A mother calls the nurse to report that at 0900 she administered an oral dose of digoxin to her 4-month-old infant, but at 0920 the baby vomited the medicine. Which instruction should the nurse provide to this mother?

Choice A: Administering a half dose now is not a safe instruction for the nurse to provide, as this can result in overdosing or underdosing the infant, depending on how much of the medicine was absorbed or expelled. This is a contraindicated choice.Choice B: Giving another dose is not a prudent instruction for the nurse to provide, as this can cause digoxin toxicity, which can be life-threatening for the infant. This is another contraindicated choice.Choice C: Mixing the next dose with food is not a relevant instruction for the nurse to provide, as this does not address the current situation and can affect the absorption and effectiveness of digoxin. This is a distractor choice.Choice D: Withholding this dose is a sensible instruction for the nurse to provide, as this can prevent adverse effects and allow the infant's serum digoxin level to be checked before giving another dose. Therefore, this is the correct choice.