Butabarbital will lower the level or outcome of nitrendipine by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Significance Not known. butabarbital will lower the level or outcome of estrogens esterified by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Monitor. butabarbital will lessen the extent or impact of eltrombopag by impacting hepatic enzym... https://englande652hmp6.bloggerbags.com/profile