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 rationale Withholding the dose is the safest action to avoid potential overdose or toxicity. Digoxin has a narrow therapeutic window, and administering an additional dose without knowing how much was absorbed could lead to dangerous side effects. Choice B rationale Administering a half dose now is not recommended because it is unclear how much of the original dose was absorbed. This could result in either an insufficient dose or an overdose, leading to ineffective treatment or potential toxicity. Choice C rationale Giving another dose is not safe because there is a risk of overdosing the infant. Digoxin toxicity can cause serious complications, and it is crucial to avoid administering more medication until the next scheduled dose. Choice D rationale Mixing the next dose with food is not appropriate because it does not address the immediate concern of potential overdose. The priority is to withhold the dose and monitor the infant's condition.