pentobarbital will lessen the extent or influence of etravirine by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on.pentobarbital will lessen the extent or effect of elbasvir/grazoprevir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. The therapeutic result of elbasvir/grazoprevir may be