pentobarbital will decrease the level or effect of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inducers have not been studied, coadministration not recommended by manufacturerpentobarbital will decrease the level or effect of eplerenone samhälle affecting hepatic/intestinal enzyme CYP3A4 metab