A 41-year-old male presents to your office with a complaint of epigastric pain for the past several months. He takes over-the-counter antacids, but symptoms have been worse over the past month. He denies any weight loss, vomiting, hematemesis, or melena. The discomfort is worse after eating. Medical history is noncontributory. He takes no other medications. He smokes half a pack of cigarettes a day and drinks alcohol socially about once per week. Physical examination is unremarkable except for mild epigastric tenderness. What is the appropriate next step in managing this patient?