Butabarbital will lower the extent or effect of amlodipine by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Observe. butabarbital will decrease the extent or outcome of glecaprevir/pibrentasvir by impacting hepatic/intestinal enzyme CYP3A4 metabolism. butabarbital will decrease the level or result of levoketoconazole by impacting hepatic/intestinal enzyme CYP3A4 m... https://zanej852wrq5.blogvivi.com/profile