nifedipine will boost the level or impact of diazepam by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Keep an eye on.Use Warning/Watch. Ethinyl estradiol may inhibit the clearance of benzodiazepines that undertake oxidation, therefore increasing serum concentrations of concomitantly administered benzodiazepines.Since Valium pr