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Is Plan-B Less Effective In Women Over 75 Kgs?

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Posted on Tue, 6 Oct 2015
Question: I TOOK PLAN B AS EMERGENCY CONTACEPTIVE MY QUESTION IS MY WEIGHT IS OVER 75 KG I WAS TOLD BY PHARMACIST THAT I NEED TO SEE DR AND HAVE SOMETHING ELSE /
doctor
Answered by Dr. Bonnie Berger-Durnbaugh (42 minutes later)
Brief Answer:
Yes, Plan B is considered less effective over 165 lbs/75kg.

Detailed Answer:
Hello and welcome to HCM.

The pharmacist you spoke with is correct: Plan B is more effective in women under 75 kg, and questionably effective if you are over that weight.

I would advise that you see a doctor ASAP (do you have walk in clinics or Planned Parenthood you can go to in Canada?). If it is within 5 days, another choice would be insertion of the Copper T IUD for emergency contraception. The window for emergency contraception is 5 days but the sooner the better.

I hope this information helps.



Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Follow up: Dr. Bonnie Berger-Durnbaugh (51 minutes later)
If im 35 years of age what are mine chances if getting preagnant my preriod been regular never painfull
doctor
Answered by Dr. Bonnie Berger-Durnbaugh (1 hour later)
Brief Answer:
Depends on a number of factors.

Detailed Answer:
I can't give you an exact figure. What would increase your chance of getting pregnant is:

If you were near ovulation when you had unprotected sex (usually the middle of your cycle but not always).

How much time elapsed after unprotected sex before you took Plan B.

Weight over 75 kg. (Here is information that might help you understand what this is about: http://www.popsci.com/article/science/fyi-why-doesnt-plan-b-work-heavier-women)

So I strongly encourage you to get in to see a doctor ASAP.
Note: For further follow up on related General & Family Physician Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Bonnie Berger-Durnbaugh

General & Family Physician

Practicing since :1991

Answered : 3134 Questions

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Is Plan-B Less Effective In Women Over 75 Kgs?

Brief Answer: Yes, Plan B is considered less effective over 165 lbs/75kg. Detailed Answer: Hello and welcome to HCM. The pharmacist you spoke with is correct: Plan B is more effective in women under 75 kg, and questionably effective if you are over that weight. I would advise that you see a doctor ASAP (do you have walk in clinics or Planned Parenthood you can go to in Canada?). If it is within 5 days, another choice would be insertion of the Copper T IUD for emergency contraception. The window for emergency contraception is 5 days but the sooner the better. I hope this information helps.