Identification and quantitation of hydrazine in the urine of patients treated with hydralazine

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Abstract
Hydrazine has been identified by gas chromatography-mass spectrometry in the 0- to 24-hr urine of patients administered hydralazine. With a specific gas chromatographic assay procedure, the amount of hydrazine in the 0- to 24-hr urine was determined in patients treated with various doses of hydralazine. The amount of hydrazine detected in the urine was greater in the slow acetylator phenotype than in the rapid acetylator phenotype. Studies indicated that hydrazine was not produced by chemical breakdown of hydralazine or its known metabolites in urine and therefore was unlikely to be a urinary artefact formed by chemical decomposition in the urine.