pentobarbital will reduce the extent or effect of voriconazole by impacting hepatic enzyme CYP2C9/ten metabolism. Small/Importance Unknown.pentobarbital will lessen the extent or impact of cinacalcet by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on.pentobarbital will decrease the level or impact of dexamethasone