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. Frequency is clearly stated as every 12 hours, which is a common dosing interval for ondansetron. There is no need to clarify this part of the prescription. B. Route is specified as by mouth, which is an appropriate and common route of administration for ondansetron. This part of the prescription does not require clarification. C. Dose is specified as 8 mg, which is within the typical dosing range for ondansetron. There is no need to clarify this part of the prescription. D. Reason is not specified in the prescription. PRN (as needed) medications should include the specific indication for use to ensure safe and appropriate administration. The nurse should clarify with the provider under what circumstances the ondansetron should be given, such as for nausea or vomiting.