pentobarbital will decrease the level or influence of nitrendipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Significance Mysterious.pentobarbital will lower the level or impact of mifepristone by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Monitor. CYP3A4 inducers haven't been analyzed, coadministratio