<prompt> Which of the following drug is not metabolized by acetylation?IsoniazidHydralazinePhenytoinProcainamide  <response>: Metabolism by acetylation: Two types of individuals are found, slow and fast acetylators. -Acetylation is done by N acetyl transferase enzyme. Drugs metabolised by acetylation Sulfonamide Hydralazine Isoniazid Procainamide These drugs can cause SLE. 