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Table 146-3

Causes of Acute Interstitial Nephritis

Drugs (70%, antibiotics in one-third)
 Antibiotics
  Methicillin, nafcillin, oxacillin
  Rifampin
  Penicillins, cephalosporins
  Ciprofloxacin
  Sulfamethoxazole and other sulfonamides
 Proton pump inhibitors, e.g., omeprazole
 H2 blockers, e.g., cimetidine
 Allopurinol
 5-Aminosalicylates

 NSAIDs, including COX-2 inhibitors

 Immune checkpoint inhibitors (e.g., nivolumab)

Infections (16%)
 Leptospirosis, Legionella, streptococcal, tuberculosis
Tubulointerstitial nephritis and uveitis syndrome (TINU) (5%)
Idiopathic (8%)
Sarcoidosis (1%)
IgG4-related systemic disease

Abbreviation: COX-2, cyclooxygenase 2.