Pentobarbital will lessen the extent or effect of pantoprazole by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Importance Unknown. pentobarbital will minimize the extent or impact of atorvastatin by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check. pentobarbital will reduce the extent or impact of nelfinavir by affecting hepatic/intestinal enzy... https://citychemiststore.com/product/buy-nembutal-powder-online/