Contraceptive pills are very harmful, contraceptive pills can cause headache, nausea, vomiting and other symptoms, but also prone to cause endocrine disorders, if you often take contraceptive pills, it is also easy to affect the future fertility, so do not take contraceptive pills often. In particular, emergency contraceptive pills have more side effects and should not be taken more than 3 times a year at most. If you do not intend to get pregnant, it is recommended to do a good job of contraceptive measures, it is best to use condoms, you can also use the contraceptive ring, if the menstrual period is regular, you can also have intercourse during the safe period, which can be contraceptive. Note that after taking the pill, it is best to drink more water, and it is recommended that reasonable supplementation of vitamins can reduce the side effects of contraceptive pills, it is recommended that appropriate exercise, regular blood tests hormone six to see.