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“ Quinidine almost completely inhibited the CYP2D6-mediated de-esterification at the concentration of 1 x 10(-6) M. Ketoconazole and troleandomycin inhibited the CYP3A4-mediated reaction in a dose-related manner.”
Drug metabolism and disposition: the biological fate of chemicals • 1999 | View Paper
“The addition of quinidine , a selective inhibitor of CYP2D6, along with triacetyloleandomycin and sulphaphenazole produced an additional decrease in the rate of NT formation in all but the PM liver, but did not completely eliminate the reaction.”