How long does an emergency contraceptive pill last?

Compared with other contraceptive methods, emergency contraception has more problems. Nowadays, different emergency contraceptives have different time and dosage. At the same time, you should be careful not to eat anything during the period of taking it, which will affect the efficacy of the medicine. How long does a contraceptive pill last after taking it once? How long does a contraceptive pill last after taking it once?

1. How long does the contraceptive pill last after taking it once?

Generally speaking, birth control pills are only effective for contraceptive measures before the couple takes the pills, and have no contraceptive effect on the couple's sexual intercourse after taking the pills. The effectiveness of general contraceptive pills is within 72 hours of unprotected sexual intercourse.

Female friends can consider taking contraceptives when they have an accident or have unprotected sex for other reasons, or when they get pregnant accidentally, such as due to condom damage, dislocation, or incorrect calculation of the safe period. Healthy women of childbearing age should use it within 72-120 hours after sexual intercourse after pregnancy, but the failure rate is usually higher if it exceeds 72 hours.

A common type of contraceptive is unilateral estrogen, which is represented by Yuting. One tablet of Yuting contains 0.75 mg of levonorgestrel. Take one tablet during intercourse and take another tablet 12 hours later. The probability of pregnancy after taking the medicine can be reduced to 1%-3%. Patients may experience mild nausea, vomiting and spotting after taking the medicine. Another type of contraceptive is anti-estrogen, the most common of which is Mifepristone (one tablet has three dosages: 50mg, 25mg, and 10mg). Take one tablet of any kind on the same day, and then take another tablet 12 hours later. You need to fast for two hours before and after taking the pills. The probability of pregnancy after taking the medicine can be reduced to less than 1%, there are few adverse reactions, and everyone will have changes in their menstrual period. If vomiting occurs within two hours after taking the medicine, you should spit out the medicine and take the same amount of medicine again.

2. Is it harmful to take the contraceptive pill once in a while?

Sometimes it is okay to take the birth control pill once, because the birth control pill is a relatively short-acting drug, so it will not stay in our body for a long time. It is mainly effective for those who do not use contraceptive methods during sexual life or those who accidentally get pregnant. Generally speaking, after taking it, emergency contraceptive can be excreted from the body in about 3 days, and will not cause great harm to the human body. Compared with an unexpected pregnancy, taking birth control pills causes the least harm.

1. Irregular menstruation.

This is the most common side effect after taking emergency contraception. If you have not had your period for more than three months after taking emergency contraception, it is recommended that you go to the hospital for a check-up. Do not delay it, otherwise a minor problem will develop into a serious illness.

2. Nausea and vomiting.

Emergency contraception contains a lot of estrogen. Taking it suddenly can cause stomach discomfort due to excessive estrogen, especially for thinner women who are still in puberty. This situation may last for many months. In order to reduce the nausea and vomiting reaction, you can take the medicine before going to bed or take it while eating.