pentobarbital will decrease the extent or result of theophylline by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of.pentobarbital will lower the extent or influence of ethotoin by impacting hepatic enzyme CYP2C9/ten metabolism. Use Caution/Monitor.pentobarbital will lessen the level or result of voriconazole by affe