There is no such thing as the best emergency contraceptive drug, as long as you choose the regular large manufacturers of contraceptive drugs, the correct use of contraceptive drugs contraceptive effect are very good, can reach more than 99%. For example, the commonly used Mintin is an emergency contraceptive drug, which should be taken according to the instructions of the drug, immediately after sex or within 72 hours to have contraceptive effect. If more than 72 hours, the emergency contraceptive drugs have no contraceptive effect, taking emergency contraceptive drugs, only to the previous sexual life has a protective effect, if you take emergency contraceptive drugs, again sex is recommended to take a practical and reliable contraceptive methods, such as the male partner to use condoms.