Unexplained Gastric Ulcer: Role of Cinacalcet.

Peptic ulcer disease (PUD) most commonly arises as a complication of Helicobacter pylori (H. pylori) or impaired mucosal defense mechanisms against acid exposure by medications such as non-steroidal anti-inflammatory drugs (NSAIDs). Hypercalcemia can present with peptic ulcer-related symptoms, and cinacalcet is an effective medical treatment for primary hyperparathyroidism (PHPT) for non-surgical candidates. We present a case of a 66-year-old male patient with a history of primary hypercalcemia as a result of hyperparathyroidism, on chronic cinacalcet, who was found to have gastric ulcers on endoscopy. After the reduction of the cinacalcet dose in one year, there was a complete resolution of inflammation in the gastric body.