pentobarbital will minimize the level or effect of pimozide by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Insignificant/Importance Unknown.pentobarbital will lower the level or influence of fentanyl transmucosal by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Modify Therapy/Keep an eye on Closely. Coadministration of fentany