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How effective is Plan B One-Step as an emergency contraception?

ANSWER

If Plan B One-Step is taken as directed after unprotected sex, it will lower the chances of pregnancy. About 7 out of every 8 women who would have gotten pregnant don't become pregnant. However, research shows that Plan B One-Step starts to lose its effectiveness in women heavier than 165 pounds and is not recommend for anyone over this weight. Instead, an IUD is the suggested option in this group.

From: Emergency Contraception WebMD Medical Reference

SOURCES: 

The National Women's Health Information Center: "Plan B."

FDA.

Duramed Pharmaceuticals, Inc.

Teva Women's Health, Inc. 

Healthy Canadians web site.

UpToDate.com: "Emergency Contraception." "Intrauterine Contraception."

PlanBOneStep.com.

MyNextChoiceOneDose.com.

Reviewed by Traci C. Johnson on June 07, 2018

SOURCES: 

The National Women's Health Information Center: "Plan B."

FDA.

Duramed Pharmaceuticals, Inc.

Teva Women's Health, Inc. 

Healthy Canadians web site.

UpToDate.com: "Emergency Contraception." "Intrauterine Contraception."

PlanBOneStep.com.

MyNextChoiceOneDose.com.

Reviewed by Traci C. Johnson on June 07, 2018

NEXT QUESTION:

How effective is an IUD as emergency contraception?

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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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