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A female asked:

So i took the plan b pill while on my period and my period ended two days early than it should've.

1 doctor answer2 doctors weighed in
Dr. Alvin Lin
Geriatrics 30 years experience
Expected side effect: One of many side effects of Plan B is change in menses (http://www.drugs.com/sfx/plan-b-side-effects.html). Assuming that you took Plan B b/c you engaged in unprotected sex, go see your Family Doc, GYN or Planned Parenthood to get tested for sexually transmitted diseases/infections. And to discuss birth control options (http://goo.gl/2QKlgt), not just emergency contraception (goo.gl/J0Mgor).

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Similar questions

Saint Albans, NY
A 17-year-old female asked:

I took a plan B & my period is 4 Days late ?

2 doctor answers3 doctors weighed in
Dr. Lori Semel
Pediatrics 35 years experience
Cycle is irregular: The Plan B pill can make your cycle irregular,it does NOT mean it is not effective. Plan B can work in one of three ways depending on where you are in your cycle. It can prevent or delay ovulation, can interfere with the fertilization of the egg or may prevent implantation by altering the lining of the uterus. If you take Plan B One-Step within 24 hours, it is about 95% effective.

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Last updated May 30, 2015

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