pentobarbital will lessen the extent or outcome of indinavir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on.pentobarbital will lower the extent or influence of phenytoin by affecting hepatic enzyme CYP2C9/ten metabolism. Use Warning/Check.fentanyl transdermal and pentobarbital both increase sedation. Steer clea