pentobarbital will reduce the extent or impact of armodafinil by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Small/Importance Unfamiliar.pentobarbital will lower the extent or influence of tamoxifen by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.fentanyl transdermal and pentobarbital both raise sedation. … Read More