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Drug-drug interactions among combined oral contraceptive pills and other medications of the user that decrease contraceptive estrogen and/or progestogen levels. [ 44 ] In any of these instances, a backup contraceptive method should be used until hormone active pills have been consistently taken for 7 consecutive days or drug-drug interactions ...
Between 2015 and 2017, 64.9% of women ages 15–49 in the United States were using contraception, and of those 12.6% were using the oral contraceptive pill. [46] There are approximately 100 million users of combined oral contraceptives worldwide, with use being more common in Western Europe, Northern Europe, and the United States. [ 47 ]
Progestins in birth control pills are sometimes grouped by generation. [ 239 ] [ 240 ] While the 19-nortestosterone progestins are consistently grouped into generations, the pregnane progestins that are or have been used in birth control pills are typically omitted from such classifications or are grouped simply as "miscellaneous" or "pregnanes".
Estradiol-containing birth control pills were initially studied in the 1970s, with the first report published in 1977. [230] [231] Development of birth control pills containing estradiol was motivated by the thrombotic risks of ethinylestradiol that were uncovered in the 1960s and 1970s.
Tamoxifen, sold under the brand name Nolvadex among others, is a selective estrogen receptor modulator used to prevent breast cancer in women and men. [13] It is also being studied for other types of cancer. [13] It has been used for Albright syndrome. [14] Tamoxifen is typically taken daily by mouth for five years for breast cancer. [14]
Levonorgestrel is a hormonal medication which is used in a number of birth control methods. [3] [7] It is combined with an estrogen to make combination birth control pills. [8]As an emergency birth control, sold under the brand names Plan B One-Step and Julie, among others, it is useful within 72 hours of unprotected sex.
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