Carbonic anhydrase inhibitors (e.g., aceta zolamide) Ammonium chloride Cationic amino acids (e.g., lysine, arginine, and histidine) Posthypocapnic metabolic acidosis Dilutional acidosis (e.g., rapid administration of 0.9% saline) Hypoadrenocorticism ‡ Box 1-9 differential diagnoses for metaBolic acidosis 1 5.