Pentobarbital will lower the level or impact of ethotoin by influencing hepatic enzyme CYP2C9/10 metabolism. Use Caution/Monitor. pentobarbital improves effects of ifosfamide by influencing hepatic enzyme CYP2B6 metabolism. Use Warning/Keep track of. Coadministration of ifosfamide with CYP2B6 inducers might boost metabolism of ifosfamide to its metabolite. Observe for greater effects/... https://tonyx790qja3.wikicorrespondence.com/user