Watch Carefully (1)istradefylline will increase the stage or influence of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism.ceritinib will boost the stage or influence of diazepam by influencing hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Observe.enzalutamide will reduce the level or result of diazepam by affecting hepa