Pentobarbital will reduce the level or result of buprenorphine buccal by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe. pentobarbital will reduce the level or impact of repaglinide by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check. pentobarbital will lessen the level or result of theophylline by impacting hepatic/intestinal enzyme... https://chrisd813ula4.pennywiki.com/user