Many people take the emergency contraceptive pill after sex to avoid the dangers of an unplanned pregnancy. But, did you know? There are some after-effects that can occur after taking the pill. Here is what are the dangers of emergency contraceptive pills? What is the emergency contraceptive pill? The emergency contraceptive pill is effective within 72 hours after intercourse when a woman is not planning to get pregnant, but if she has sex during the pill, the time should be re-calculated. It should be applied within 72-120 hours after sexual intercourse for healthy women of childbearing age to exclude pregnancy, the earlier you take it the better the effect, more than 72 hours often has a higher failure rate. It should not be taken more than 2 times a year, otherwise it will cause habitual abortion. Hazards of emergency contraceptive pills Nausea: After taking, the symptoms of nausea usually last no more than 24 hours. Vomiting: Taking the pill at the same time as food or before going to bed can reduce the incidence of nausea and vomiting. If you vomit within 1 hour after taking the oral emergency contraceptive pill, you should take 1 additional dose as soon as possible. Enteric contraceptives do not need to be taken without it because they dissolve only when they reach the intestines. Irregular uterine bleeding: Some women will have spotting bleeding after using the pill, which usually does not need to be treated, but it is important to let the user know about such situation and to do the consultation and education before and after using the pill. Menstrual changes: Most women will have menstruation on time, but some women have early or delayed menstruation. If menstruation is delayed for a week, a urine pregnancy test should be done to determine if the emergency contraception has failed. Ovulation changes: Taking emergency contraceptive pills can affect the menstrual cycle. Women should try to use efficient contraceptive methods after this, rather than risk using emergency contraceptive pills or unscientific contraceptive methods such as safe periods or in vitro ejaculation, which can lead to infertility in severe cases. Others: breast swelling and pain, headache, dizziness and weakness, etc. These symptoms are usually mild and last no more than 24 hours. Severe breast pain and headache can be treated symptomatically with aspirin or other painkillers. People who cannot take emergency contraceptive pills Patients with major diseases Because hormonal drugs have to be metabolized in the liver and excreted from the kidneys, the use of drugs will increase the burden of liver and kidney function, so patients with acute and chronic hepatitis or nephritis should not use them. Patients with hematological and endocrine diseases Contraceptives can cause hypercoagulability and increase the risk of thrombosis, increase blood sugar and affect thyroid function. Gynecological tumor patients As most gynecological tumors and breast diseases are hormone-dependent diseases, taking contraceptives containing estrogen and progestin can aggravate the disease and should be prohibited. Psychiatric patients Psychiatric patients who are unable to take care of themselves may take the wrong dose by mistake and have adverse consequences. The contraceptive pill may further reduce menstruation; 2. Those who are over 45 years of age; 3. The hormone level fluctuates greatly during this period and contraception with the pill is generally not recommended; 4. Women who are over 35 years of age but smoke; 5. It should not be taken for a long time to avoid premature failure of ovarian function; Lactating women The contraceptive pill may inhibit lactation and may affect the development of the newborn through lactation, therefore Therefore, it should not be used by nursing mothers.