Butabarbital will minimize the level or impact of zaleplon by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Significance Mysterious. butabarbital will lower the level or outcome of vardenafil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on. butabarbital will lessen the level or result of hydrocortisone by affecting hepatic/intestinal... https://steveg913jlm7.wikinstructions.com/user