butabarbital will lower the level or outcome of nicardipine by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.butabarbital will lessen the extent or impact of levamlodipine by influencing hepatic/intestinal enzyme CYP3A4 metabolism.butabarbital will minimize the extent or influence of levoketoconazole by influencing he… Read More