pentobarbital will decrease the extent or impact of darifenacin by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on.pentobarbital will reduce the level or impact of fentanyl by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Check Intently. Coadministration of fentanyl with CYP3A4 inducers coul… Read More