The price of emergency contraceptive pills cannot be determined, and the typical price is in the teens to tens of dollars. Because emergency contraceptive pills are available in a variety of origins, the price varies from one origin to another and from one region to another. This drug is mainly used in the absence of contraception and sexual relations, may lead to accidental fertilization, it is recommended to take, but must be taken within 72 hours, the earlier the oral effect of the better. Although the contraceptive rate of this drug is very high, but it can not completely play a contraceptive effect, it is easy to lead to endocrine disorders in women, resulting in menstrual disorders. It is best to use contraceptive measures, such as an IUD or a condom.