron salt is available in multiple preparations. For instance, ferrous sulfate is available as drops, syrup, elixir, capsules, and tablets.
Iron preparations are widely used and are available without a prescription and may be housed in bottles with or without child resistant closures.
- The amount of iron that will cause poisoning depends upon the size of the child. An 8-year-old may show no symptoms from an amount that would cause serious symptoms in a 3-year-old. Symptoms appear at doses greater than 10 mg/kg (based on the body weight of the child).
- Iron is available in different oral forms.
- A child may show no symptoms after eating a number of pills that might have looked like candy. The only evidence may be an opened vitamin bottle. If you know, or even suspect, that a child has eaten tablets, you should consult a hospital’s emergency department or a poison control center regarding a possible iron poisoning.
Iron Poisoning Causes
- Iron pills, especially children’s multivitamin tablets, can look like candy to children.
- Intentional overdose can occur among adults, but is rare.
Iron Poisoning Symptoms
Symptoms of iron poisoning usually become evident within 6 hours after an excessive amount of iron is swallowed.
- Iron corrodes your intestinal lining and is a direct irritant to the stomach.
- People with iron poisoning can have the following symptoms:
- Severe vomiting
- Diarrhea
- Abdominal pain
- Dehydration and lethargy if not treated adequately
- A child’s vomit or stool may be bloody.
- Often, after supportive care, the gastrointestinal symptoms appear to improve 6-24 hours after their onset.
- If profound poisoning is inadequately treated, shock and death can occur.
- The amount of iron ingested may give a clue to potential toxicity. The therapeutic dose for iron deficiency anemia is 3-6 mg/kg/day. Toxic effects begin to occur at doses above 10-20 mg/kg of elemental iron. Ingestions of more than 50 mg/kg of elemental iron are associated with severe toxicity.
- A 325-mg tablet of ferrous sulfate has 65 mg (20%) of elemental iron
- A 325-mg tablet of ferrous gluconate has 39 mg (12%) of elemental iron
- A 325-mg tablet of ferrous fumarate has 107.25 mg (33%) of elemental iron
WebMD Medical Reference from eMedicineHealth
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