Cahill Erica P, Blumenthal Paul D
Division of Family Planning Services and Research, Department of Obstetrics and Gynecology, Stanford University School of Medicine, Stanford, California, USA.
Curr Opin Obstet Gynecol. 2018 Dec;30(6):400-406. doi: 10.1097/GCO.0000000000000491.
To evaluate the literature on repeat use of emergency contraception and pericoital approaches to contraception.
Women are very interested in an oral, on-demand contraceptive option, were one available. Ulipristal acetate and a combination of levonorgestrel (LNG) and meloxicam (a cyclo-oxygenase-2 inhibitor) both appear to be more effective at disrupting ovulation than LNG alone. Recent advisories from the United Kingdom regarding daily dosing of ulipristal for fibroids emphasize the need for more safety data.
Repeat pericoital dosing of 1.5-mg LNG is approximately as effective as other on-demand contraceptive methods and is overall very safe. The most common side effect is irregular bleeding. Repeat on-demand ulipristal acetate or meloxicam/other cyclo-oxygenase-2 inhibitors have potential as an on-demand option either alone or in combination but have not been evaluated for contraceptive efficacy in a large-scale study. Given the high unmet need for contraception, even among women with access to available options, there is a distinct need for options that address needs of women who are interested in an on-demand option. On-demand oral contraception has the potential to expand the convenience of contraceptive options and overall contraceptive use.
评估关于紧急避孕重复使用及性交期间避孕方法的文献。
如果有口服、按需使用的避孕选择,女性对此会非常感兴趣。醋酸乌利司他以及左炔诺孕酮(LNG)与美洛昔康(一种环氧化酶-2抑制剂)的组合在干扰排卵方面似乎比单独使用LNG更有效。英国近期关于醋酸乌利司他每日用于治疗子宫肌瘤的建议强调需要更多安全性数据。
1.5毫克LNG重复性交期间给药的效果与其他按需使用的避孕方法大致相同,总体非常安全。最常见的副作用是不规则出血。重复按需使用醋酸乌利司他或美洛昔康/其他环氧化酶-2抑制剂单独或联合使用都有作为按需使用选择的潜力,但尚未在大规模研究中评估其避孕效果。鉴于对避孕的需求未得到充分满足,即使在有可用选择的女性中也是如此,显然需要有能满足对按需使用选择感兴趣的女性需求的方法。按需口服避孕有可能增加避孕选择的便利性并提高总体避孕使用率。