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?

A. Mixing the dose with food is not recommended as it might affect the absorption of the medication and does not address the immediate situation. B. Withholding the dose is appropriate because it is uncertain how much of the medication was absorbed. Administering another dose could lead to toxicity. C. Giving another dose without knowing how much was absorbed could cause an overdose. D. Administering a half dose now is not recommended because the exact amount absorbed is unknown, risking either underdose or overdose.