Final answer:
The most appropriate action for the nurse would be to write down the order and document it as a telephone order. Verbal orders should be properly documented to ensure accuracy and accountability.
Step-by-step explanation:
The most appropriate action for the nurse in this situation would be to write down the order and document it as a telephone order.
Verbal orders are common in healthcare settings, but it is important to properly document them to ensure accuracy and accountability. Writing down the order and documenting it as a telephone order allows for proper record-keeping and serves as a legal documentation of the physician's order.
Additionally, it is crucial for the nurse to prioritize patient care and administer the pain medication in a timely manner, as prescribed by the physician.