Q. A 58-year-old woman presents to the gastroenterology clinic with a 6-month history of worsening heartburn and regurgitation, especially after spicy meals. She reports that she has tried over-the-counter antacids with minimal relief. Lately, she has also noticed difficulty swallowing solid foods. On physical examination, the physician found no abdominal tenderness or organomegaly. Upper endoscopy reveals a hiatal hernia and evidence of esophagitis. Her lab investigations are normal. What is the most appropriate next step in the management of this patient?