Postinor-2 is an emergency contraceptive pill that is used to prevent pregnancy when taken within 72 hours of unprotected intercourse. It is not intended as a regular method of contraception and should only be used in emergency situations. Postinor-2 contains levonorgestrel, a synthetic hormone-like active substance that is thought to work by delaying the release of the egg or preventing sperm from fertilizing any egg that has already been released. It is estimated that Postinor-2 will prevent 85% of expected pregnancies, with a higher success rate if taken within the first 24 hours.

Here are some key points about Postinor-2:

• It is a single pill solution that should be taken as soon as possible after unprotected sex.
• If taken within 24 hours, there is a 95% chance of preventing pregnancy. If taken after 48-72 hours, there is a 58% chance.
• It is not known whether it is effective if taken more than 72 hours after unprotected intercourse.
• Postinor-2 will not prevent sexually transmitted diseases.
• It should not be taken if you are already pregnant, have unprotected intercourse more than 72 hours earlier in the same menstrual cycle, have unexplained vaginal bleeding, have breast cancer, have liver problems, or are hypersensitive to any of its ingredients.
• It may interact with certain medications, such as those used to treat epilepsy, tuberculosis, HIV infection, and fungal infections.

It is important to note that Postinor-2 should not be used as a regular method of contraception and should only be used in emergency situations. If you do not get your period within 3 weeks of taking the pill, you should see your doctor, as you may be pregnant.