Pharmaceutical Quiz 131

By Anonymous -



IUPAC Name: N-(5-sulfamoyl-1,3,4-thiadiazol-2-yl)acetamide

Acetazolamide (sold under the trade name Diamox among others) is a sulfonamide derivative with diuretic, antiglaucoma, and anticonvulsant properties. Acetazolamide is a non-competitive inhibitor of carbonic anhydrase, an enzyme found in cells in the proximal tube of the kidney, the eye, and glial cells. Inhibition of this enzyme in the kidney prevents excretion of hydrogen, leading to increased bicarbonate and cation excretion and increased urinary volume, which results in an alkaline diuresis. Acetazolamide reduces the concentration of bicarbonate, resulting in a decreased synthesis of aqueous humor in the eye, thereby lowering intraocular pressure. Although its mechanism of action is unknown, acetazolamide has anti-convulsant properties resulting from indirect effects secondary to metabolic acidosis or direct effects on neuronal transmission. Acetazolamide also produces respiratory stimulant effects in response to changes to both carbon dioxide and oxygen tension levels within the lungs.

The correct answer is D.
-Source National Center for Biotechnology Information. PubChem Database. Acetazolamide, CID=1986, https://pubchem.ncbi.nlm.nih.gov/compound/Acetazolamide(accessed on Sept. 16, 2019)

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