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How does Plan B One-Step work?

ANSWER

Depending upon where you are in your cycle, Plan B One-Step may work in one of these ways:

It is also possible that this type of emergency birth control prevents implantation of a fertilized egg in the uterus by altering its lining.

  • It may prevent or delay ovulation.
  • It may interfere with fertilization of an egg.

SOURCES:

FDA: "FDA's Decision Regarding Plan B: Questions and Answers" and "Plan B (0.75mg levonorgestrel) and Plan B One-Step (1.5 mg levonorgestrel) Tablets Information."

The National Women's Health Information Center: "Emergency Contraception (Emergency Birth Control)."

Planned Parenthood: "Emergency Contraception (Morning After Pill)."

Office of Population Research, Princeton University: "Get Emergency Contraception NOW."

University of Illinois at Urbana-Champaign: "Plan B One-Step Emergency Contraception."

News release, FDA.

Duramed Pharmaceuticals, Inc.

Healthy Canadians web site.  

Reviewed by Traci C. Johnson on June 7, 2018

SOURCES:

FDA: "FDA's Decision Regarding Plan B: Questions and Answers" and "Plan B (0.75mg levonorgestrel) and Plan B One-Step (1.5 mg levonorgestrel) Tablets Information."

The National Women's Health Information Center: "Emergency Contraception (Emergency Birth Control)."

Planned Parenthood: "Emergency Contraception (Morning After Pill)."

Office of Population Research, Princeton University: "Get Emergency Contraception NOW."

University of Illinois at Urbana-Champaign: "Plan B One-Step Emergency Contraception."

News release, FDA.

Duramed Pharmaceuticals, Inc.

Healthy Canadians web site.  

Reviewed by Traci C. Johnson on June 7, 2018

NEXT QUESTION:

Does Plan B One-Step cause a miscarriage or abortion?

WAS THIS ANSWER HELPFUL

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.

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