Butabarbital will lower the level or influence of nifedipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minimal/Importance Unfamiliar. butabarbital will minimize the level or outcome of levamlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. close Make sure you verify that you want to log out of Medscape. Should you Sign off, you https://moseleyk987zgl4.evawiki.com/user