pentobarbital will reduce the level or effect of propafenone by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Insignificant/Importance Not known.pentobarbital will enhance the stage or influence of clopidogrel by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor.Caution when discontinuing CYP3A4 inducers which mi