Mavacamten will lower the level or influence of ethinylestradiol by impacting hepatic/intestinal enzyme CYP3A4 metabolism. Stay away from or Use Alternate Drug. Progestin and ethinyl estradiol are CYP3A4 substrates. Mavacamten might lower systemic exposures of ethinyl estradiol and progestin, which can cause contraceptive failure or a rise in breakthrough bleeding. https://wymzya-fe15825.full-design.com/the-definitive-guide-to-wymzya-fe-birth-control-72990858