IC50: 3.76 μM (CYP2D6)
Ki: 2.34 μM (CYP2D6)
The herb of lotus leaves is a commonly used traditional Chinese medicine with a wide range of pharmacological and physiological activities, particularly the reduction of the blood triglyceride and cholesterol levels. N-Nornuciferine strongly inhibits CYP2D6 activity but shows weak or no inhibition of the other four P450 isoenzymes (CYP2C19, CYP3A4, CYP2E1, CYP2C9). N-Nornuciferine competitively inhibits the CYP2D6-catalyzed dextromethorphan o-demethylation with apparent K i values of 2.34 μM.