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Doctor insights on: How Long Does Plan B Stay In Your System

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Dr. Donald Rock
Board Certified, Obstetrics and Gynecology
66 years in practice
153K people helped
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How long does Plan B stay in your system?

How long does Plan B stay in your system?

24-48 hours: The drug reaches its highest concentration in about 2 hours and, assuming normal liver and kidney function should be out of your body between 24 and 48 hours. ...Read more

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Dr. Eric Weisman
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30 years in practice
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Dr. Justin Diedrich
813 doctors shared insights

Levonorgestrel (Definition)

Levonorgestrel is a progestin commonly used in oral contraceptives and the Mirena iud. It has ...Read more


Dr. Bryan Kurtz
Board Certified, Obstetrics and Gynecology
28 years in practice
3M people helped
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How long does Plan B stay in your system, because I have to take a body detox?

How long does Plan B stay in your system, because I have to take a body detox?

A few days: The hormones will be out of your system within a few days to maybe a week at tops. However, the effects on dementia cyclamate last for 2 to 3 weeks. ...Read more

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Dr. Eric Weisman
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Dr. Timothy Brown
Board Certified, Obstetrics and Gynecology
38 years in practice
3M people helped
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I am breastfeeding. How long does plan B stay in your system? I am worried about taking plan be and what it will do to my 6 month old. I am exclusively breastfeeding but worried about getting pregnant because now is definitely not the time.

I am breastfeeding. How long does plan B stay in your system?  I am worried about taking plan be and what it will do to my 6 month old. I am exclusively breastfeeding but worried about getting pregnant because now is definitely not the time.

Not a concern: The progesterone hormone in Plan B is safe to take while breastfeeding and will not harm your child. Exclusive breastfeeding will provide you with some protection but you might want to discuss with your doctor about going on the "mini pill" for better reliability. This is a better option that episodically using Plan B. ...Read more

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Dr. Heidi Fowler
Board Certified, Psychiatry
19 years in practice
527M people helped
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How long does for Plan B stay in your system?

Briefly: Even though Plan B is out of your system relatively quickly, the hormonal changes that occur may take up to several months after the Plan B was taken to even out. ...Read more

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Dr. Eric Weisman
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30 years in practice
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Dr. Heidi Fowler
Board Certified, Psychiatry
19 years in practice
527M people helped
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How long does Plan B one step stay in your system?

Briefly: Even though Plan B is out of your system relatively quickly, the hormonal changes that occur may take up to several months after the Plan B was taken to even out. ...Read more

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Dr. Philip Miller
Board Certified, Family Medicine
41 years in practice
13M people helped
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Dr. Heidi Fowler
Board Certified, Psychiatry
19 years in practice
527M people helped
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Dr. Heidi Fowler
Board Certified, Psychiatry
19 years in practice
527M people helped
8

8
How long does Plan B last in your system?

Well: Even though Plan B is out of your system relatively quickly, the hormonal changes that occur may take up to several months after the Plan B was taken to even out. ...Read more

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Dr. Jeffrey Levine
Board Certified, Family Medicine
25 years in practice
1M people helped
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Had protected sex 4/3 Took a plan b 4/5 Did it work ? How long will be stay in my system? Thanks!

Had protected sex 4/3
Took a plan b 4/5

Did it work ? 

How long will be stay in my system?

Thanks!

Depends on ur weight: Plan B is usually effective up to 5 days after unprotected sex, but most effective within first 72hrs (~88% reduction in unintended pregnancy). However recent studies found that Plan B is less effective in women weighing >165lbs, and ineffective if >175lbs. It does not stay in system more than a few days. ...Read more

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Dr. Henry Jacobs
Board Certified, Obstetrics and Gynecology
60 years in practice
880K people helped
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How long does it take for plan B to leave my system?

48 hours: the medicine is usually out of your system in 48 hours but the effects on your uterus and ovaries can last weeks. ...Read more

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Dr. Eric Weisman
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