Plan B Side Effects
Generic Name: Levonorgestrel
Please note - some side effects for Plan B may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA at http://www.fda.gov/medwatch/ or 1-800-FDA-1088 (1-800-332-1088).
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For the consumer For the professional
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Side Effects of Plan B - for the consumer
Plan B
All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome when using Plan B:
Seek medical attention right away if any of these SEVERE side effects occur when using Plan B:Breast tenderness; changes in menstrual flow; diarrhea; dizziness; headache; nausea; stomach pain; tiredness; vomiting.
TopSevere allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); lower stomach pain; missed menstrual period; spotting instead of your usual period.
For the professional
Plan B
The most common adverse events in the clinical trial for women receiving Plan B® included nausea (23%), abdominal pain (18%), fatigue (17%), headache (17%), and menstrual changes. The table below shows those adverse events that occurred in > 5% of Plan B® users.
Most Common Adverse Events |
Plan B® Levonorgestrel
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| Nausea | 23.1 |
| Abdominal Pain | 17.6 |
| Fatigue | 16.9 |
| Headache | 16.8 |
| Heavier Menstrual Bleeding | 13.8 |
| Lighter Menstrual Bleeding | 12.5 |
| Dizziness | 11.2 |
| Breast Tenderness | 10.7 |
| Other complaints | 9.7 |
| Vomiting | 5.6 |
| Diarrhea | 5.0 |
Plan B® demonstrated a superior safety profile over the Yuzpe regimen for the following adverse events:
- Nausea: Occurred in 23% of women taking Plan B® (compared to 50% with Yuzpe)
- Vomiting: Occurred in 6% of women taking Plan B® (compared to 19% with Yuzpe)
More resources:
Plan B - Includes detailed dosage instructions.
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