A nurse is reinforcing teaching with a newly licensed nurse about transcribing medication prescriptions. Which of the following prescriptions should the newly licensed nurse identify is an accurate transcription?

Rationale: A. Heparin 5000 U subcutaneous every 8 hr: Using "U" for units can be misread as zero, potentially causing a tenfold overdose. The correct transcription uses the full word "units" to prevent errors. B. M50, 10g PO delly: This prescription contains multiple errors: "M50" is unclear, "10g" may be excessive or incorrect dosing, and "delly" is an incorrect abbreviation for daily. This transcription is inaccurate and unsafe. C. Lorazepam 0.5 mg PO PRN at bedtime: Although mostly correct, "PRN at bedtime" can be confusing. It is clearer to specify "PRN for anxiety at bedtime" or "PRN as needed at bedtime" to clarify the indication and timing. D. Doxazosin 5 mg PO at bedtime: This transcription is clear, uses accepted abbreviations, specifies route and time, and includes no dangerous abbreviations, making it an accurate and safe prescription transcription.