Approved by the FDA in 2001, the patch is sold by prescription and releases ethinyl estradiol (a type of estrogen), and a progestin called norelgestromin via the skin into the bloodstream.

• FDA在2001年就已经证实，这种通过渗透皮肤来释放雌激素和孕激素的贴膜是一种处方类药物。