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Plan B One-Step

(continued)

Side Effects of Plan B One-Step

Many women have taken emergency contraception without serious complications. But it's a good idea to ask your doctor about possible interactions with other medications.

Plan B One-Step is considered safe for most women. You should not take it if you are pregnant because it will not end the pregnancy.

Potential side effects of Plan B One-Step include:

  • nausea
  • abdominal pain
  • fatigue
  • headache
  • menstrual changes
  • dizziness
  • breast tenderness
  • vomiting

If you vomit within two hours after taking the drug, call a healthcare professional to find out if you should repeat the dose. 

With Plan B One-Step, you may also have some unexpected bleeding. It should go away by the time of your next period. However, it is possible that Plan B One-Step may cause your next period to be heavier or lighter than usual. It may also come earlier or later than is normal for you. If you don't get your period within three weeks, get a pregnancy test to make sure you're not pregnant.

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WebMD Medical Reference

Reviewed by Kimball Johnson, MD on August 05, 2012
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