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​Differential Diagnosis of Metabolic Acidosis with Normal Anion Gap ( Hyperchloremic Acidosis) 
• Ureterosigmoidostomy
• Renal tubular acidosis (including acidosis of aldosterone deficiency)
• Intestinal loss of HCO3 (diarrhea, pancreatic fistula)
• Ingestion of exogenous acids (ammonium chloride, methionine, cystine, calcium chloride)
• Ileostomy
• Drugs: amiloride, triamterene, spironolactone, β-blockers
• Dilutional acidosis (as a result of rapid infusion of bicarbonatefree isotonic saline)
• Carbonic anhydrase inhibitors (e.g., acetazolamide)
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