How Long Does Plan B Stay In Your System


Plan B or Emergency Contraceptive Pill is the quickest method to prevent unwanted pregnancy after unprotected sex. Unplanned childbirth is risky for both you and your partner.

After taking an emergency pill, you might feel some discomfort. And someone who is planning to conceive might be worried about the aftereffect of ECP. So, how long does plan B stay in your system? Let’s find out.

What is Plan B

Plan B or morning-after pill is the over-the-counter solution for preventing pregnancy. People can have unprotected intercourse by accident or at will. After the intercourse, it takes at least 3 to 5 days to get pregnant. An emergency pill contains the sex hormone progesterone that stops ovulation. 

Sperms can live up to 72 hours in female genitalia. But in some cases, it can stay unfertile till five days. So, if you take an emergency pill within 120 hours of sex, that might work for you to stop pregnancy. 

How long Emergency Pill will stay in my system

The hormones released from the emergency pill stay in the body for 2 days. After that, the hormones will stop working in your system. However, it will take your next period to clean out the remaining hormones from the pill. 

Will I get pregnant after taking plan B

You will have to understand how the emergency pill works. An emergency pill will prevent pregnancy after you take it after sex. Yet, if you again get into unprotected intercourse, then the last medicine won’t stop pregnancy. You will have to take another ECP. So, you can get pregnant even you took a pill earlier having sex.

What are the side effects

As you are taking external hormones, your body will react to that. It will bring change in your cycle. Most of the time, you will have your next period a week early than expected. The bleeding may also seem irregular. There are records of getting both heavier and lighter bleeding. 

Also, it’s pretty common in women to have spotting within few days of taking a pill. Some people say that’s the indication the medicine worked, but it’s not entirely correct. Still, if you get spotting, don’t worry.

Some less common side effects are listed here:

  • Stomach Ache and Cramping 
  • Headache
  • Breast Tenderness
  • Nausea
  • Dizziness
  • Feeling Heavy
  • Fatigue
  • More pain than usual in periods

Coping Up with Side Effects

If you are getting all the signs after taking a pill, first give your body a little time to handle it. If you feel the pain in your stomach or headache is too intense, you can take some painkillers. You can take small meals frequently to heal from Nausea and dizziness.

Sucking suger-free candy might help you from vomiting. And if your stomach is upset, taking any medicine from your nearby pharmacy is enough. If you ever feel it’s unbearable, talking to a physician is the best route.


It can vary how long does plan B stays in your system. It remains active for 2 days but it can take two months to flush out from your system. 

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