4. 3), så som protesase hæmmere (f. eks. ritonavir), ketoconazol og itraconazol.
CYP3A4 inhibitors Darifenacin should not be used together with potent CYP3A4 inhibitors (see section 4.3) such as protease inhibitors (e. g. ritonavir), ketoconazole and itraconazole.