A 24-year-old female brings her 5-week-old son, who has a temperature of 103° F, to the emergency department. The neonate is admitted with a diagnosis of bacterial meningitis and the infant treated with an IV medication.
Three days later, the baby is refusing to suckle. He has been spitting-up frequently and sleeping longer than usual. You examine the 5-week old and notice that his skin seems to be very pale.
You discover that the baby has been given the wrong IV medication.
Which of the following medications administered in error most likely caused these findings in the neonate?