There are many types of contraceptives, each with its own side effects, contraceptives are divided into short-acting contraceptives, long-acting contraceptives and emergency contraceptives, the least harmful contraceptives are mainly short-acting contraceptives, but due to individual differences are not suitable for all people, the specific type of the most appropriate can consult a medical professional. Short-acting contraceptive pills are widely used and have fewer side effects. Short-acting contraceptives contain less estrogen and progesterone, so they are less harmful to the body, such as compound norethindrone tablets. It has little effect on the ovarian function of a normal human body. Side effects are mainly characterized by irregular vaginal bleeding, dizziness, nausea and other gastrointestinal reactions. Long-acting contraceptive pills and emergency contraceptive pills contain a large number of progestin preparations, which have more side effects, and may cause irregular vaginal bleeding, contraceptive failure, and endocrine disruption syndrome. There are also certain contraindications to the use of contraceptives, such as pregnant women, women over 35 years of age who smoke, patients with thrombophilia, and patients with severe hypertension and diabetes mellitus. Compared with the long-acting contraceptive pill and emergency contraceptive pill, the short-acting contraceptive pill has relatively fewer side effects. You need to follow the advice of a medical professional before use.