pentobarbital will minimize the extent or effect of ethotoin by impacting hepatic enzyme CYP2C9/ten metabolism. Use Caution/Keep an eye on.pentobarbital will lower the level or result of elbasvir/grazoprevir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. The therapeutic impact of elbasvir/grazoprevir could be decreased i