pentobarbital will minimize the level or effect of nisoldipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.pentobarbital will reduce the level or outcome of conivaptan by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch.pentobarbital will lower the extent or impact of vincristine liposomal b