Medication-induced esophagitis

Etiology: direct mucosal injury caused by prolonged contact with a certain drug
- Antibiotics (e.g., tetracycline, doxycycline, and clindamycin)
- Antiinflammatory drugs, NSAIDs, aspirin
- Bisphosphonates (e.g., alendronate)
- Others (e.g., potassium chloride, iron compounds, quinidine)
Diagnostics
- Endoscopy: punched-out ulcers, mild inflammatory changes of the surrounding mucosa
  - These lesions are typically found in areas of esophageal narrowing.