Plan B Levonorgestrel Emergency Contraception

Each Plan B tablet contains 1.5 mg of levonorgestrel, an ingredient that is also commonly found in birth control pills. When taken correctly (within 72 hours of a contraceptive accident or unprotected sex) Plan B works by:
Recommended Dose: Take one tablet as soon as possible, within 72 hours after a contraceptive accident or unprotected sex. The sooner you start treatment, the more effective it will be (preferably within 12 hours after a contraceptive accident or unprotected sex). Do not take more than directed.

Serious Warnings and Precautions:
Be sure to talk to a doctor or pharmacist before taking Plan B if you have any of the following conditions: undiagnosed abnormal vaginal bleeding, known or suspected breast cancer, active liver disease or tumour, high blood pressure, diabetes, or if you are taking any prescription drugs, if you are breastfeeding, or if you have a confirmed or suspected pregnancy. Also make sure that you’re not allergic to levonorgestrel or any of the non-medicinal ingredients contained in Plan B: colloidal silicon dioxide, potato starch, magnesium stearate, talc, corn starch and lactose monohydrate.

Severe reactions to Plan B are uncommon. Temporary side effects, however, may occur and usually pass within 24 hours. The most common side effects include nausea, abdominal pain, fatigue, headache, dizziness, breast tenderness, vomiting, diarrhea, and irregular menstrual bleeding. Less common reactions are migraine or severe headache, lower abdominal pain, painful menstruation, and vaginal discharge. If your period is more than a week late or if these symptoms continue for more than 48 hours or are severe, see a healthcare professional. Be sure to contact a healthcare professional immediately if you experience any of the following serious side effects: itching and rash, cramping or severe pain in your stomach or belly before your next normal period, uterine hemorrhage, vaginal hemorrhage. If you vomit within two hours of taking Plan B, you may need to take another dose.