Pentobarbital will reduce the extent or influence of montelukast by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Small/Importance Unknown. pentobarbital will decrease the level or impact of clarithromycin by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Minimal/Significance Not known. pentobarbital improves consequences of ifosfamide by affecting hepatic enzyme CYP2... https://mediajx.com/story23763294/top-latest-five-nembutal-powder-for-sale-online-urban-news