Mechanism of Action: Levonorgestrel is a progestin (female hormones). It works to prevent pregnancy by temporarily stopping the release of an egg from the ovary, or preventing fertilization (union) of the egg by sperm. It may also alter the lining of the uterus (womb) to stop a fertilized egg from attaching to the uterus.
Dosage: Within 72 Hours of unprotected intercourse