[Biotransformation and pharmacokinetics of bamipine in rats. 1. biotransformation].

Biotransformation and Pharmacokinetics of Bamipine in Rats/1st Communication: Biotransformation studies. The metabolism of the antihistaminic N-phenyl-N-benzyl-4-amino-1-methylpiperidine (bamipine) was investigated after oral application in Wistar rats. The major metabolites in the urine were the ether glucuronides of N-p-hydroxy-phenyl-N-benzyl-4-amino-1-methylpiperidine and of N-p-hydroxyphenyl-N-benzyl-4-amino-piperidine. Unchanged drug was not detected. In vitro studies showed, in good correlation with in vivo studies, a oxidative demethylation of bamipin.