Levonorgestrel is used to prevent pregnancy after unprotected sexual intercourse. Levonorgestrel is in a class of medications called progestins. It works by preventing the release of an egg from the ovary or preventing fertilization of the egg by sperm. It also may work by changing the lining of the uterus to prevent development of a pregnancy.

Levonorgestrel is an emergency contraceptive within 72 hours of unprotected sexual intercourse or failure of a contraceptive method.

heavier or lighter than usual menstrual bleeding

spotting or bleeding between menstrual periods

nausea

vomiting

diarrhea

tiredness

headache

dizziness

breast pain or tenderness

• Although you are using this medicine to prevent pregnancy, you should know that using this medicine while you are pregnant could harm the unborn baby.
• Call your doctor right away if you have severe lower abdominal or stomach pain 3 to 5 weeks after taking this medicine. You may have a pregnancy outside of the uterus , which is called an ectopic pregnancy..
• You may have some blood spotting a few days after taking this medicine. If the bleeding continues for more than 1 week, check with your doctor right away.
• This medicine will not protect you from getting HIV/AIDS or other sexually transmitted infections. If this is a concern for you, talk with your doctor.