butabarbital will decrease the extent or effect of nitrendipine by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Importance Unidentified.butabarbital will lessen the level or outcome of glecaprevir/pibrentasvir by influencing hepatic/intestinal enzyme CYP3A4 metabolism.Should you have been taking this drugs for a very long time, nev