Final answer:
The best action for the nurse is to contact the prescriber to discuss the risk associated with subcutaneous administration of antiemetics to a patient with hemophilia and potentially alter the MAR.
Step-by-step explanation:
The nurse reviewing the medication administration record (MAR) of a patient with hemophilia notes that both oral and subcutaneous (under the skin) options are available for a PRN antiemetic (as needed medication for nausea). Given the patient's condition, subcutaneous injections may pose a higher risk for bleeding. Therefore, the best action for the nurse would be to contact the prescriber to clarify and potentially modify the administration route of the antiemetic. The nurse should ensure any changes are made with a full understanding of the patient's current status and needs. It is critical for the nurse to collaborate with the care team, ensure that all procedures are followed, and reassess the patient's symptoms as needed.