pentobarbital will minimize the level or influence of etravirine by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.pentobarbital will increase effects of ifosfamide by impacting hepatic enzyme CYP2B6 metabolism. Use Warning/Keep an eye on. Coadministration of ifosfamide with CYP2B6 inducers may boost metabolism of ifosfa