pentobarbital will lessen the level or impact of gefitinib by impacting hepatic/intestinal enzyme CYP3A4 metabolism.pentobarbital will minimize the extent or effect of aripiprazole by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.fentanyl transmucosal and pentobarbital both raise sedation. Stay away from or Use Altern