Review Question - QID 109923

A 37-year-old woman presents to the emergency department with pain in her face. She has experienced episodic and intense pain in her face that comes on suddenly and resolves on its own. She feels the pain over her cheek and near her eye. The pain is so severe it causes her eyes to tear up, and she is very self-conscious about the episodes. She fears going out in public and sometimes feels her symptoms come on when she thinks about an episode occurring while in public. While she is waiting in the emergency room her symptoms resolve. The patient has a medical history of diabetes, constipation, irritable bowel syndrome, and anxiety. She is well known to the emergency department for coming in with chief complaints that often do not have an organic etiology. Her temperature is 99.5°F (37.5°C), blood pressure is 177/108 mmHg, pulse is 90/min, respirations are 17/min, and oxygen saturation is 98% on room air. Cardiopulmonary and abdominal exams are within normal limits. Neurological exam reveals cranial nerves 2-12 as grossly intact. The patient's pupils are equal and reactive to light. Pain is elicited with palpation of the patient's face. Which of the following is the most appropriate initial step in management?