The nurse is caring for a patient who has been diagnosed with peptic ulcer disease. For which complications should the nurse monitor?

Choice A reason: Upper GI bleeding is the most common and serious complication of peptic ulcer disease. It results from erosion of a blood vessel within the ulcer bed and can present with hematemesis, melena, or anemia. This condition requires immediate medical attention and may necessitate endoscopic intervention or surgery. Choice B reason: Dyspepsia refers to indigestion and is a symptom rather than a complication. While common in peptic ulcer disease, it does not represent a life-threatening or structural complication that requires acute monitoring. Choice C reason: Gastric cancer is a rare but possible long-term consequence of chronic Helicobacter pylori infection and atrophic gastritis, which are associated with peptic ulcer disease. However, it is not an immediate complication and is less common than bleeding or perforation. Choice D reason: Large bowel obstruction is unrelated to peptic ulcer disease. PUD affects the stomach and proximal duodenum, not the colon. Obstruction in PUD typically involves gastric outlet obstruction due to scarring or edema, not the large bowel.