Levonorgestrel may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- heavier or lighter than usual menstrual bleeding
- spotting or bleeding between menstrual periods
- breast pain or tenderness
Some side effects can be serious. If you experience the following symptom, call your doctor immediately:
- severe lower abdominal pain (3 to 5 weeks after taking levonorgestrel)
Levonorgestrel may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.