butabarbital will lower the level or result of doravirine by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Contraindicated.butabarbital will lessen the extent or impact of vardenafil by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Keep an eye on.butabarbital will lower the extent or influence of eltrombopag by affec