Large amount of iron is corrosive to the gastric mucosa and leads to severe gastric irritation in the child, Immediate Effects: Nausea and vomiting, Diarrhea, Abdominal pain, After 6 to 12 hours: Melena, Hematemesis, Cyanosis, Vasomotor collapse, Coagulation defects, Hepatic injury, Lethargy and coma