Oral contraceptives are divided into short-acting, long-acting and emergency contraceptives. The main ingredients of long-acting contraceptive pills are large doses of progestin and estrogen. Taking long-acting contraceptive pills can cause some adverse reactions, and the common side effects include: 1. the normal endocrine function of the ovaries is disturbed due to the effects of the pills, which may lead to increased menstruation, prolonged periods or amenorrhea; 2. some symptoms similar to early pregnancy reactions may occur after taking the pills, such as nausea, vomiting, aversion to greasy food, dizziness, etc.; 3. some patients may experience increased vaginal discharge after taking long-acting pills for 3-6 months; 4. After taking long-acting contraceptive pills for 3-6 months, there will be an increase in vaginal discharge; 4. It may cause swelling of lower limbs, breast pain, headache and other symptoms. Short-acting contraceptive pills are generally less harmful and can also play a role in adjusting the menstrual cycle. However, it is recommended that contraceptive drugs should not be taken for a long time, as it will increase the probability of developing uterine fibroids and tumors of the reproductive system. It is best to use condoms or to use safe and effective methods of contraception such as the IUD and ligation. Emergency contraceptive pills are generally the most harmful to the body, so do not take them in non-special circumstances, and do not take them several times in a short period of time.