phenytoin will decrease the extent or outcome of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch.hydrocortisone will lower the extent or influence of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of.When will I come to feel superior? Diazepam will do the job quite imme