Counter medication: none

Used by women to prevent pregnancy after birth control failure (such as a broken condom) or unprotected sex. This medication is an emergency contraceptive and should not be used as a regular form of birth control. It is a progestin hormone that works mainly by preventing the release of an egg (ovulation) during your menstrual cycle. It also makes vaginal fluid thicker to help prevent sperm from reaching an egg (fertilization) and changes the lining of the uterus (womb) to prevent attachment of a fertilized egg.
DOSAGE: If you are taking the over-the-counter product to self-treat, read all directions on the product package before taking this medication. If you have any questions, talk to your pharmacist. If your doctor has prescribed this medication, take it as directed.Take 1 tablet by mouth with or without food as soon as possible after unprotected sex. This medication works best when it is taken within 72 hours (3 days) after unprotected sex.If you vomit within 2 hours of taking this medication, contact your doctor to ask if you need to repeat the dose. Before taking this medication, tell your doctor or pharmacist if you are allergic to it or to other progestins (such as norethindrone) or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
SIDE EFFECTS: Nausea/vomiting, abdominal pain, tiredness, dizziness, changes in vaginal bleeding, breast tenderness, or headache may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.