Final answer:
The nurse should administer antinausea medication and postpone discharge teaching until the patient is more comfortable and able to focus, ensuring they understand the instructions properly.
Step-by-step explanation:
When a patient is nauseated and vomiting, it is important for the nurse to first address the patient's immediate comfort and needs. Therefore, the most appropriate action for the nurse would be option a, which is to administer antinausea medication and provide discharge teaching later when the patient is more comfortable and able to focus. Medications like zofran and phenergan can be prescribed to manage nausea effectively. Once the patient's symptoms are under control, the nurse can ensure that they understand the discharge instructions properly. It is important to ensure the teaching is clear and understood to facilitate recovery and prevent readmission.