NCIt definition : The sodium salt of acetazolamide, a nonbacteriostatic sulfonamide derivative with
diuretic and anticonvulsant properties. Acetazolamide is a potent inhibitor of carbonic
anhydrase that plays an important role in the control of fluid secretion. Inhibition
of this enzyme in the kidney results in a reduction in the availability of hydrogen
ions for active transport in the renal tubule lumen, thereby leading to increased
bicarbonate and cation excretion, and increased urinary volume. Reduced bicarbonate
level in circulation induces reduction of intraocular pressure via osmotic mechanism.
The anticonvulsant activity of acetazolamide may contribute to inhibition of carbonic
anhydrase in the CNS, which decreases carbon dioxide tension in the pulmonary alveoli,
thus increasing arterial oxygen tension.;