butabarbital will lessen the level or impact of doxorubicin liposomal by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep track of.butabarbital will reduce the level or impact of conivaptan by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check.butabarbital will reduce the level or effect of eltrombopag