pentobarbital will lessen the level or influence of ethotoin by affecting hepatic enzyme CYP2C9/ten metabolism. Use Warning/Monitor.pentobarbital will reduce the level or effect of elbasvir/grazoprevir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. The therapeutic outcome of elbasvir/grazoprevir may very well be lowere