What are the possible side effects of levonorgestrel emergency contraceptive (Next Choice, Plan B, Plan B One-Step)?
Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.
Call your doctor at once if you have severe pain in your lower stomach or side. This could be a sign of a tubal pregnancy (a pregnancy that implants in the fallopian tube instead of the uterus). A tubal pregnancy is a medical emergency.
Less serious side effects may include:
- nausea, diarrhea, or stomach pain;
- dizziness, tired...
Read All Potential Side Effects and See Pictures of Plan B One-Step »