Pentobarbital will lower the level or influence of zaleplon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Small/Significance Unknown. pentobarbital will minimize the level or influence of clozapine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check. pentobarbital will minimize the level or impact of carbamazepine by affecting hepatic/intestinal enz... https://garretticsgx.blogacep.com/36247118/detailed-notes-on-what-kind-of-drug-is-nembutal