Butabarbital will reduce the level or influence of zaleplon by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Slight/Importance Unfamiliar. butabarbital will lower the level or result of sufentanil by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Minor/Importance Not known. butabarbital will minimize the level or result of ritonavir by influencing hepatic/intestinal e... https://gracea334fcx0.blog2freedom.com/profile