SummaryDeprenyl metabolites were analyzed in various organs of rats after chronic oral treatment. The investigation was carried out by gas chromatography combined with MSD after derivatization of the metabolites. When (-)-deprenyl (selegiline) was administered to rats higher ratios of methamphetamine to amphetamine were found in the kidney, and the heart at 1 and 5 h after treatment, than after (+)-deprenyl administration. Both deprenyl and its demethylated metabolite were also detected; however, their level was generally lower than that of either methamphetamine or amphetamine. Coadministration of verapamil with selegiline did not essentially alter the major metabolic pathway of deprenyl metabolism.
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