Editing Emergency contraception (section)

===Types===
A variety of emergency contraceptive pills are available, including combined estrogen and progestin pills; progestin-only ([[levonorgestrel]], LNG) pills; and [[antiprogestogen|antiprogestin]] ([[ulipristal acetate]] or [[mifepristone]]) pills.<ref name="Trussell 2014">{{cite web| vauthors = Trussell J, Raymond EG, Cleland K |date=February 2014|title=Emergency contraception: a last chance to prevent unintended pregnancy|location=Princeton|publisher=Office of Population Research at Princeton University, Association of Reproductive Health Professionals|url=http://ec.princeton.edu/questions/ec-review.pdf|access-date=March 25, 2014|archive-date=September 23, 2010|archive-url=https://web.archive.org/web/20100923040101/http://ec.princeton.edu/questions/ec-review.pdf|url-status=dead}}</ref> Progestin-only and anti-progestin pills are available as specifically packaged pills for use as emergency contraceptive pills.<ref name="Trussell 2014"/><ref name="Gemzell-Danielsson 2013">{{cite journal | vauthors = Gemzell-Danielsson K, Rabe T, Cheng L | title = Emergency contraception | journal = Gynecological Endocrinology | volume = 29 | issue = Supplement 1 | pages = 1–14 | date = March 2013 | pmid = 23437846 | doi = 10.3109/09513590.2013.774591 | s2cid = 27722686 }}</ref> Emergency contraceptive pills originally contained higher [[Dose (biochemistry)|doses]] of the same [[hormone]]s ([[estrogen (medication)|estrogen]]s, [[progestin]]s, or both) found in regular [[combined oral contraceptive pill]]s. Combined estrogen and progestin pills are no longer recommended as dedicated emergency contraceptive pills (because this regimen is less effective and caused more nausea), but certain regular combined oral contraceptive pills (taken 2–5 at a time in what was called "the [[Yuzpe regimen]]") have also been shown to be effective as emergency contraceptive pills.<ref name="Trussell 2014"/>

Progestin-only emergency contraceptive pills contain levonorgestrel, either as a single tablet (or historically, as a split dose of two tablets taken 12&nbsp;hours apart), effective up to 72&nbsp;hours after intercourse.<ref name="Trussell 2014"/> Progestin-only ECPs are sold under many different brand names.<ref name="Trussell 2013">{{cite web|last1=Trussell|first1=James|last2=Cleland|first2=Kelly|date=February 13, 2013|title=Dedicated emergency contraceptive pills worldwide|location=Princeton|publisher=Office of Population Research at Princeton University, Association of Reproductive Health Professionals|url=http://ec.princeton.edu/pills/Dedicated_ECPs.pdf|access-date=March 25, 2014|archive-date=March 4, 2016|archive-url=https://web.archive.org/web/20160304190311/http://ec.princeton.edu/pills/Dedicated_ECPs.pdf|url-status=dead}}</ref><ref name="ICEC 2014">{{cite web|author=ICEC|year=2014|title=EC pill types and countries of availability, by brand|location=New York|publisher=International Consortium for Emergency Contraception (ICEC)|url=http://www.cecinfo.org/country-by-country-information/status-availability-database/ec-pill-types-and-countries-of-availability-by-brand/|access-date=March 25, 2014|archive-date=April 5, 2016|archive-url=https://web.archive.org/web/20160405095026/http://www.cecinfo.org/country-by-country-information/status-availability-database/ec-pill-types-and-countries-of-availability-by-brand/|url-status=usurped}}</ref><ref name="ECEC 2014">{{cite web|author=ECEC|year=2014|title=Emergency contraception availability in Europe|location=New York|publisher=European Consortium for Emergency Contraception (ECEC)|url=http://www.ec-ec.org/emergency-contraception-in-europe/emergency-contraception-availability-in-europe/|access-date=March 25, 2014}}</ref> Progestin-only ECPs are available [[over-the-counter drug|over-the-counter]] (OTC) in many countries (e.g. Australia, Bangladesh, Bulgaria, Canada, Cyprus, Czech Republic, Denmark, Estonia, India, Malta, Netherlands, Norway, Portugal, Romania, Slovakia, South Africa, Sweden, United States), from a pharmacist without a prescription, and available with a prescription in some other countries.<ref name="Trussell 2013"/><ref name="ICEC 2014"/><ref name="ECEC 2014"/>

The antiprogestin ulipristal acetate is available as a micronized emergency contraceptive tablet, effective up to 120&nbsp;hours after intercourse.<ref name="Trussell 2014"/><ref name="Gemzell-Danielsson 2013"/> Ulipristal acetate ECPs developed by [[HRA Pharma]] are available over the counter in Europe<ref>{{cite journal | vauthors = Italia S, Brand H | title = Status of Emergency Contraceptives in Europe One Year after the European Medicines Agency's Recommendation to Switch Ulipristal Acetate to Non-Prescription Status | journal = Public Health Genomics | volume = 19 | issue = 4 | pages = 203–210 |year = 2016 | pmid = 27022731 | doi = 10.1159/000444686 | doi-access = free }}</ref> and by prescription in over 50 countries under the brand names ellaOne, ella (marketed by [[Actavis|Watson Pharmaceuticals]] in the United States), Duprisal 30, Ulipristal 30, and UPRIS.<ref name="Trussell 2013"/><ref name="ICEC 2014"/><ref name="ECEC 2014"/><ref name="ellaOne">{{cite web|author=HRA Pharma|author-link=HRA Pharma|date=March 2013|title=Countries where ellaOne was launched|location=Paris|publisher=[[HRA Pharma]]|url=http://www.ellaone.com/#countries|access-date=March 25, 2014|archive-url=https://web.archive.org/web/20130728203014/http://www.ellaone.com/#countries|archive-date=July 28, 2013|url-status=dead}}</ref>

The antiprogestin [[mifepristone]] (also known as RU-486) is available in five countries as a low-dose or mid-dose emergency contraceptive tablet, effective up to 120 hours after intercourse.<ref name="Trussell 2014"/><ref name="Gemzell-Danielsson 2013"/> Low-dose mifepristone ECPs are available by prescription in Armenia, Russia, Ukraine, and Vietnam and from a pharmacist without a prescription in China.<ref name="Trussell 2013"/><ref name="ICEC 2014"/> Mid-dose mifepristone ECPs are available by prescription in China and Vietnam.<ref name="Trussell 2013"/><ref name="ICEC 2014"/>

Combined estrogen ([[ethinylestradiol]]) and progestin (levonorgestrel or [[norgestrel]]) pills used to be available as dedicated emergency contraceptive pills under several brand names: ''Schering PC4'', ''Tetragynon'', ''Neoprimavlar'', and ''Preven'' (in the United States) but were withdrawn after more effective dedicated progestin-only (levonorgestrel) emergency contraceptive pills with fewer side effects became available.<ref name="Trussell 2014"/> If other more effective dedicated emergency contraceptive pills (levonorgestrel, ulipristal acetate, or mifepristone) are not available, specific combinations of regular combined oral contraceptive pills can be taken in split doses 12&nbsp;hours apart (the Yuzpe regimen), effective up to 72&nbsp;hours after intercourse.<ref name="Trussell 2014"/>

The U.S. [[Food and Drug Administration]] (FDA) approved this [[off-label use]] of certain brands of regular combined oral contraceptive pills in 1997.<ref name="fr 1997"/> As of 2014, there are 26&nbsp;brands of regular combined oral contraceptive pills containing levonorgestrel or norgestrel available in the United States that can be used in the emergency contraceptive Yuzpe regimen,<ref name="Trussell 2014"/> when none of the more effective and better-tolerated options are available.