fosphenytoin will reduce the extent or effect of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check.conivaptan will improve the degree or outcome of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check.Utilization of benzodiazepines, including diazepam, each made use of by itself and