Butabarbital will lessen the extent or effect of amlodipine by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch. butabarbital will lower the level or effect of glecaprevir/pibrentasvir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. butabarbital will minimize the level or result of prednisolone by affecting hepatic/intestinal enzyme CYP3A4 metabol... https://jeanx332muc1.sunderwiki.com/user