pentobarbital will lessen the extent or impact of voriconazole by affecting hepatic enzyme CYP2C9/ten metabolism. Minimal/Importance Not known.pentobarbital will minimize the extent or outcome of norgestrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Keep track of Closely. Moderate CYP3A4 inducers might reduce progestin