Butabarbital will lessen the level or influence of amlodipine by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Watch. butabarbital will minimize the level or effect of pioglitazone by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Insignificant/Importance Unknown. Butabarbital is likewise bought in combination with belladonna alkaloids beneath the mode... https://marjaneyq345gqf3.wikikarts.com/user