A nurse is preparing to transcribe a prescription for a client that reads "ondansetron 8 mg by mouth every 12 hr PRN." Which of the following parts of the prescription should the nurse clarify with the provider?

A. The dose of 8 mg is appropriate for ondansetron and does not need clarification. B. The frequency of every 12 hours is acceptable for ondansetron and does not need clarification. C. The route of oral administration is correct for ondansetron and does not need clarification. D. The reason for prescribing ondansetron (usually for nausea and vomiting) should be clarified, as the prescription does not specify the indication.