Pentobarbital will decrease the level or effect of ketoconazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unknown. pentobarbital will decrease the level or effect of fosamprenavir by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. pentobarbital will decrease the level or effect of saxagliptin by affecting hepatic/intestina... https://beaubsjap.wikififfi.com/1803607/i_acquista_nembutal_liquido_iniettabile_diaries