rifapentine will lessen the extent or result of diazepam by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Use Caution/Check.ethinylestradiol will raise the amount or impact of diazepam by System: decreasing metabolism. Use Caution/Watch. Ethinyl estradiol might inhibit the clearance of benzodiazepines that go through oxidation, thus raisin