How Many Days Does Postinor 2 Stay In the body?

If you are a sexually active person who wants to prevent an unplanned pregnancy, you may have heard of Postinor 2, a type of emergency contraceptive pill that can be taken after unprotected sex, failed contraception, or sexual assault. While Postinor 2 can reduce the risk of pregnancy, it is not 100% effective and it does not protect against sexually transmitted infections (STIs). Moreover, Postinor 2 can have side effects, interact with other medications, and affect your menstrual cycle. Therefore, it is important to use Postinor 2 only as a last resort, after consulting with a healthcare provider or a pharmacist who can explain how it works and what to expect. In this article, we will answer the question “How many days does Postinor 2 work in the body?” by exploring the science, the myths, and the risks of this emergency contraceptive.

How long does Postinor 2 stay in your system?

The duration of action of Postinor 2 depends on several factors, such as your metabolism, your weight, your liver function, and your hormonal balance. However, on average, the levonorgestrel in Postinor 2 stays in your system for up to 5 days, during which it can prevent ovulation and fertilization. After 5 days, the concentration of levonorgestrel in your blood decreases, and its effectiveness decreases accordingly.
Therefore, if you have unprotected sex again within 5 days of taking Postinor 2, you may need to take another dose to ensure continued protection. However, taking Postinor 2 too often can disrupt your hormonal balance and cause irregular bleeding, so it should not be used as a regular form of contraception.

How does Postinor 2 work?

To understand how long Postinor 2 works in the body, we need to know how it works in the first place. Postinor 2 contains levonorgestrel, a synthetic hormone that is similar to progesterone, a natural hormone that regulates the menstrual cycle and prepares the uterus for pregnancy. When you take Postinor 2, the levonorgestrel enters your bloodstream and travels to your ovaries, where it inhibits or delays ovulation, the release of an egg from the ovary. Without ovulation, there is no egg for the sperm to fertilize, and hence no pregnancy can occur.
In addition, Postinor 2 thickens the cervical mucus, making it harder for the sperm to swim through the cervix and reach the egg. Furthermore, Postinor 2 may affect the lining of the uterus, making it less receptive to the implantation of a fertilized egg. However, if ovulation has already occurred, or if fertilization has already taken place, Postinor 2 may not be able to prevent pregnancy.

How long after sex can you take Postinor 2?

Postinor 2 is designed to be taken as soon as possible after unprotected sex, ideally within 12 hours, but no later than 72 hours (3 days) after sex. The earlier you take Postinor 2, the more effective it is, as it has less time for ovulation to occur. However, even if you take Postinor 2 within 24 hours, it is not guaranteed to prevent pregnancy, as it has a failure rate of about 2-3% when used perfectly. If you wait longer than 72 hours, Postinor 2 may not work at all, as ovulation may have already occurred or the fertilized egg may have already implanted in the uterus. Therefore, it is important to act fast and seek emergency contraception as soon as possible, even if you are not sure whether you are at risk of pregnancy.


If you’re wondering “how many days does Postinor 2 stay in the body?” the answer is that it can vary from person to person. While the medication is typically eliminated from the body within 48 hours, it may take longer for some individuals. It’s important to note that Postinor 2 should not be used as a regular form of birth control, and that it can have side effects such as nausea and changes in menstrual bleeding. If you have any concerns about the use of Postinor 2, it’s always best to speak with a healthcare provider for guidance. Overall, understanding how long the medication stays in your body can help you make informed decisions about your sexual health.

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