Butabarbital decreases results of hemin by pharmacodynamic antagonism. Use Caution/Watch. Medicines that raise delta-aminolevulinic acid synthetase may lower hemin influence. butabarbital will lower the extent or result of glecaprevir/pibrentasvir by influencing hepatic/intestinal enzyme CYP3A4 metabolism. butabarbital will reduce the extent or outcome of diazepam intranasal by impact... https://johnf791efh5.wikifrontier.com/user