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When used as directed, Plan B® One-Step is safe and effective.
Some women may experience side effects similar to those of many birth control pills. These include:
- Changes in your period
- Nausea
- Lower Abdominal Pain
- Fatigue
- Headache
- Dizziness
- Breast Tenderness
If you should experience severe abdominal pain, you may have an ectopic pregnancy and should get immediate medical attention.
The only way of knowing Plan B® One-Step has worked is when you get your next period, which should come at the expected time or within a week of the expected time. If your period is more than 7 days late, you may be pregnant.
Keep in mind, Plan B® One-Step is less likely to work if:
- You have unprotected sex, or contraceptive failure again in the same menstrual cycle after taking Plan B® One-Step
- You've already had unprotected sex, or contraceptive failure earlier in your menstrual cycle
- You vomit within two hours of taking Plan B® One-Step (talk to your healthcare professional if this happens)
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