Pentobarbital will lower the extent or outcome of gefitinib by affecting hepatic/intestinal enzyme CYP3A4 metabolism. pentobarbital will minimize the level or result of bortezomib by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on. Warning when discontinuing CYP3A4 inducers that are coadministered with hydrocodone; plasma concentrations of hydrocodo... https://williamw220ycy2.celticwiki.com/user