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。
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。
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