The standing orders for a patient include acetaminophen 650 mg every 4 hours prn for headache. After assessing the patient, the nurse identifies the need for headache relief and determines that the patient has not had acetaminophen in the past 4 hours. Which action will the nurse take next?

The correct answer is D: Administer the acetaminophen. The nurse should administer the acetaminophen since the patient is due for the medication based on the standing orders and assessment findings. Administering the medication promptly ensures timely relief for the patient's headache. Option A is incorrect because the nurse should administer medications themselves when it involves assessing the patient's response. Option B is incorrect because pain assessment should be done before administering medication to ensure appropriateness. Option C is incorrect as notifying the healthcare provider for a verbal order would cause unnecessary delay in providing relief.