What are common side effects of the plan b emergency contraceptive?

Nausea: Usually nausea is the most common side effect of Plan B but also cramping and headaches as well.

Just few: Nausea, vomiting, vaginal bleeding, menstrual irregularities, abdominal pain, fatigue, headache, dizziness, breast tenderness, diarrhea.

Plan B: Potential Side effects w emergency contraception: tender breasts; menstrual flow changes (spotting, bleeding, early or late period); loose stools; dizziness; headache; nausea/ vomiting; abdominal pain / cramping or fatigue. For chest tightness, difficulty breathing, swelling of lips, mouth, throat – call 911. Take pregnancy test & notify Dr if your period is 7 or > days late.