Pentobarbital will decrease the level or effect of alfentanil 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 decreases effects of sufentanil SL by affecting hepatic/intestinal enzyme CYP3A4... https://icelisting.com/story21476680/considerazioni-da-sapere-su-soluzione-orale-di-nembutal