Enzym induktorer Stoffer, som er CYP3A4 induktorer, som rifampicin, carbamazepin, barbiturater og prikbladet perikum (Hypericum perforatum), vil sandsynligvis nedsætte plasmakoncentrationen af darifenacin.
Enzyme inducers Substances that are inducers of CYP3A4, such as rifampicin, carbamazepine, barbiturates and St John´s wort (Hypericum perforatum) are likely to decrease the plasma concentrations of darifenacin.