butabarbital will minimize the level or outcome of fedratinib by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Avoid or Use Alternate Drug. Effect of coadministering a powerful CYP3A4 inducer with fedratinib hasn't been studied.butabarbital will lessen the extent or result of conivaptan by influencing hepatic/intestinal enzyme CYP3A4 met… Read More