pentobarbital will lower the level or result of diazepam by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check.iloperidone improves amounts of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of. Iloperidone is a time-dependent CYP3A inhibitor and should produce amplified plasma level