fosaprepitant will raise the level or outcome of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.iloperidone improves amounts of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe. Iloperidone is usually a time-dependent CYP3A inhibitor and should result in elevated plasma a