pentobarbital will lower the extent or outcome of diltiazem by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/keep track of. observe intently (one)pentobarbital will lower the level or influence of fentanyl transmucosal by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/check Closely. Coadministration