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What are the side effects of levonorgestrel?

The most commonly reported side effects of levonorgestrel include: nausea, stomach pain, fatigue, headaches and changes in menstrual flow. Vomiting, diarrhea, breast tenderness and dizziness also may occur. If you have an allergic reaction to this drug marked by an itchy rash, hives, breathing difficulties or swelling in your mouth, face or throat, seek emergency medical care. Also, get immediate help if you develop pain low in your stomach that's severe and persistent, if you miss your period or if you see spotting instead of your normal flow during your period.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.