Contraceptive pills can be categorized into short-acting, long-acting and emergency contraceptive pills, and different types of contraceptive pills have different names. 1. Short-acting contraceptive pills: including deoxypregnene ethinyl estradiol tablets, ethinyl estradiol cyproterone tablets and other drugs, can be used to treat irregular menstruation, polycystic ovary syndrome, etc., but the drug may lead to the emergence of early pregnancy reaction, nausea and vomiting, etc., and these cases generally do not need treatment. 2. Long-acting contraceptives: including levonorgestrel ethinyl estradiol tablets, etrogestrel and other drugs, can be used to inhibit ovulation, affecting the effect of embryo implantation, but pay attention to breast lumps, diabetes, cardiovascular disease, hypertension, and hyperthyroidism and other patients prohibited the drug. 3. Emergency contraceptive pills: including levonorgestrel tablets, mifepristone tablets and other drugs, usually in the absence of timely contraceptive measures or take contraceptive measures failed to use, after taking emergency contraceptive pills will make the uterine lining rapidly thickening so that it blocked the embryo bedding, so as to achieve the effect of contraception, the use of emergency contraceptive pills may result in menstrual disorders and other symptoms. All of the above drugs should be used under the guidance of a professional doctor to avoid the adverse effects of self-medication.