With the removal of cisapride from the U.S. market, practitioners have increasingly used other medications, such as metoclopramide, to treat gastroesophageal reflux in pediatric patients. We describe the case of a neonate who developed methemoglobinemia after receiving metoclopramide at doses slightly above the recommended age-appropriate dosage. Health care providers should be aware of this potentially serious side effect in young infants who receive this medication.

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