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 meloxicam by affecting hepatic enzyme CYP2C9/10 metabolism. Minor/Significance Unknown. When barbiturates like Nembutal are abused, they are not usually the primary drug of abuse. Like https://hylistings.com/story21532943/pentobarbital-vs-phenobarbital-una-panoramica