Pentobarbital will decrease the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of amiodarone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. pentobarbital will decrease the level or effect of exemestane by affecting hepatic/intestinal enz... https://iwanttobookmark.com/story20427447/pentobarbital-vs-phenobarbital-una-panoramica