Pentobarbital will reduce the extent or impact of fosamprenavir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check. pentobarbital will decrease the extent or result of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Watch. benzhydrocodone/acetaminophen and pentobarbital both boost sedation. Prevent or Use Alternate Drug. Res... https://augustinek418wya6.wikibyby.com/user