pentobarbital will minimize the level or influence of aripiprazole by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Observe.pentobarbital increases effects of ifosfamide by impacting hepatic enzyme CYP2B6 metabolism. Use Caution/Observe. Coadministration of ifosfamide with CYP2B6 inducers may well enhance metabolism of ifosfami