Problem: A 45-year-old patient presents with frequent heartburn, regurgitation of stomach contents, and a sour taste in the mouth. Symptoms worsen when lying down and are relieved by antacids. On examination, there are no alarming features. Which of the following is the most appropriate initial step in the management of this patient's symptoms?
O Order an upper endoscopy to assess for complications of GERD.
O Recommend lifestyle modifications, including dietary changes and elevation of the head of the bed.
O Prescribe a proton pump inhibitor (PPI) for immediate symptom relief.
O Perform a barium swallow study to evaluate esophageal motility.