butabarbital will reduce the extent or effect of amlodipine by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Check.butabarbital will minimize the level or result of glecaprevir/pibrentasvir by affecting hepatic/intestinal enzyme CYP3A4 metabolism.Teniposide: Barbiturates may perhaps lower the serum focus of Teniposide. Administ