Pentobarbital will reduce the extent or influence of gefitinib by impacting hepatic/intestinal enzyme CYP3A4 metabolism. pentobarbital will reduce the level or impact of armodafinil by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Unfamiliar. pentobarbital raises toxicity of ifosfamide by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Wa... https://altonx602jnq9.bloggosite.com/profile