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 levonorgestrel oral/ethinylestradiol/ferrous bisg... https://nanobookmarking.com/story20215796/pentobarbital-vs-phenobarbital-una-panoramica