Pentobarbital will decrease the level or effect of fostemsavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated. pentobarbital will decrease the level or effect of vincristine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of tolterodine by affecting hepatic/intestinal enzym... https://trentonjbtjb.wikigiogio.com/1702962/het_feit_over_nembutal_bijwerkingen_dat_niemand_voorstelt