How long can contraceptive pills last? They are only effective when taken correctly.

Due to work or life reasons, many people usually use birth control pills to prevent pregnancy. Contraceptive pills can not only ensure that women can have fewer miscarriages, but also save the health of their uterus. There are many types of contraceptive pills. They can normally work within 72 hours after taking them. Too long or too short a time will affect the contraceptive effect. Choose the correct method of taking according to different types of contraceptive pills.

Here are three common ways to take contraceptive pills:

1. Short-acting contraceptives: The main ingredients are progesterone and estrogen. It has the effects of inhibiting ovulation, hindering the normal growth of the endometrium, changing the properties of cervical mucus and changing the normal peristalsis of the fallopian tubes. Suitable for women without underlying diseases or diabetes. Start taking the medicine on the 5th day from the day of menstruation, 1 tablet every night for 22 consecutive days, which can prevent pregnancy for 1 month.

2. Emergency contraceptive pills: the main ingredient is progesterone. The drug's mechanism of action is basically the same as that of short-acting contraceptives. Suitable for women under 40 years old. The main ones are Yuting, Nuoshuang, Baoshiting and Mifepristone tablets. Generally, the first tablet should be taken within 72 hours after sexual intercourse, and then another tablet should be taken 12 hours later. The earlier you take it, the better the effect.

3. Long-acting contraceptive pills: Generally, take one tablet on the fifth day after menstruation, and another tablet after 20 days. Contains synthetic progestin and long-acting estrogen. After the drug enters the human body, it will be stored in the fat tissue and then slowly released to inhibit ovulation and act as a long-term contraceptive. It is suitable for women who cannot have an intrauterine contraceptive device and are unwilling to use other contraceptive methods.

Warm reminder: Contraceptive pills are a remedy for contraceptive failure and are generally only effective when taken within the prescribed time. However, oral contraceptives vary from person to person and their usage is also different. But one very important point is that no matter what contraceptive, it cannot be taken for a long time.