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Pregnancy Prevention—Nearly 90%
You Should Know
- Do not swallow any extra pills. Extra pills will not further reduce your risk of pregnancy, but they could make you feel sick.
- If you throw up within one hour of taking the pills, call your doctor. You may need to repeat a dose or take anti-nausea medicine.
Call your doctor if you have any of these symptoms:
- Severe leg pain
- Severe abdominal pain
- Chest pain, cough, or shortness of breath
- Blurred or loss of vision
- Using emergency contraception frequently can cause your menstrual cycle to become irregular.
- You should start your period within a month. If you do not have a period when you expect to, take a pregnancy test.
Other Emergency Contraceptives
Where to Get Emergency Contraception
Planned Parenthood http://www.plannedparenthood.org
US Food and Drug Administration http://www.fda.gov
The Society of Obstetricians and Gynaecologists of Canada http://www.sogc.org
Women's Health Matters http://www.womenshealthmatters.ca
Answers to frequently asked questions about types of emergency contraception. The Emergency Contraception Website. Available at: http://ec.princeton.edu/questions/dose.html. Updated June 12, 2013. Accessed July 17, 2013.
Emergency contraception. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed/what. Updated May 3, 2013. Accessed July 17, 2013.
Emergency contraception. American Academy of Family Physicians Family Doctor website. Available at: http://familydoctor.org/familydoctor/en/prevention-wellness/sex-birth-control/birth-control/emergency-contraception.html. Updated January 2011. Accessed July 17, 2013.
Emergency contraception. American Congress of Obstetricians and Gynecologists website. Available at: http://www.acog.org/~/media/For%20Patients/faq114.pdf?dmc=1&ts=20130718T1316014689. Accessed July 17, 2013.
Lo SS, Ho PC. Changes in contraceptive choice after emergency contraception. Int J Gynaecol Obstet . 2012;118(3):223-226.
Morning-after pill (emergency contraception). Planned Parenthood website. Available at: http://www.plannedparenthood.org/health-topics/emergency-contraception-morning-after-pill-4363.asp. Accessed July 17, 2013.
Piaggio G, von Hertzen H, Grimes DA, Van Look PFA. For: Task Force on Postovulatory Methods of Fertility Regulation. Timing of emergency contraception with levonorgestrel or the Yuzpe regimen. Lancet . 1999;353:721.
Task Force on Postovulatory Methods of Fertility Regulation. Randomised controlled trial of levonorgestrel versus the Yuzpe regimen of combined oral contraceptives for emergency contraception. Lancet . 1998;352:428-433.
Unintended pregnancy. Centers for Disease Control and Prevention website. Available at: http://www.cdc.gov/reproductivehealth/unintendedpregnancy/index.htm. Updated February 12, 2013. Accessed July 17, 2013.
5/6/2013 DynaMed's Systematic Literature Surveillance http://www.ebscohost.com/dynamed/what : US Food and Drug Administration. FDA approves Plan B One-Step emergency contraceptive without a prescription for women 15 years of age and older. US Food and Drug Administration website. Available at: http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm350230.htm. Updated April 30, 2013. Accessed July 17, 2013.
- Reviewer: Michael Woods, MD
- Review Date: 07/2013
- Update Date: 07/17/2013