If you’re going to take Plan B, you want to know how it works. So let’s start with the facts.
What Plan B is:
What Plan B isn’t:
Plan B is safe and effective
Plan B contains levonorgestrel—the same active ingredient used in many popular birth control pills—just at a single, higher dose. That said, it shouldn’t be used as regular birth control. If you find that you have had to use emergency contraception multiple times, talk to your doctor about finding a regular birth control method that’s right for you.
Common Plan B side effects
Some women may experience side effects, including:
- A period that’s lighter, heavier, early, or late
- Lower abdominal cramps
- Breast tenderness
Some women taking Plan B One‑Step® may have changes in their period, such as spotting or bleeding before their next period. If your period is more than a week late, it’s possible you might be pregnant. Get a pregnancy test and follow up with your healthcare professional.
If you vomit within 2 hours of taking Plan B, talk to your healthcare professional to find out if you should repeat the dose.
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