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Furosemide is a diuretic which is an anthranilic acid derivative. Furosemide tablets, USP for oral administration contain furosemide, USP as the active ingredient and the following inactive ingredients: corn starch, lactose monohydrate, magnesium stearate, pregelatinized starch, and sodium starch glycolate. Chemically, it is 4-chloro-N-furfuryl-5-sulfamoylanthranilic acid. Furosemide, USP is available as white to off white round tablets for oral administration in dosage strengths of 20, 40 and 80 mg. Furosemide, USP is a white to slightly yellow odorless crystalline powder. It is practically insoluble in water, soluble in 15 parts of acetone, freely soluble in dimethylformamide and in solution of alkali hydroxides; soluble in methanol; sparingly soluble in alcohol; very slightly soluble in chloroform.