Pentobarbital will decrease the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of quinine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of abiraterone by affecting hepatic/intestin... https://yoursocialpeople.com/story5725646/tutto-ci%C3%B2-che-riguarda-what-is-nembutal-pentobarbital