A child presents with drowsiness, reduced deep tendon reflexes, and seizures. On examination, a blue line is visible on the gums, and there is a history of constipation. Which medication is the most suitable treatment for this child?

Explanation

The presence of a blue line on the gums along with neurological symptoms and constipation suggests lead poisoning. EDTA is the chelating agent of choice for treating lead toxicity, as it effectively binds lead for excretion. Other agents like DMSA, BAL, and Penicillamine are also chelators but are less preferred in this scenario.