pentobarbital will lessen the extent or influence of etravirine by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Monitor.pentobarbital will reduce the extent or outcome of elbasvir/grazoprevir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. The therapeutic effect of elbasvir/grazoprevir may be dimin… Read More