The present invention relates to a patch comprising a drug-containing layer with low content of hormones, such as gestodene, and optionally an estrogen (e.g. ethinyl estradiol). Upon administering the patch to a woman, plasma levels of at least 1.0 ng/ml of Gestodene is achieved at steady state conditions without the need of incorporating penetration enhancers or permeation enhancers in the drug-containing layer. Satisfactorily plasma levels of the hormones is also achieved throughout a period of at least 1 week, making the patch applicable for being used in female contraception with the concept of administering the patch ones weekly.
本发明涉及一种贴片,该贴片由含低含量激素(如孕烯)和可选
雌激素(如
炔雌醇)的药物层组成。妇女使用该贴片后,在稳态条件下,孕烯的血浆浓度至少可达到 1.0 纳克/毫升,而无需在含药层中加入渗透
促进剂或渗透增强剂。在至少一周的时间里,激素的血浆浓度也能达到令人满意的
水平,因此这种贴片可用于女性避孕,每周使用一次。