pentobarbital decreases amounts of toremifene by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Warning/Observe. CYP3A4 inducers improve price of toremifene metabolism, reducing the constant-state concentration in serum.pentobarbital will lower the level or effect of theophylline by impacting hepatic/intestinal enzyme CYP3A4 metabolism.… Read More