Pentobarbital will lessen the level or effect of ritonavir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe. pentobarbital will lower the level or impact of nicardipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. benzhydrocodone/acetaminophen and pentobarbital both improve sedation. Steer clear of or Use Alternate Drug. L... https://alfredm011tjw9.frewwebs.com/profile