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Title: N-Hydroxyamide metabolites of lidocaine. Synthesis, characterization, quantitation, and mutagenic potential. Author: Nelson SD, Nelson WL, Trager WF. Journal: J Med Chem; 1978 Aug; 21(8):721-5. PubMed ID: 690997. Abstract: Two possible N-hydroxyamide metabolites of lidocaine were synthesized and characterized. A combined technique utilizing chemical-ionization mass spectrometry and stable isotope labeling demonstrated that these potentially carcinogenic N-hydroxyamides were neither present in human urine after oral lidocaine administration nor during intravenous infusion of lidocaine for the treatment of ventricular arrhythmias. However, small amounts of 2,6-dimethylphenylhydroxylamine were detected in the urine of all subjects. Mutagenesis assays using the Ames test showed that neither the N-hydroxyamides nor the N-hydroxyarylamine produced revertant colonies above background levels using the Salmonella tester strain TA-1538.[Abstract] [Full Text] [Related] [New Search]