Butabarbital decreases effects of hemin by pharmacodynamic antagonism. Use Caution/Keep an eye on. Medications that raise delta-aminolevulinic acid synthetase could lessen hemin impact. butabarbital will lower the level or impact of estrogens esterified by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Watch. butabarbital will lessen the level or outcome of levoket... https://englandv662dbc9.wikicommunications.com/user