Pentobarbital will decrease the level or effect of vinblastine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. Per some countries, it is legally used in assisted suicide or euthanasia under strict medical regulations. pentobarbital will decrease the level or effect of levonorgestrel oral/ethinylestradiol/ferrous bisglycinate by affecting hepatic/i... https://travialist.com/story10600690/non-ci-sono-altre-pentobarbital-hond-un-mistero